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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains the login functions used by the iSCSI Target driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
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 | ||
69110e3c | 19 | #include <crypto/hash.h> |
e48354ce NB |
20 | #include <linux/string.h> |
21 | #include <linux/kthread.h> | |
40401530 | 22 | #include <linux/idr.h> |
e48354ce NB |
23 | #include <scsi/iscsi_proto.h> |
24 | #include <target/target_core_base.h> | |
c4795fb2 | 25 | #include <target/target_core_fabric.h> |
e48354ce | 26 | |
67f091f2 SG |
27 | #include <target/iscsi/iscsi_target_core.h> |
28 | #include <target/iscsi/iscsi_target_stat.h> | |
e48354ce NB |
29 | #include "iscsi_target_device.h" |
30 | #include "iscsi_target_nego.h" | |
31 | #include "iscsi_target_erl0.h" | |
32 | #include "iscsi_target_erl2.h" | |
33 | #include "iscsi_target_login.h" | |
e48354ce NB |
34 | #include "iscsi_target_tpg.h" |
35 | #include "iscsi_target_util.h" | |
36 | #include "iscsi_target.h" | |
37 | #include "iscsi_target_parameters.h" | |
38 | ||
baa4d64b NB |
39 | #include <target/iscsi/iscsi_transport.h> |
40 | ||
41 | static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) | |
e48354ce | 42 | { |
baa4d64b NB |
43 | struct iscsi_login *login; |
44 | ||
45 | login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); | |
46 | if (!login) { | |
47 | pr_err("Unable to allocate memory for struct iscsi_login.\n"); | |
48 | return NULL; | |
49 | } | |
a91eb7d9 | 50 | conn->login = login; |
baa4d64b NB |
51 | login->conn = conn; |
52 | login->first_request = 1; | |
53 | ||
54 | login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
55 | if (!login->req_buf) { | |
56 | pr_err("Unable to allocate memory for response buffer.\n"); | |
57 | goto out_login; | |
58 | } | |
59 | ||
60 | login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
61 | if (!login->rsp_buf) { | |
62 | pr_err("Unable to allocate memory for request buffer.\n"); | |
63 | goto out_req_buf; | |
64 | } | |
65 | ||
66 | conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); | |
67 | if (!conn->conn_ops) { | |
68 | pr_err("Unable to allocate memory for" | |
69 | " struct iscsi_conn_ops.\n"); | |
70 | goto out_rsp_buf; | |
71 | } | |
72 | ||
d5627acb | 73 | init_waitqueue_head(&conn->queues_wq); |
e48354ce NB |
74 | INIT_LIST_HEAD(&conn->conn_list); |
75 | INIT_LIST_HEAD(&conn->conn_cmd_list); | |
76 | INIT_LIST_HEAD(&conn->immed_queue_list); | |
77 | INIT_LIST_HEAD(&conn->response_queue_list); | |
78 | init_completion(&conn->conn_post_wait_comp); | |
79 | init_completion(&conn->conn_wait_comp); | |
80 | init_completion(&conn->conn_wait_rcfr_comp); | |
81 | init_completion(&conn->conn_waiting_on_uc_comp); | |
82 | init_completion(&conn->conn_logout_comp); | |
83 | init_completion(&conn->rx_half_close_comp); | |
84 | init_completion(&conn->tx_half_close_comp); | |
e5419865 | 85 | init_completion(&conn->rx_login_comp); |
e48354ce NB |
86 | spin_lock_init(&conn->cmd_lock); |
87 | spin_lock_init(&conn->conn_usage_lock); | |
88 | spin_lock_init(&conn->immed_queue_lock); | |
89 | spin_lock_init(&conn->nopin_timer_lock); | |
90 | spin_lock_init(&conn->response_queue_lock); | |
91 | spin_lock_init(&conn->state_lock); | |
92 | ||
93 | if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { | |
94 | pr_err("Unable to allocate conn->conn_cpumask\n"); | |
baa4d64b | 95 | goto out_conn_ops; |
e48354ce | 96 | } |
baa4d64b | 97 | conn->conn_login = login; |
e48354ce | 98 | |
baa4d64b NB |
99 | return login; |
100 | ||
101 | out_conn_ops: | |
102 | kfree(conn->conn_ops); | |
103 | out_rsp_buf: | |
104 | kfree(login->rsp_buf); | |
105 | out_req_buf: | |
106 | kfree(login->req_buf); | |
107 | out_login: | |
108 | kfree(login); | |
109 | return NULL; | |
e48354ce NB |
110 | } |
111 | ||
112 | /* | |
113 | * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup | |
114 | * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel | |
115 | */ | |
116 | int iscsi_login_setup_crypto(struct iscsi_conn *conn) | |
117 | { | |
69110e3c HX |
118 | struct crypto_ahash *tfm; |
119 | ||
e48354ce NB |
120 | /* |
121 | * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts | |
122 | * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback | |
123 | * to software 1x8 byte slicing from crc32c.ko | |
124 | */ | |
69110e3c HX |
125 | tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); |
126 | if (IS_ERR(tfm)) { | |
127 | pr_err("crypto_alloc_ahash() failed\n"); | |
e48354ce NB |
128 | return -ENOMEM; |
129 | } | |
130 | ||
69110e3c HX |
131 | conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL); |
132 | if (!conn->conn_rx_hash) { | |
133 | pr_err("ahash_request_alloc() failed for conn_rx_hash\n"); | |
134 | crypto_free_ahash(tfm); | |
135 | return -ENOMEM; | |
136 | } | |
137 | ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL); | |
138 | ||
139 | conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL); | |
140 | if (!conn->conn_tx_hash) { | |
141 | pr_err("ahash_request_alloc() failed for conn_tx_hash\n"); | |
142 | ahash_request_free(conn->conn_rx_hash); | |
143 | conn->conn_rx_hash = NULL; | |
144 | crypto_free_ahash(tfm); | |
e48354ce NB |
145 | return -ENOMEM; |
146 | } | |
69110e3c | 147 | ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); |
e48354ce NB |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int iscsi_login_check_initiator_version( | |
153 | struct iscsi_conn *conn, | |
154 | u8 version_max, | |
155 | u8 version_min) | |
156 | { | |
157 | if ((version_max != 0x00) || (version_min != 0x00)) { | |
158 | pr_err("Unsupported iSCSI IETF Pre-RFC Revision," | |
159 | " version Min/Max 0x%02x/0x%02x, rejecting login.\n", | |
160 | version_min, version_max); | |
161 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
162 | ISCSI_LOGIN_STATUS_NO_VERSION); | |
163 | return -1; | |
164 | } | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) | |
170 | { | |
171 | int sessiontype; | |
172 | struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; | |
173 | struct iscsi_portal_group *tpg = conn->tpg; | |
174 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
175 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
176 | struct se_session *se_sess, *se_sess_tmp; | |
177 | ||
178 | initiatorname_param = iscsi_find_param_from_key( | |
179 | INITIATORNAME, conn->param_list); | |
e48354ce NB |
180 | sessiontype_param = iscsi_find_param_from_key( |
181 | SESSIONTYPE, conn->param_list); | |
1c5c12c6 RD |
182 | if (!initiatorname_param || !sessiontype_param) { |
183 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
184 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); | |
e48354ce | 185 | return -1; |
1c5c12c6 | 186 | } |
e48354ce NB |
187 | |
188 | sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; | |
189 | ||
190 | spin_lock_bh(&se_tpg->session_lock); | |
191 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
192 | sess_list) { | |
193 | ||
8359cf43 | 194 | sess_p = se_sess->fabric_sess_ptr; |
e48354ce NB |
195 | spin_lock(&sess_p->conn_lock); |
196 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
197 | atomic_read(&sess_p->session_logout) || | |
198 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
199 | spin_unlock(&sess_p->conn_lock); | |
200 | continue; | |
201 | } | |
8359cf43 JE |
202 | if (!memcmp(sess_p->isid, conn->sess->isid, 6) && |
203 | (!strcmp(sess_p->sess_ops->InitiatorName, | |
204 | initiatorname_param->value) && | |
e48354ce NB |
205 | (sess_p->sess_ops->SessionType == sessiontype))) { |
206 | atomic_set(&sess_p->session_reinstatement, 1); | |
207 | spin_unlock(&sess_p->conn_lock); | |
208 | iscsit_inc_session_usage_count(sess_p); | |
209 | iscsit_stop_time2retain_timer(sess_p); | |
210 | sess = sess_p; | |
211 | break; | |
212 | } | |
213 | spin_unlock(&sess_p->conn_lock); | |
214 | } | |
215 | spin_unlock_bh(&se_tpg->session_lock); | |
216 | /* | |
217 | * If the Time2Retain handler has expired, the session is already gone. | |
218 | */ | |
219 | if (!sess) | |
220 | return 0; | |
221 | ||
222 | pr_debug("%s iSCSI Session SID %u is still active for %s," | |
223 | " preforming session reinstatement.\n", (sessiontype) ? | |
224 | "Discovery" : "Normal", sess->sid, | |
225 | sess->sess_ops->InitiatorName); | |
226 | ||
227 | spin_lock_bh(&sess->conn_lock); | |
228 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
229 | spin_unlock_bh(&sess->conn_lock); | |
230 | iscsit_dec_session_usage_count(sess); | |
44f33d0f | 231 | iscsit_close_session(sess); |
99367f01 | 232 | return 0; |
e48354ce NB |
233 | } |
234 | spin_unlock_bh(&sess->conn_lock); | |
235 | ||
236 | iscsit_stop_session(sess, 1, 1); | |
237 | iscsit_dec_session_usage_count(sess); | |
238 | ||
44f33d0f | 239 | iscsit_close_session(sess); |
99367f01 | 240 | return 0; |
e48354ce NB |
241 | } |
242 | ||
243 | static void iscsi_login_set_conn_values( | |
244 | struct iscsi_session *sess, | |
245 | struct iscsi_conn *conn, | |
50e5c87d | 246 | __be16 cid) |
e48354ce NB |
247 | { |
248 | conn->sess = sess; | |
50e5c87d | 249 | conn->cid = be16_to_cpu(cid); |
e48354ce NB |
250 | /* |
251 | * Generate a random Status sequence number (statsn) for the new | |
252 | * iSCSI connection. | |
253 | */ | |
254 | get_random_bytes(&conn->stat_sn, sizeof(u32)); | |
255 | ||
256 | mutex_lock(&auth_id_lock); | |
257 | conn->auth_id = iscsit_global->auth_id++; | |
258 | mutex_unlock(&auth_id_lock); | |
259 | } | |
260 | ||
d2faaefb | 261 | __printf(2, 3) int iscsi_change_param_sprintf( |
79d59d08 RD |
262 | struct iscsi_conn *conn, |
263 | const char *fmt, ...) | |
264 | { | |
265 | va_list args; | |
266 | unsigned char buf[64]; | |
267 | ||
268 | memset(buf, 0, sizeof buf); | |
269 | ||
270 | va_start(args, fmt); | |
271 | vsnprintf(buf, sizeof buf, fmt, args); | |
272 | va_end(args); | |
273 | ||
274 | if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { | |
275 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
276 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
277 | return -1; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
d2faaefb | 282 | EXPORT_SYMBOL(iscsi_change_param_sprintf); |
79d59d08 | 283 | |
e48354ce NB |
284 | /* |
285 | * This is the leading connection of a new session, | |
286 | * or session reinstatement. | |
287 | */ | |
288 | static int iscsi_login_zero_tsih_s1( | |
289 | struct iscsi_conn *conn, | |
290 | unsigned char *buf) | |
291 | { | |
292 | struct iscsi_session *sess = NULL; | |
293 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
13b5533a | 294 | int ret; |
e48354ce NB |
295 | |
296 | sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); | |
297 | if (!sess) { | |
298 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
299 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
300 | pr_err("Could not allocate memory for session\n"); | |
0957627a | 301 | return -ENOMEM; |
e48354ce NB |
302 | } |
303 | ||
304 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
305 | sess->init_task_tag = pdu->itt; | |
8359cf43 | 306 | memcpy(&sess->isid, pdu->isid, 6); |
50e5c87d | 307 | sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
e48354ce NB |
308 | INIT_LIST_HEAD(&sess->sess_conn_list); |
309 | INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); | |
310 | INIT_LIST_HEAD(&sess->cr_active_list); | |
311 | INIT_LIST_HEAD(&sess->cr_inactive_list); | |
312 | init_completion(&sess->async_msg_comp); | |
313 | init_completion(&sess->reinstatement_comp); | |
314 | init_completion(&sess->session_wait_comp); | |
315 | init_completion(&sess->session_waiting_on_uc_comp); | |
316 | mutex_init(&sess->cmdsn_mutex); | |
317 | spin_lock_init(&sess->conn_lock); | |
318 | spin_lock_init(&sess->cr_a_lock); | |
319 | spin_lock_init(&sess->cr_i_lock); | |
320 | spin_lock_init(&sess->session_usage_lock); | |
321 | spin_lock_init(&sess->ttt_lock); | |
322 | ||
c9365bd0 | 323 | idr_preload(GFP_KERNEL); |
998866b0 | 324 | spin_lock_bh(&sess_idr_lock); |
c9365bd0 TH |
325 | ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
326 | if (ret >= 0) | |
327 | sess->session_index = ret; | |
998866b0 | 328 | spin_unlock_bh(&sess_idr_lock); |
c9365bd0 | 329 | idr_preload_end(); |
e48354ce | 330 | |
13b5533a | 331 | if (ret < 0) { |
c9365bd0 | 332 | pr_err("idr_alloc() for sess_idr failed\n"); |
13b5533a BW |
333 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
334 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
335 | kfree(sess); | |
336 | return -ENOMEM; | |
337 | } | |
338 | ||
e48354ce | 339 | sess->creation_time = get_jiffies_64(); |
e48354ce NB |
340 | /* |
341 | * The FFP CmdSN window values will be allocated from the TPG's | |
342 | * Initiator Node's ACL once the login has been successfully completed. | |
343 | */ | |
109e2381 | 344 | atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); |
e48354ce NB |
345 | |
346 | sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); | |
347 | if (!sess->sess_ops) { | |
348 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
349 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
350 | pr_err("Unable to allocate memory for" | |
351 | " struct iscsi_sess_ops.\n"); | |
0957627a NB |
352 | kfree(sess); |
353 | return -ENOMEM; | |
e48354ce NB |
354 | } |
355 | ||
23a548ee | 356 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
0957627a | 357 | if (IS_ERR(sess->se_sess)) { |
e48354ce NB |
358 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
359 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
a928d28d | 360 | kfree(sess->sess_ops); |
0957627a NB |
361 | kfree(sess); |
362 | return -ENOMEM; | |
e48354ce NB |
363 | } |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | static int iscsi_login_zero_tsih_s2( | |
369 | struct iscsi_conn *conn) | |
370 | { | |
371 | struct iscsi_node_attrib *na; | |
372 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 373 | bool iser = false; |
e48354ce NB |
374 | |
375 | sess->tpg = conn->tpg; | |
376 | ||
377 | /* | |
378 | * Assign a new TPG Session Handle. Note this is protected with | |
379 | * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). | |
380 | */ | |
60bfcf8e | 381 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce | 382 | if (!sess->tsih) |
60bfcf8e | 383 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce NB |
384 | |
385 | /* | |
386 | * Create the default params from user defined values.. | |
387 | */ | |
388 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 389 | conn->tpg->param_list, 1) < 0) { |
e48354ce NB |
390 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
391 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
392 | return -1; | |
393 | } | |
394 | ||
03aa2070 NB |
395 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
396 | iser = true; | |
397 | ||
398 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
399 | |
400 | if (sess->sess_ops->SessionType) | |
401 | return iscsi_set_keys_irrelevant_for_discovery( | |
402 | conn->param_list); | |
403 | ||
404 | na = iscsit_tpg_get_node_attrib(sess); | |
405 | ||
406 | /* | |
407 | * Need to send TargetPortalGroupTag back in first login response | |
408 | * on any iSCSI connection where the Initiator provides TargetName. | |
409 | * See 5.3.1. Login Phase Start | |
410 | * | |
411 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
412 | */ | |
79d59d08 | 413 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 414 | return -1; |
e48354ce NB |
415 | |
416 | /* | |
417 | * Workaround for Initiators that have broken connection recovery logic. | |
418 | * | |
419 | * "We would really like to get rid of this." Linux-iSCSI.org team | |
420 | */ | |
79d59d08 | 421 | if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) |
e48354ce | 422 | return -1; |
e48354ce | 423 | |
03aa2070 NB |
424 | /* |
425 | * Set RDMAExtensions=Yes by default for iSER enabled network portals | |
426 | */ | |
427 | if (iser) { | |
428 | struct iscsi_param *param; | |
429 | unsigned long mrdsl, off; | |
430 | int rc; | |
431 | ||
79d59d08 | 432 | if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) |
03aa2070 | 433 | return -1; |
79d59d08 | 434 | |
03aa2070 NB |
435 | /* |
436 | * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for | |
437 | * Immediate Data + Unsolicitied Data-OUT if necessary.. | |
438 | */ | |
439 | param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", | |
440 | conn->param_list); | |
441 | if (!param) { | |
442 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
443 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
444 | return -1; | |
445 | } | |
57103d7f | 446 | rc = kstrtoul(param->value, 0, &mrdsl); |
03aa2070 NB |
447 | if (rc < 0) { |
448 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
449 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
450 | return -1; | |
451 | } | |
452 | off = mrdsl % PAGE_SIZE; | |
453 | if (!off) | |
52d0aa79 | 454 | goto check_prot; |
03aa2070 NB |
455 | |
456 | if (mrdsl < PAGE_SIZE) | |
457 | mrdsl = PAGE_SIZE; | |
458 | else | |
459 | mrdsl -= off; | |
460 | ||
461 | pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" | |
462 | " to PAGE_SIZE\n", mrdsl); | |
463 | ||
79d59d08 | 464 | if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) |
03aa2070 | 465 | return -1; |
52d0aa79 NB |
466 | /* |
467 | * ISER currently requires that ImmediateData + Unsolicited | |
468 | * Data be disabled when protection / signature MRs are enabled. | |
469 | */ | |
470 | check_prot: | |
471 | if (sess->se_sess->sup_prot_ops & | |
472 | (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | | |
473 | TARGET_PROT_DOUT_INSERT)) { | |
474 | ||
79d59d08 | 475 | if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) |
52d0aa79 | 476 | return -1; |
52d0aa79 | 477 | |
79d59d08 | 478 | if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) |
52d0aa79 | 479 | return -1; |
79d59d08 | 480 | |
52d0aa79 NB |
481 | pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" |
482 | " T10-PI enabled ISER session\n"); | |
483 | } | |
03aa2070 | 484 | } |
e48354ce NB |
485 | |
486 | return 0; | |
487 | } | |
488 | ||
e48354ce NB |
489 | static int iscsi_login_non_zero_tsih_s1( |
490 | struct iscsi_conn *conn, | |
491 | unsigned char *buf) | |
492 | { | |
493 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
494 | ||
495 | iscsi_login_set_conn_values(NULL, conn, pdu->cid); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | /* | |
500 | * Add a new connection to an existing session. | |
501 | */ | |
502 | static int iscsi_login_non_zero_tsih_s2( | |
503 | struct iscsi_conn *conn, | |
504 | unsigned char *buf) | |
505 | { | |
506 | struct iscsi_portal_group *tpg = conn->tpg; | |
507 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
508 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
509 | struct se_session *se_sess, *se_sess_tmp; | |
510 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
03aa2070 | 511 | bool iser = false; |
e48354ce NB |
512 | |
513 | spin_lock_bh(&se_tpg->session_lock); | |
514 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
515 | sess_list) { | |
516 | ||
517 | sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
518 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
519 | atomic_read(&sess_p->session_logout) || | |
520 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) | |
521 | continue; | |
8359cf43 | 522 | if (!memcmp(sess_p->isid, pdu->isid, 6) && |
50e5c87d | 523 | (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
e48354ce NB |
524 | iscsit_inc_session_usage_count(sess_p); |
525 | iscsit_stop_time2retain_timer(sess_p); | |
526 | sess = sess_p; | |
527 | break; | |
528 | } | |
529 | } | |
530 | spin_unlock_bh(&se_tpg->session_lock); | |
531 | ||
532 | /* | |
533 | * If the Time2Retain handler has expired, the session is already gone. | |
534 | */ | |
535 | if (!sess) { | |
536 | pr_err("Initiator attempting to add a connection to" | |
537 | " a non-existent session, rejecting iSCSI Login.\n"); | |
538 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
539 | ISCSI_LOGIN_STATUS_NO_SESSION); | |
540 | return -1; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Stop the Time2Retain timer if this is a failed session, we restart | |
545 | * the timer if the login is not successful. | |
546 | */ | |
547 | spin_lock_bh(&sess->conn_lock); | |
548 | if (sess->session_state == TARG_SESS_STATE_FAILED) | |
549 | atomic_set(&sess->session_continuation, 1); | |
550 | spin_unlock_bh(&sess->conn_lock); | |
551 | ||
552 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
553 | ||
554 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 555 | conn->tpg->param_list, 0) < 0) { |
e48354ce NB |
556 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
557 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
558 | return -1; | |
559 | } | |
560 | ||
03aa2070 NB |
561 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
562 | iser = true; | |
563 | ||
564 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
565 | /* |
566 | * Need to send TargetPortalGroupTag back in first login response | |
567 | * on any iSCSI connection where the Initiator provides TargetName. | |
568 | * See 5.3.1. Login Phase Start | |
569 | * | |
570 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
571 | */ | |
79d59d08 | 572 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 573 | return -1; |
e48354ce | 574 | |
c04a6091 | 575 | return 0; |
e48354ce NB |
576 | } |
577 | ||
578 | int iscsi_login_post_auth_non_zero_tsih( | |
579 | struct iscsi_conn *conn, | |
580 | u16 cid, | |
581 | u32 exp_statsn) | |
582 | { | |
583 | struct iscsi_conn *conn_ptr = NULL; | |
584 | struct iscsi_conn_recovery *cr = NULL; | |
585 | struct iscsi_session *sess = conn->sess; | |
586 | ||
587 | /* | |
588 | * By following item 5 in the login table, if we have found | |
589 | * an existing ISID and a valid/existing TSIH and an existing | |
590 | * CID we do connection reinstatement. Currently we dont not | |
591 | * support it so we send back an non-zero status class to the | |
592 | * initiator and release the new connection. | |
593 | */ | |
594 | conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); | |
ee1b1b9c | 595 | if (conn_ptr) { |
e48354ce NB |
596 | pr_err("Connection exists with CID %hu for %s," |
597 | " performing connection reinstatement.\n", | |
598 | conn_ptr->cid, sess->sess_ops->InitiatorName); | |
599 | ||
600 | iscsit_connection_reinstatement_rcfr(conn_ptr); | |
601 | iscsit_dec_conn_usage_count(conn_ptr); | |
602 | } | |
603 | ||
604 | /* | |
605 | * Check for any connection recovery entires containing CID. | |
606 | * We use the original ExpStatSN sent in the first login request | |
607 | * to acknowledge commands for the failed connection. | |
608 | * | |
609 | * Also note that an explict logout may have already been sent, | |
610 | * but the response may not be sent due to additional connection | |
611 | * loss. | |
612 | */ | |
613 | if (sess->sess_ops->ErrorRecoveryLevel == 2) { | |
614 | cr = iscsit_get_inactive_connection_recovery_entry( | |
615 | sess, cid); | |
ee1b1b9c | 616 | if (cr) { |
e48354ce NB |
617 | pr_debug("Performing implicit logout" |
618 | " for connection recovery on CID: %hu\n", | |
619 | conn->cid); | |
620 | iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); | |
621 | } | |
622 | } | |
623 | ||
624 | /* | |
625 | * Else we follow item 4 from the login table in that we have | |
626 | * found an existing ISID and a valid/existing TSIH and a new | |
627 | * CID we go ahead and continue to add a new connection to the | |
628 | * session. | |
629 | */ | |
630 | pr_debug("Adding CID %hu to existing session for %s.\n", | |
631 | cid, sess->sess_ops->InitiatorName); | |
632 | ||
633 | if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { | |
634 | pr_err("Adding additional connection to this session" | |
635 | " would exceed MaxConnections %d, login failed.\n", | |
636 | sess->sess_ops->MaxConnections); | |
637 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
638 | ISCSI_LOGIN_STATUS_ISID_ERROR); | |
639 | return -1; | |
640 | } | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static void iscsi_post_login_start_timers(struct iscsi_conn *conn) | |
646 | { | |
647 | struct iscsi_session *sess = conn->sess; | |
03aa2070 NB |
648 | /* |
649 | * FIXME: Unsolicitied NopIN support for ISER | |
650 | */ | |
651 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) | |
652 | return; | |
e48354ce NB |
653 | |
654 | if (!sess->sess_ops->SessionType) | |
655 | iscsit_start_nopin_timer(conn); | |
656 | } | |
657 | ||
e5419865 | 658 | int iscsit_start_kthreads(struct iscsi_conn *conn) |
88dcd2da NB |
659 | { |
660 | int ret = 0; | |
661 | ||
662 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
663 | conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, | |
664 | ISCSIT_BITMAP_BITS, get_order(1)); | |
665 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
666 | ||
667 | if (conn->bitmap_id < 0) { | |
668 | pr_err("bitmap_find_free_region() failed for" | |
669 | " iscsit_start_kthreads()\n"); | |
670 | return -ENOMEM; | |
671 | } | |
672 | ||
673 | conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, | |
674 | "%s", ISCSI_TX_THREAD_NAME); | |
675 | if (IS_ERR(conn->tx_thread)) { | |
676 | pr_err("Unable to start iscsi_target_tx_thread\n"); | |
677 | ret = PTR_ERR(conn->tx_thread); | |
678 | goto out_bitmap; | |
679 | } | |
680 | conn->tx_thread_active = true; | |
681 | ||
682 | conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, | |
683 | "%s", ISCSI_RX_THREAD_NAME); | |
684 | if (IS_ERR(conn->rx_thread)) { | |
685 | pr_err("Unable to start iscsi_target_rx_thread\n"); | |
686 | ret = PTR_ERR(conn->rx_thread); | |
687 | goto out_tx; | |
688 | } | |
689 | conn->rx_thread_active = true; | |
690 | ||
691 | return 0; | |
692 | out_tx: | |
e5419865 | 693 | send_sig(SIGINT, conn->tx_thread, 1); |
88dcd2da NB |
694 | kthread_stop(conn->tx_thread); |
695 | conn->tx_thread_active = false; | |
696 | out_bitmap: | |
697 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
698 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
699 | get_order(1)); | |
700 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
701 | return ret; | |
702 | } | |
703 | ||
e5419865 | 704 | void iscsi_post_login_handler( |
e48354ce NB |
705 | struct iscsi_np *np, |
706 | struct iscsi_conn *conn, | |
707 | u8 zero_tsih) | |
708 | { | |
709 | int stop_timer = 0; | |
710 | struct iscsi_session *sess = conn->sess; | |
711 | struct se_session *se_sess = sess->se_sess; | |
60bfcf8e | 712 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce | 713 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
e48354ce NB |
714 | |
715 | iscsit_inc_conn_usage_count(conn); | |
716 | ||
717 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, | |
718 | ISCSI_LOGIN_STATUS_ACCEPT); | |
719 | ||
720 | pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); | |
721 | conn->conn_state = TARG_CONN_STATE_LOGGED_IN; | |
722 | ||
723 | iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); | |
e48354ce NB |
724 | /* |
725 | * SCSI Initiator -> SCSI Target Port Mapping | |
726 | */ | |
e48354ce NB |
727 | if (!zero_tsih) { |
728 | iscsi_set_session_parameters(sess->sess_ops, | |
729 | conn->param_list, 0); | |
730 | iscsi_release_param_list(conn->param_list); | |
731 | conn->param_list = NULL; | |
732 | ||
733 | spin_lock_bh(&sess->conn_lock); | |
734 | atomic_set(&sess->session_continuation, 0); | |
735 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
736 | pr_debug("Moving to" | |
737 | " TARG_SESS_STATE_LOGGED_IN.\n"); | |
738 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
739 | stop_timer = 1; | |
740 | } | |
741 | ||
dc58f760 AG |
742 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" |
743 | " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, | |
69d75574 | 744 | &conn->local_sockaddr, tpg->tpgt); |
e48354ce NB |
745 | |
746 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
747 | atomic_inc(&sess->nconn); | |
748 | pr_debug("Incremented iSCSI Connection count to %hu" | |
749 | " from node: %s\n", atomic_read(&sess->nconn), | |
750 | sess->sess_ops->InitiatorName); | |
751 | spin_unlock_bh(&sess->conn_lock); | |
752 | ||
88dcd2da | 753 | iscsi_post_login_start_timers(conn); |
e48354ce NB |
754 | /* |
755 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
756 | * are scheduled on the same CPU. | |
757 | */ | |
758 | iscsit_thread_get_cpumask(conn); | |
759 | conn->conn_rx_reset_cpumask = 1; | |
760 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
761 | /* |
762 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
763 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
764 | */ | |
765 | complete(&conn->rx_login_comp); | |
e48354ce | 766 | iscsit_dec_conn_usage_count(conn); |
e5419865 | 767 | |
e48354ce NB |
768 | if (stop_timer) { |
769 | spin_lock_bh(&se_tpg->session_lock); | |
770 | iscsit_stop_time2retain_timer(sess); | |
771 | spin_unlock_bh(&se_tpg->session_lock); | |
772 | } | |
773 | iscsit_dec_session_usage_count(sess); | |
e5419865 | 774 | return; |
e48354ce NB |
775 | } |
776 | ||
777 | iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); | |
778 | iscsi_release_param_list(conn->param_list); | |
779 | conn->param_list = NULL; | |
780 | ||
781 | iscsit_determine_maxcmdsn(sess); | |
782 | ||
783 | spin_lock_bh(&se_tpg->session_lock); | |
784 | __transport_register_session(&sess->tpg->tpg_se_tpg, | |
8359cf43 | 785 | se_sess->se_node_acl, se_sess, sess); |
e48354ce NB |
786 | pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
787 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
788 | ||
dc58f760 AG |
789 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", |
790 | conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, | |
2f9bc894 | 791 | tpg->tpgt); |
e48354ce NB |
792 | |
793 | spin_lock_bh(&sess->conn_lock); | |
794 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
795 | atomic_inc(&sess->nconn); | |
796 | pr_debug("Incremented iSCSI Connection count to %hu from node:" | |
797 | " %s\n", atomic_read(&sess->nconn), | |
798 | sess->sess_ops->InitiatorName); | |
799 | spin_unlock_bh(&sess->conn_lock); | |
800 | ||
801 | sess->sid = tpg->sid++; | |
802 | if (!sess->sid) | |
803 | sess->sid = tpg->sid++; | |
804 | pr_debug("Established iSCSI session from node: %s\n", | |
805 | sess->sess_ops->InitiatorName); | |
806 | ||
807 | tpg->nsessions++; | |
808 | if (tpg->tpg_tiqn) | |
809 | tpg->tpg_tiqn->tiqn_nsessions++; | |
810 | ||
811 | pr_debug("Incremented number of active iSCSI sessions to %u on" | |
812 | " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); | |
813 | spin_unlock_bh(&se_tpg->session_lock); | |
814 | ||
815 | iscsi_post_login_start_timers(conn); | |
e48354ce NB |
816 | /* |
817 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
818 | * are scheduled on the same CPU. | |
819 | */ | |
820 | iscsit_thread_get_cpumask(conn); | |
821 | conn->conn_rx_reset_cpumask = 1; | |
822 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
823 | /* |
824 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
825 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
826 | */ | |
827 | complete(&conn->rx_login_comp); | |
e48354ce | 828 | iscsit_dec_conn_usage_count(conn); |
e48354ce NB |
829 | } |
830 | ||
831 | static void iscsi_handle_login_thread_timeout(unsigned long data) | |
832 | { | |
833 | struct iscsi_np *np = (struct iscsi_np *) data; | |
834 | ||
835 | spin_lock_bh(&np->np_thread_lock); | |
69d75574 AG |
836 | pr_err("iSCSI Login timeout on Network Portal %pISpc\n", |
837 | &np->np_sockaddr); | |
e48354ce NB |
838 | |
839 | if (np->np_login_timer_flags & ISCSI_TF_STOP) { | |
840 | spin_unlock_bh(&np->np_thread_lock); | |
841 | return; | |
842 | } | |
843 | ||
844 | if (np->np_thread) | |
845 | send_sig(SIGINT, np->np_thread, 1); | |
846 | ||
847 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
848 | spin_unlock_bh(&np->np_thread_lock); | |
849 | } | |
850 | ||
851 | static void iscsi_start_login_thread_timer(struct iscsi_np *np) | |
852 | { | |
853 | /* | |
854 | * This used the TA_LOGIN_TIMEOUT constant because at this | |
855 | * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout | |
856 | */ | |
857 | spin_lock_bh(&np->np_thread_lock); | |
858 | init_timer(&np->np_login_timer); | |
859 | np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); | |
860 | np->np_login_timer.data = (unsigned long)np; | |
861 | np->np_login_timer.function = iscsi_handle_login_thread_timeout; | |
862 | np->np_login_timer_flags &= ~ISCSI_TF_STOP; | |
863 | np->np_login_timer_flags |= ISCSI_TF_RUNNING; | |
864 | add_timer(&np->np_login_timer); | |
865 | ||
866 | pr_debug("Added timeout timer to iSCSI login request for" | |
867 | " %u seconds.\n", TA_LOGIN_TIMEOUT); | |
868 | spin_unlock_bh(&np->np_thread_lock); | |
869 | } | |
870 | ||
871 | static void iscsi_stop_login_thread_timer(struct iscsi_np *np) | |
872 | { | |
873 | spin_lock_bh(&np->np_thread_lock); | |
874 | if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { | |
875 | spin_unlock_bh(&np->np_thread_lock); | |
876 | return; | |
877 | } | |
878 | np->np_login_timer_flags |= ISCSI_TF_STOP; | |
879 | spin_unlock_bh(&np->np_thread_lock); | |
880 | ||
881 | del_timer_sync(&np->np_login_timer); | |
882 | ||
883 | spin_lock_bh(&np->np_thread_lock); | |
884 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
885 | spin_unlock_bh(&np->np_thread_lock); | |
886 | } | |
887 | ||
baa4d64b | 888 | int iscsit_setup_np( |
e48354ce | 889 | struct iscsi_np *np, |
13a3cf08 | 890 | struct sockaddr_storage *sockaddr) |
e48354ce | 891 | { |
baa4d64b | 892 | struct socket *sock = NULL; |
837f6452 | 893 | int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; |
e48354ce NB |
894 | |
895 | switch (np->np_network_transport) { | |
896 | case ISCSI_TCP: | |
897 | np->np_ip_proto = IPPROTO_TCP; | |
898 | np->np_sock_type = SOCK_STREAM; | |
899 | break; | |
900 | case ISCSI_SCTP_TCP: | |
901 | np->np_ip_proto = IPPROTO_SCTP; | |
902 | np->np_sock_type = SOCK_STREAM; | |
903 | break; | |
904 | case ISCSI_SCTP_UDP: | |
905 | np->np_ip_proto = IPPROTO_SCTP; | |
906 | np->np_sock_type = SOCK_SEQPACKET; | |
907 | break; | |
e48354ce NB |
908 | default: |
909 | pr_err("Unsupported network_transport: %d\n", | |
910 | np->np_network_transport); | |
911 | return -EINVAL; | |
912 | } | |
913 | ||
baa4d64b NB |
914 | np->np_ip_proto = IPPROTO_TCP; |
915 | np->np_sock_type = SOCK_STREAM; | |
916 | ||
e48354ce NB |
917 | ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
918 | np->np_ip_proto, &sock); | |
919 | if (ret < 0) { | |
920 | pr_err("sock_create() failed.\n"); | |
921 | return ret; | |
922 | } | |
923 | np->np_socket = sock; | |
e48354ce NB |
924 | /* |
925 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
926 | * in iscsi_target_configfs.c code.. | |
927 | */ | |
8359cf43 | 928 | memcpy(&np->np_sockaddr, sockaddr, |
13a3cf08 | 929 | sizeof(struct sockaddr_storage)); |
e48354ce NB |
930 | |
931 | if (sockaddr->ss_family == AF_INET6) | |
932 | len = sizeof(struct sockaddr_in6); | |
933 | else | |
934 | len = sizeof(struct sockaddr_in); | |
935 | /* | |
936 | * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. | |
937 | */ | |
8359cf43 | 938 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
939 | opt = 1; |
940 | if (np->np_network_transport == ISCSI_TCP) { | |
941 | ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, | |
942 | (char *)&opt, sizeof(opt)); | |
943 | if (ret < 0) { | |
944 | pr_err("kernel_setsockopt() for TCP_NODELAY" | |
945 | " failed: %d\n", ret); | |
946 | goto fail; | |
947 | } | |
948 | } | |
949 | ||
8359cf43 | 950 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
951 | ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
952 | (char *)&opt, sizeof(opt)); | |
953 | if (ret < 0) { | |
954 | pr_err("kernel_setsockopt() for SO_REUSEADDR" | |
955 | " failed\n"); | |
956 | goto fail; | |
957 | } | |
958 | ||
9f9ef6d3 DK |
959 | ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
960 | (char *)&opt, sizeof(opt)); | |
961 | if (ret < 0) { | |
962 | pr_err("kernel_setsockopt() for IP_FREEBIND" | |
963 | " failed\n"); | |
964 | goto fail; | |
965 | } | |
966 | ||
e48354ce NB |
967 | ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
968 | if (ret < 0) { | |
969 | pr_err("kernel_bind() failed: %d\n", ret); | |
970 | goto fail; | |
971 | } | |
972 | ||
973 | ret = kernel_listen(sock, backlog); | |
974 | if (ret != 0) { | |
975 | pr_err("kernel_listen() failed: %d\n", ret); | |
976 | goto fail; | |
977 | } | |
978 | ||
979 | return 0; | |
e48354ce NB |
980 | fail: |
981 | np->np_socket = NULL; | |
94e16e9c | 982 | sock_release(sock); |
e48354ce NB |
983 | return ret; |
984 | } | |
985 | ||
baa4d64b NB |
986 | int iscsi_target_setup_login_socket( |
987 | struct iscsi_np *np, | |
13a3cf08 | 988 | struct sockaddr_storage *sockaddr) |
baa4d64b NB |
989 | { |
990 | struct iscsit_transport *t; | |
991 | int rc; | |
992 | ||
993 | t = iscsit_get_transport(np->np_network_transport); | |
994 | if (!t) | |
995 | return -EINVAL; | |
996 | ||
997 | rc = t->iscsit_setup_np(np, sockaddr); | |
998 | if (rc < 0) { | |
999 | iscsit_put_transport(t); | |
1000 | return rc; | |
1001 | } | |
1002 | ||
1003 | np->np_transport = t; | |
14f4b54f | 1004 | np->enabled = true; |
baa4d64b NB |
1005 | return 0; |
1006 | } | |
1007 | ||
1008 | int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
1009 | { | |
1010 | struct socket *new_sock, *sock = np->np_socket; | |
1011 | struct sockaddr_in sock_in; | |
1012 | struct sockaddr_in6 sock_in6; | |
1013 | int rc, err; | |
1014 | ||
1015 | rc = kernel_accept(sock, &new_sock, 0); | |
1016 | if (rc < 0) | |
1017 | return rc; | |
1018 | ||
1019 | conn->sock = new_sock; | |
1020 | conn->login_family = np->np_sockaddr.ss_family; | |
baa4d64b NB |
1021 | |
1022 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
1023 | memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); | |
1024 | ||
1025 | rc = conn->sock->ops->getname(conn->sock, | |
1026 | (struct sockaddr *)&sock_in6, &err, 1); | |
1027 | if (!rc) { | |
dc58f760 AG |
1028 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1029 | memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1030 | } else { | |
1031 | /* Pretend to be an ipv4 socket */ | |
1032 | sock_in.sin_family = AF_INET; | |
1033 | sock_in.sin_port = sock_in6.sin6_port; | |
1034 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1035 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
1036 | } | |
baa4d64b NB |
1037 | } |
1038 | ||
1039 | rc = conn->sock->ops->getname(conn->sock, | |
1040 | (struct sockaddr *)&sock_in6, &err, 0); | |
1041 | if (!rc) { | |
69d75574 AG |
1042 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1043 | memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1044 | } else { | |
1045 | /* Pretend to be an ipv4 socket */ | |
1046 | sock_in.sin_family = AF_INET; | |
1047 | sock_in.sin_port = sock_in6.sin6_port; | |
1048 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1049 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
1050 | } | |
baa4d64b NB |
1051 | } |
1052 | } else { | |
1053 | memset(&sock_in, 0, sizeof(struct sockaddr_in)); | |
1054 | ||
1055 | rc = conn->sock->ops->getname(conn->sock, | |
1056 | (struct sockaddr *)&sock_in, &err, 1); | |
dc58f760 AG |
1057 | if (!rc) |
1058 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1059 | |
1060 | rc = conn->sock->ops->getname(conn->sock, | |
1061 | (struct sockaddr *)&sock_in, &err, 0); | |
69d75574 AG |
1062 | if (!rc) |
1063 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1064 | } |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
1070 | { | |
1071 | struct iscsi_login_req *login_req; | |
1072 | u32 padding = 0, payload_length; | |
1073 | ||
1074 | if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) | |
1075 | return -1; | |
1076 | ||
1077 | login_req = (struct iscsi_login_req *)login->req; | |
1078 | payload_length = ntoh24(login_req->dlength); | |
1079 | padding = ((-payload_length) & 3); | |
1080 | ||
1081 | pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," | |
1082 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", | |
1083 | login_req->flags, login_req->itt, login_req->cmdsn, | |
1084 | login_req->exp_statsn, login_req->cid, payload_length); | |
1085 | /* | |
1086 | * Setup the initial iscsi_login values from the leading | |
1087 | * login request PDU. | |
1088 | */ | |
1089 | if (login->first_request) { | |
1090 | login_req = (struct iscsi_login_req *)login->req; | |
1091 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
3e1c81a9 | 1092 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
baa4d64b NB |
1093 | login->version_min = login_req->min_version; |
1094 | login->version_max = login_req->max_version; | |
1095 | memcpy(login->isid, login_req->isid, 6); | |
1096 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1097 | login->init_task_tag = login_req->itt; | |
1098 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1099 | login->cid = be16_to_cpu(login_req->cid); | |
1100 | login->tsih = be16_to_cpu(login_req->tsih); | |
1101 | } | |
1102 | ||
1103 | if (iscsi_target_check_login_request(conn, login) < 0) | |
1104 | return -1; | |
1105 | ||
1106 | memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); | |
1107 | if (iscsi_login_rx_data(conn, login->req_buf, | |
1108 | payload_length + padding) < 0) | |
1109 | return -1; | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1115 | u32 length) | |
1116 | { | |
1117 | if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) | |
1118 | return -1; | |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | static int | |
1124 | iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) | |
1125 | { | |
1126 | int rc; | |
1127 | ||
1128 | if (!t->owner) { | |
1129 | conn->conn_transport = t; | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | rc = try_module_get(t->owner); | |
1134 | if (!rc) { | |
1135 | pr_err("try_module_get() failed for %s\n", t->name); | |
1136 | return -EINVAL; | |
1137 | } | |
1138 | ||
1139 | conn->conn_transport = t; | |
1140 | return 0; | |
1141 | } | |
1142 | ||
a91eb7d9 NB |
1143 | void iscsi_target_login_sess_out(struct iscsi_conn *conn, |
1144 | struct iscsi_np *np, bool zero_tsih, bool new_sess) | |
1145 | { | |
0bcc297e | 1146 | if (!new_sess) |
a91eb7d9 NB |
1147 | goto old_sess_out; |
1148 | ||
1149 | pr_err("iSCSI Login negotiation failed.\n"); | |
1150 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
1151 | ISCSI_LOGIN_STATUS_INIT_ERR); | |
1152 | if (!zero_tsih || !conn->sess) | |
1153 | goto old_sess_out; | |
1154 | if (conn->sess->se_sess) | |
1155 | transport_free_session(conn->sess->se_sess); | |
1156 | if (conn->sess->session_index != 0) { | |
1157 | spin_lock_bh(&sess_idr_lock); | |
1158 | idr_remove(&sess_idr, conn->sess->session_index); | |
1159 | spin_unlock_bh(&sess_idr_lock); | |
1160 | } | |
1161 | kfree(conn->sess->sess_ops); | |
1162 | kfree(conn->sess); | |
a0b3b9b2 | 1163 | conn->sess = NULL; |
a91eb7d9 NB |
1164 | |
1165 | old_sess_out: | |
1166 | iscsi_stop_login_thread_timer(np); | |
1167 | /* | |
1168 | * If login negotiation fails check if the Time2Retain timer | |
1169 | * needs to be restarted. | |
1170 | */ | |
1171 | if (!zero_tsih && conn->sess) { | |
1172 | spin_lock_bh(&conn->sess->conn_lock); | |
1173 | if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { | |
1174 | struct se_portal_group *se_tpg = | |
60bfcf8e | 1175 | &conn->tpg->tpg_se_tpg; |
a91eb7d9 NB |
1176 | |
1177 | atomic_set(&conn->sess->session_continuation, 0); | |
1178 | spin_unlock_bh(&conn->sess->conn_lock); | |
1179 | spin_lock_bh(&se_tpg->session_lock); | |
1180 | iscsit_start_time2retain_handler(conn->sess); | |
1181 | spin_unlock_bh(&se_tpg->session_lock); | |
1182 | } else | |
1183 | spin_unlock_bh(&conn->sess->conn_lock); | |
1184 | iscsit_dec_session_usage_count(conn->sess); | |
1185 | } | |
1186 | ||
69110e3c HX |
1187 | ahash_request_free(conn->conn_tx_hash); |
1188 | if (conn->conn_rx_hash) { | |
1189 | struct crypto_ahash *tfm; | |
1190 | ||
1191 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
1192 | ahash_request_free(conn->conn_rx_hash); | |
1193 | crypto_free_ahash(tfm); | |
1194 | } | |
a91eb7d9 | 1195 | |
fbecb659 | 1196 | free_cpumask_var(conn->conn_cpumask); |
a91eb7d9 NB |
1197 | |
1198 | kfree(conn->conn_ops); | |
1199 | ||
1200 | if (conn->param_list) { | |
1201 | iscsi_release_param_list(conn->param_list); | |
1202 | conn->param_list = NULL; | |
1203 | } | |
1204 | iscsi_target_nego_release(conn); | |
1205 | ||
1206 | if (conn->sock) { | |
1207 | sock_release(conn->sock); | |
1208 | conn->sock = NULL; | |
1209 | } | |
1210 | ||
954f2372 SG |
1211 | if (conn->conn_transport->iscsit_wait_conn) |
1212 | conn->conn_transport->iscsit_wait_conn(conn); | |
1213 | ||
a91eb7d9 NB |
1214 | if (conn->conn_transport->iscsit_free_conn) |
1215 | conn->conn_transport->iscsit_free_conn(conn); | |
1216 | ||
1217 | iscsit_put_transport(conn->conn_transport); | |
1218 | kfree(conn); | |
1219 | } | |
1220 | ||
e48354ce NB |
1221 | static int __iscsi_target_login_thread(struct iscsi_np *np) |
1222 | { | |
baa4d64b | 1223 | u8 *buffer, zero_tsih = 0; |
81a9c5e7 | 1224 | int ret = 0, rc; |
e48354ce NB |
1225 | struct iscsi_conn *conn = NULL; |
1226 | struct iscsi_login *login; | |
1227 | struct iscsi_portal_group *tpg = NULL; | |
e48354ce | 1228 | struct iscsi_login_req *pdu; |
a91eb7d9 NB |
1229 | struct iscsi_tpg_np *tpg_np; |
1230 | bool new_sess = false; | |
e48354ce NB |
1231 | |
1232 | flush_signals(current); | |
e48354ce NB |
1233 | |
1234 | spin_lock_bh(&np->np_thread_lock); | |
1235 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1236 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1237 | complete(&np->np_restart_comp); | |
81a9c5e7 MP |
1238 | } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { |
1239 | spin_unlock_bh(&np->np_thread_lock); | |
1240 | goto exit; | |
e48354ce NB |
1241 | } else { |
1242 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1243 | } | |
1244 | spin_unlock_bh(&np->np_thread_lock); | |
1245 | ||
e48354ce NB |
1246 | conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
1247 | if (!conn) { | |
1248 | pr_err("Could not allocate memory for" | |
1249 | " new connection\n"); | |
e48354ce NB |
1250 | /* Get another socket */ |
1251 | return 1; | |
1252 | } | |
e48354ce NB |
1253 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
1254 | conn->conn_state = TARG_CONN_STATE_FREE; | |
e48354ce | 1255 | |
baa4d64b NB |
1256 | if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
1257 | kfree(conn); | |
1258 | return 1; | |
1259 | } | |
e48354ce | 1260 | |
baa4d64b NB |
1261 | rc = np->np_transport->iscsit_accept_np(np, conn); |
1262 | if (rc == -ENOSYS) { | |
1263 | complete(&np->np_restart_comp); | |
1264 | iscsit_put_transport(conn->conn_transport); | |
1265 | kfree(conn); | |
1266 | conn = NULL; | |
1267 | goto exit; | |
1268 | } else if (rc < 0) { | |
1269 | spin_lock_bh(&np->np_thread_lock); | |
1270 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1271 | spin_unlock_bh(&np->np_thread_lock); | |
1272 | complete(&np->np_restart_comp); | |
c9a03c12 NB |
1273 | iscsit_put_transport(conn->conn_transport); |
1274 | kfree(conn); | |
1275 | conn = NULL; | |
baa4d64b NB |
1276 | /* Get another socket */ |
1277 | return 1; | |
1278 | } | |
1279 | spin_unlock_bh(&np->np_thread_lock); | |
1280 | iscsit_put_transport(conn->conn_transport); | |
1281 | kfree(conn); | |
1282 | conn = NULL; | |
1283 | goto out; | |
e48354ce NB |
1284 | } |
1285 | /* | |
1286 | * Perform the remaining iSCSI connection initialization items.. | |
1287 | */ | |
baa4d64b NB |
1288 | login = iscsi_login_init_conn(conn); |
1289 | if (!login) { | |
e48354ce NB |
1290 | goto new_sess_out; |
1291 | } | |
1292 | ||
baa4d64b | 1293 | iscsi_start_login_thread_timer(np); |
e48354ce | 1294 | |
baa4d64b NB |
1295 | pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
1296 | conn->conn_state = TARG_CONN_STATE_XPT_UP; | |
1297 | /* | |
1298 | * This will process the first login request + payload.. | |
1299 | */ | |
1300 | rc = np->np_transport->iscsit_get_login_rx(conn, login); | |
1301 | if (rc == 1) | |
1302 | return 1; | |
1303 | else if (rc < 0) | |
1304 | goto new_sess_out; | |
66c7db68 | 1305 | |
baa4d64b NB |
1306 | buffer = &login->req[0]; |
1307 | pdu = (struct iscsi_login_req *)buffer; | |
e48354ce NB |
1308 | /* |
1309 | * Used by iscsit_tx_login_rsp() for Login Resonses PDUs | |
1310 | * when Status-Class != 0. | |
1311 | */ | |
baa4d64b | 1312 | conn->login_itt = pdu->itt; |
e48354ce NB |
1313 | |
1314 | spin_lock_bh(&np->np_thread_lock); | |
1315 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
1316 | spin_unlock_bh(&np->np_thread_lock); | |
69d75574 AG |
1317 | pr_err("iSCSI Network Portal on %pISpc currently not" |
1318 | " active.\n", &np->np_sockaddr); | |
e48354ce NB |
1319 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
1320 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); | |
1321 | goto new_sess_out; | |
1322 | } | |
1323 | spin_unlock_bh(&np->np_thread_lock); | |
1324 | ||
e48354ce NB |
1325 | conn->network_transport = np->np_network_transport; |
1326 | ||
dc58f760 AG |
1327 | pr_debug("Received iSCSI login request from %pISpc on %s Network" |
1328 | " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, | |
69d75574 | 1329 | &conn->local_sockaddr); |
e48354ce NB |
1330 | |
1331 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); | |
1332 | conn->conn_state = TARG_CONN_STATE_IN_LOGIN; | |
1333 | ||
1334 | if (iscsi_login_check_initiator_version(conn, pdu->max_version, | |
1335 | pdu->min_version) < 0) | |
1336 | goto new_sess_out; | |
1337 | ||
1338 | zero_tsih = (pdu->tsih == 0x0000); | |
ee1b1b9c | 1339 | if (zero_tsih) { |
e48354ce NB |
1340 | /* |
1341 | * This is the leading connection of a new session. | |
1342 | * We wait until after authentication to check for | |
1343 | * session reinstatement. | |
1344 | */ | |
1345 | if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) | |
1346 | goto new_sess_out; | |
1347 | } else { | |
1348 | /* | |
1349 | * Add a new connection to an existing session. | |
1350 | * We check for a non-existant session in | |
1351 | * iscsi_login_non_zero_tsih_s2() below based | |
1352 | * on ISID/TSIH, but wait until after authentication | |
1353 | * to check for connection reinstatement, etc. | |
1354 | */ | |
1355 | if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) | |
1356 | goto new_sess_out; | |
1357 | } | |
e48354ce | 1358 | /* |
baa4d64b NB |
1359 | * SessionType: Discovery |
1360 | * | |
1361 | * Locates Default Portal | |
1362 | * | |
1363 | * SessionType: Normal | |
1364 | * | |
1365 | * Locates Target Portal from NP -> Target IQN | |
e48354ce | 1366 | */ |
baa4d64b NB |
1367 | rc = iscsi_target_locate_portal(np, conn, login); |
1368 | if (rc < 0) { | |
e48354ce NB |
1369 | tpg = conn->tpg; |
1370 | goto new_sess_out; | |
1371 | } | |
a91eb7d9 | 1372 | login->zero_tsih = zero_tsih; |
e48354ce | 1373 | |
23a548ee SG |
1374 | conn->sess->se_sess->sup_prot_ops = |
1375 | conn->conn_transport->iscsit_get_sup_prot_ops(conn); | |
1376 | ||
e48354ce NB |
1377 | tpg = conn->tpg; |
1378 | if (!tpg) { | |
1379 | pr_err("Unable to locate struct iscsi_conn->tpg\n"); | |
1380 | goto new_sess_out; | |
1381 | } | |
1382 | ||
1383 | if (zero_tsih) { | |
baa4d64b | 1384 | if (iscsi_login_zero_tsih_s2(conn) < 0) |
e48354ce | 1385 | goto new_sess_out; |
e48354ce | 1386 | } else { |
baa4d64b | 1387 | if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
e48354ce | 1388 | goto old_sess_out; |
e48354ce NB |
1389 | } |
1390 | ||
42bc3e57 VP |
1391 | if (conn->conn_transport->iscsit_validate_params) { |
1392 | ret = conn->conn_transport->iscsit_validate_params(conn); | |
1393 | if (ret < 0) { | |
1394 | if (zero_tsih) | |
1395 | goto new_sess_out; | |
1396 | else | |
1397 | goto old_sess_out; | |
1398 | } | |
1399 | } | |
1400 | ||
a91eb7d9 NB |
1401 | ret = iscsi_target_start_negotiation(login, conn); |
1402 | if (ret < 0) | |
e48354ce NB |
1403 | goto new_sess_out; |
1404 | ||
e48354ce NB |
1405 | iscsi_stop_login_thread_timer(np); |
1406 | ||
a91eb7d9 NB |
1407 | if (ret == 1) { |
1408 | tpg_np = conn->tpg_np; | |
e48354ce | 1409 | |
e5419865 | 1410 | iscsi_post_login_handler(np, conn, zero_tsih); |
a91eb7d9 NB |
1411 | iscsit_deaccess_np(np, tpg, tpg_np); |
1412 | } | |
e48354ce | 1413 | |
e48354ce | 1414 | tpg = NULL; |
a91eb7d9 | 1415 | tpg_np = NULL; |
e48354ce NB |
1416 | /* Get another socket */ |
1417 | return 1; | |
1418 | ||
1419 | new_sess_out: | |
a91eb7d9 | 1420 | new_sess = true; |
e48354ce | 1421 | old_sess_out: |
a91eb7d9 NB |
1422 | tpg_np = conn->tpg_np; |
1423 | iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); | |
1424 | new_sess = false; | |
e48354ce NB |
1425 | |
1426 | if (tpg) { | |
a91eb7d9 | 1427 | iscsit_deaccess_np(np, tpg, tpg_np); |
e48354ce | 1428 | tpg = NULL; |
a91eb7d9 | 1429 | tpg_np = NULL; |
e48354ce NB |
1430 | } |
1431 | ||
1432 | out: | |
81a9c5e7 MP |
1433 | return 1; |
1434 | ||
baa4d64b | 1435 | exit: |
e48354ce NB |
1436 | iscsi_stop_login_thread_timer(np); |
1437 | spin_lock_bh(&np->np_thread_lock); | |
1438 | np->np_thread_state = ISCSI_NP_THREAD_EXIT; | |
1439 | spin_unlock_bh(&np->np_thread_lock); | |
baa4d64b | 1440 | |
e48354ce NB |
1441 | return 0; |
1442 | } | |
1443 | ||
1444 | int iscsi_target_login_thread(void *arg) | |
1445 | { | |
8359cf43 | 1446 | struct iscsi_np *np = arg; |
e48354ce NB |
1447 | int ret; |
1448 | ||
1449 | allow_signal(SIGINT); | |
1450 | ||
81a9c5e7 | 1451 | while (1) { |
e48354ce NB |
1452 | ret = __iscsi_target_login_thread(np); |
1453 | /* | |
1454 | * We break and exit here unless another sock_accept() call | |
1455 | * is expected. | |
1456 | */ | |
1457 | if (ret != 1) | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | return 0; | |
1462 | } |