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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> |
da5df620 | 20 | #include <linux/module.h> |
e48354ce NB |
21 | #include <linux/string.h> |
22 | #include <linux/kthread.h> | |
3f07c014 | 23 | #include <linux/sched/signal.h> |
40401530 | 24 | #include <linux/idr.h> |
8dcf07be BVA |
25 | #include <linux/tcp.h> /* TCP_NODELAY */ |
26 | #include <net/ipv6.h> /* ipv6_addr_v4mapped() */ | |
e48354ce NB |
27 | #include <scsi/iscsi_proto.h> |
28 | #include <target/target_core_base.h> | |
c4795fb2 | 29 | #include <target/target_core_fabric.h> |
e48354ce | 30 | |
67f091f2 SG |
31 | #include <target/iscsi/iscsi_target_core.h> |
32 | #include <target/iscsi/iscsi_target_stat.h> | |
e48354ce NB |
33 | #include "iscsi_target_device.h" |
34 | #include "iscsi_target_nego.h" | |
35 | #include "iscsi_target_erl0.h" | |
36 | #include "iscsi_target_erl2.h" | |
37 | #include "iscsi_target_login.h" | |
e48354ce NB |
38 | #include "iscsi_target_tpg.h" |
39 | #include "iscsi_target_util.h" | |
40 | #include "iscsi_target.h" | |
41 | #include "iscsi_target_parameters.h" | |
42 | ||
baa4d64b NB |
43 | #include <target/iscsi/iscsi_transport.h> |
44 | ||
45 | static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) | |
e48354ce | 46 | { |
baa4d64b NB |
47 | struct iscsi_login *login; |
48 | ||
49 | login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); | |
50 | if (!login) { | |
51 | pr_err("Unable to allocate memory for struct iscsi_login.\n"); | |
52 | return NULL; | |
53 | } | |
a91eb7d9 | 54 | conn->login = login; |
baa4d64b NB |
55 | login->conn = conn; |
56 | login->first_request = 1; | |
57 | ||
58 | login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
59 | if (!login->req_buf) { | |
60 | pr_err("Unable to allocate memory for response buffer.\n"); | |
61 | goto out_login; | |
62 | } | |
63 | ||
64 | login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
65 | if (!login->rsp_buf) { | |
66 | pr_err("Unable to allocate memory for request buffer.\n"); | |
67 | goto out_req_buf; | |
68 | } | |
69 | ||
70 | conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); | |
71 | if (!conn->conn_ops) { | |
72 | pr_err("Unable to allocate memory for" | |
73 | " struct iscsi_conn_ops.\n"); | |
74 | goto out_rsp_buf; | |
75 | } | |
76 | ||
d5627acb | 77 | init_waitqueue_head(&conn->queues_wq); |
e48354ce NB |
78 | INIT_LIST_HEAD(&conn->conn_list); |
79 | INIT_LIST_HEAD(&conn->conn_cmd_list); | |
80 | INIT_LIST_HEAD(&conn->immed_queue_list); | |
81 | INIT_LIST_HEAD(&conn->response_queue_list); | |
82 | init_completion(&conn->conn_post_wait_comp); | |
83 | init_completion(&conn->conn_wait_comp); | |
84 | init_completion(&conn->conn_wait_rcfr_comp); | |
85 | init_completion(&conn->conn_waiting_on_uc_comp); | |
86 | init_completion(&conn->conn_logout_comp); | |
87 | init_completion(&conn->rx_half_close_comp); | |
88 | init_completion(&conn->tx_half_close_comp); | |
e5419865 | 89 | init_completion(&conn->rx_login_comp); |
e48354ce NB |
90 | spin_lock_init(&conn->cmd_lock); |
91 | spin_lock_init(&conn->conn_usage_lock); | |
92 | spin_lock_init(&conn->immed_queue_lock); | |
93 | spin_lock_init(&conn->nopin_timer_lock); | |
94 | spin_lock_init(&conn->response_queue_lock); | |
95 | spin_lock_init(&conn->state_lock); | |
96 | ||
97 | if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { | |
98 | pr_err("Unable to allocate conn->conn_cpumask\n"); | |
baa4d64b | 99 | goto out_conn_ops; |
e48354ce | 100 | } |
baa4d64b | 101 | conn->conn_login = login; |
e48354ce | 102 | |
baa4d64b NB |
103 | return login; |
104 | ||
105 | out_conn_ops: | |
106 | kfree(conn->conn_ops); | |
107 | out_rsp_buf: | |
108 | kfree(login->rsp_buf); | |
109 | out_req_buf: | |
110 | kfree(login->req_buf); | |
111 | out_login: | |
112 | kfree(login); | |
113 | return NULL; | |
e48354ce NB |
114 | } |
115 | ||
116 | /* | |
117 | * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup | |
118 | * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel | |
119 | */ | |
120 | int iscsi_login_setup_crypto(struct iscsi_conn *conn) | |
121 | { | |
69110e3c HX |
122 | struct crypto_ahash *tfm; |
123 | ||
e48354ce NB |
124 | /* |
125 | * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts | |
126 | * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback | |
127 | * to software 1x8 byte slicing from crc32c.ko | |
128 | */ | |
69110e3c HX |
129 | tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); |
130 | if (IS_ERR(tfm)) { | |
131 | pr_err("crypto_alloc_ahash() failed\n"); | |
e48354ce NB |
132 | return -ENOMEM; |
133 | } | |
134 | ||
69110e3c HX |
135 | conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL); |
136 | if (!conn->conn_rx_hash) { | |
137 | pr_err("ahash_request_alloc() failed for conn_rx_hash\n"); | |
138 | crypto_free_ahash(tfm); | |
139 | return -ENOMEM; | |
140 | } | |
141 | ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL); | |
142 | ||
143 | conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL); | |
144 | if (!conn->conn_tx_hash) { | |
145 | pr_err("ahash_request_alloc() failed for conn_tx_hash\n"); | |
146 | ahash_request_free(conn->conn_rx_hash); | |
147 | conn->conn_rx_hash = NULL; | |
148 | crypto_free_ahash(tfm); | |
e48354ce NB |
149 | return -ENOMEM; |
150 | } | |
69110e3c | 151 | ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); |
e48354ce NB |
152 | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static int iscsi_login_check_initiator_version( | |
157 | struct iscsi_conn *conn, | |
158 | u8 version_max, | |
159 | u8 version_min) | |
160 | { | |
161 | if ((version_max != 0x00) || (version_min != 0x00)) { | |
162 | pr_err("Unsupported iSCSI IETF Pre-RFC Revision," | |
163 | " version Min/Max 0x%02x/0x%02x, rejecting login.\n", | |
164 | version_min, version_max); | |
165 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
166 | ISCSI_LOGIN_STATUS_NO_VERSION); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) | |
174 | { | |
175 | int sessiontype; | |
176 | struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; | |
177 | struct iscsi_portal_group *tpg = conn->tpg; | |
178 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
179 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
180 | struct se_session *se_sess, *se_sess_tmp; | |
181 | ||
182 | initiatorname_param = iscsi_find_param_from_key( | |
183 | INITIATORNAME, conn->param_list); | |
e48354ce NB |
184 | sessiontype_param = iscsi_find_param_from_key( |
185 | SESSIONTYPE, conn->param_list); | |
1c5c12c6 RD |
186 | if (!initiatorname_param || !sessiontype_param) { |
187 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
188 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); | |
e48354ce | 189 | return -1; |
1c5c12c6 | 190 | } |
e48354ce NB |
191 | |
192 | sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; | |
193 | ||
194 | spin_lock_bh(&se_tpg->session_lock); | |
195 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
196 | sess_list) { | |
197 | ||
8359cf43 | 198 | sess_p = se_sess->fabric_sess_ptr; |
e48354ce NB |
199 | spin_lock(&sess_p->conn_lock); |
200 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
201 | atomic_read(&sess_p->session_logout) || | |
202 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
203 | spin_unlock(&sess_p->conn_lock); | |
204 | continue; | |
205 | } | |
8359cf43 JE |
206 | if (!memcmp(sess_p->isid, conn->sess->isid, 6) && |
207 | (!strcmp(sess_p->sess_ops->InitiatorName, | |
208 | initiatorname_param->value) && | |
e48354ce NB |
209 | (sess_p->sess_ops->SessionType == sessiontype))) { |
210 | atomic_set(&sess_p->session_reinstatement, 1); | |
211 | spin_unlock(&sess_p->conn_lock); | |
212 | iscsit_inc_session_usage_count(sess_p); | |
213 | iscsit_stop_time2retain_timer(sess_p); | |
214 | sess = sess_p; | |
215 | break; | |
216 | } | |
217 | spin_unlock(&sess_p->conn_lock); | |
218 | } | |
219 | spin_unlock_bh(&se_tpg->session_lock); | |
220 | /* | |
221 | * If the Time2Retain handler has expired, the session is already gone. | |
222 | */ | |
223 | if (!sess) | |
224 | return 0; | |
225 | ||
226 | pr_debug("%s iSCSI Session SID %u is still active for %s," | |
0d5efb8a | 227 | " performing session reinstatement.\n", (sessiontype) ? |
e48354ce NB |
228 | "Discovery" : "Normal", sess->sid, |
229 | sess->sess_ops->InitiatorName); | |
230 | ||
231 | spin_lock_bh(&sess->conn_lock); | |
232 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
233 | spin_unlock_bh(&sess->conn_lock); | |
234 | iscsit_dec_session_usage_count(sess); | |
44f33d0f | 235 | iscsit_close_session(sess); |
99367f01 | 236 | return 0; |
e48354ce NB |
237 | } |
238 | spin_unlock_bh(&sess->conn_lock); | |
239 | ||
240 | iscsit_stop_session(sess, 1, 1); | |
241 | iscsit_dec_session_usage_count(sess); | |
242 | ||
44f33d0f | 243 | iscsit_close_session(sess); |
99367f01 | 244 | return 0; |
e48354ce NB |
245 | } |
246 | ||
247 | static void iscsi_login_set_conn_values( | |
248 | struct iscsi_session *sess, | |
249 | struct iscsi_conn *conn, | |
50e5c87d | 250 | __be16 cid) |
e48354ce NB |
251 | { |
252 | conn->sess = sess; | |
50e5c87d | 253 | conn->cid = be16_to_cpu(cid); |
e48354ce NB |
254 | /* |
255 | * Generate a random Status sequence number (statsn) for the new | |
256 | * iSCSI connection. | |
257 | */ | |
258 | get_random_bytes(&conn->stat_sn, sizeof(u32)); | |
259 | ||
260 | mutex_lock(&auth_id_lock); | |
261 | conn->auth_id = iscsit_global->auth_id++; | |
262 | mutex_unlock(&auth_id_lock); | |
263 | } | |
264 | ||
d2faaefb | 265 | __printf(2, 3) int iscsi_change_param_sprintf( |
79d59d08 RD |
266 | struct iscsi_conn *conn, |
267 | const char *fmt, ...) | |
268 | { | |
269 | va_list args; | |
270 | unsigned char buf[64]; | |
271 | ||
272 | memset(buf, 0, sizeof buf); | |
273 | ||
274 | va_start(args, fmt); | |
275 | vsnprintf(buf, sizeof buf, fmt, args); | |
276 | va_end(args); | |
277 | ||
278 | if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { | |
279 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
280 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
281 | return -1; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
d2faaefb | 286 | EXPORT_SYMBOL(iscsi_change_param_sprintf); |
79d59d08 | 287 | |
e48354ce NB |
288 | /* |
289 | * This is the leading connection of a new session, | |
290 | * or session reinstatement. | |
291 | */ | |
292 | static int iscsi_login_zero_tsih_s1( | |
293 | struct iscsi_conn *conn, | |
294 | unsigned char *buf) | |
295 | { | |
296 | struct iscsi_session *sess = NULL; | |
297 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
13b5533a | 298 | int ret; |
e48354ce NB |
299 | |
300 | sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); | |
301 | if (!sess) { | |
302 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
303 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
304 | pr_err("Could not allocate memory for session\n"); | |
0957627a | 305 | return -ENOMEM; |
e48354ce NB |
306 | } |
307 | ||
308 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
309 | sess->init_task_tag = pdu->itt; | |
8359cf43 | 310 | memcpy(&sess->isid, pdu->isid, 6); |
50e5c87d | 311 | sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
e48354ce NB |
312 | INIT_LIST_HEAD(&sess->sess_conn_list); |
313 | INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); | |
314 | INIT_LIST_HEAD(&sess->cr_active_list); | |
315 | INIT_LIST_HEAD(&sess->cr_inactive_list); | |
316 | init_completion(&sess->async_msg_comp); | |
317 | init_completion(&sess->reinstatement_comp); | |
318 | init_completion(&sess->session_wait_comp); | |
319 | init_completion(&sess->session_waiting_on_uc_comp); | |
320 | mutex_init(&sess->cmdsn_mutex); | |
321 | spin_lock_init(&sess->conn_lock); | |
322 | spin_lock_init(&sess->cr_a_lock); | |
323 | spin_lock_init(&sess->cr_i_lock); | |
324 | spin_lock_init(&sess->session_usage_lock); | |
325 | spin_lock_init(&sess->ttt_lock); | |
326 | ||
c9365bd0 | 327 | idr_preload(GFP_KERNEL); |
998866b0 | 328 | spin_lock_bh(&sess_idr_lock); |
c9365bd0 TH |
329 | ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
330 | if (ret >= 0) | |
331 | sess->session_index = ret; | |
998866b0 | 332 | spin_unlock_bh(&sess_idr_lock); |
c9365bd0 | 333 | idr_preload_end(); |
e48354ce | 334 | |
13b5533a | 335 | if (ret < 0) { |
c9365bd0 | 336 | pr_err("idr_alloc() for sess_idr failed\n"); |
13b5533a BW |
337 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
338 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
339 | kfree(sess); | |
340 | return -ENOMEM; | |
341 | } | |
342 | ||
e48354ce | 343 | sess->creation_time = get_jiffies_64(); |
e48354ce NB |
344 | /* |
345 | * The FFP CmdSN window values will be allocated from the TPG's | |
346 | * Initiator Node's ACL once the login has been successfully completed. | |
347 | */ | |
109e2381 | 348 | atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); |
e48354ce NB |
349 | |
350 | sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); | |
351 | if (!sess->sess_ops) { | |
352 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
353 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
354 | pr_err("Unable to allocate memory for" | |
355 | " struct iscsi_sess_ops.\n"); | |
0957627a NB |
356 | kfree(sess); |
357 | return -ENOMEM; | |
e48354ce NB |
358 | } |
359 | ||
23a548ee | 360 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
0957627a | 361 | if (IS_ERR(sess->se_sess)) { |
e48354ce NB |
362 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
363 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
a928d28d | 364 | kfree(sess->sess_ops); |
0957627a NB |
365 | kfree(sess); |
366 | return -ENOMEM; | |
e48354ce NB |
367 | } |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | static int iscsi_login_zero_tsih_s2( | |
373 | struct iscsi_conn *conn) | |
374 | { | |
375 | struct iscsi_node_attrib *na; | |
376 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 377 | bool iser = false; |
e48354ce NB |
378 | |
379 | sess->tpg = conn->tpg; | |
380 | ||
381 | /* | |
382 | * Assign a new TPG Session Handle. Note this is protected with | |
383 | * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). | |
384 | */ | |
60bfcf8e | 385 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce | 386 | if (!sess->tsih) |
60bfcf8e | 387 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce NB |
388 | |
389 | /* | |
390 | * Create the default params from user defined values.. | |
391 | */ | |
392 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 393 | conn->tpg->param_list, 1) < 0) { |
e48354ce NB |
394 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
395 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
396 | return -1; | |
397 | } | |
398 | ||
03aa2070 NB |
399 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
400 | iser = true; | |
401 | ||
402 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
403 | |
404 | if (sess->sess_ops->SessionType) | |
405 | return iscsi_set_keys_irrelevant_for_discovery( | |
406 | conn->param_list); | |
407 | ||
408 | na = iscsit_tpg_get_node_attrib(sess); | |
409 | ||
410 | /* | |
411 | * Need to send TargetPortalGroupTag back in first login response | |
412 | * on any iSCSI connection where the Initiator provides TargetName. | |
413 | * See 5.3.1. Login Phase Start | |
414 | * | |
415 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
416 | */ | |
79d59d08 | 417 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 418 | return -1; |
e48354ce NB |
419 | |
420 | /* | |
421 | * Workaround for Initiators that have broken connection recovery logic. | |
422 | * | |
423 | * "We would really like to get rid of this." Linux-iSCSI.org team | |
424 | */ | |
79d59d08 | 425 | if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) |
e48354ce | 426 | return -1; |
e48354ce | 427 | |
03aa2070 NB |
428 | /* |
429 | * Set RDMAExtensions=Yes by default for iSER enabled network portals | |
430 | */ | |
431 | if (iser) { | |
432 | struct iscsi_param *param; | |
433 | unsigned long mrdsl, off; | |
434 | int rc; | |
435 | ||
79d59d08 | 436 | if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) |
03aa2070 | 437 | return -1; |
79d59d08 | 438 | |
03aa2070 NB |
439 | /* |
440 | * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for | |
3fc6a642 | 441 | * Immediate Data + Unsolicited Data-OUT if necessary.. |
03aa2070 NB |
442 | */ |
443 | param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", | |
444 | conn->param_list); | |
445 | if (!param) { | |
446 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
447 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
448 | return -1; | |
449 | } | |
57103d7f | 450 | rc = kstrtoul(param->value, 0, &mrdsl); |
03aa2070 NB |
451 | if (rc < 0) { |
452 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
453 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
454 | return -1; | |
455 | } | |
456 | off = mrdsl % PAGE_SIZE; | |
457 | if (!off) | |
52d0aa79 | 458 | goto check_prot; |
03aa2070 NB |
459 | |
460 | if (mrdsl < PAGE_SIZE) | |
461 | mrdsl = PAGE_SIZE; | |
462 | else | |
463 | mrdsl -= off; | |
464 | ||
465 | pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" | |
466 | " to PAGE_SIZE\n", mrdsl); | |
467 | ||
79d59d08 | 468 | if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) |
03aa2070 | 469 | return -1; |
52d0aa79 NB |
470 | /* |
471 | * ISER currently requires that ImmediateData + Unsolicited | |
472 | * Data be disabled when protection / signature MRs are enabled. | |
473 | */ | |
474 | check_prot: | |
475 | if (sess->se_sess->sup_prot_ops & | |
476 | (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | | |
477 | TARGET_PROT_DOUT_INSERT)) { | |
478 | ||
79d59d08 | 479 | if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) |
52d0aa79 | 480 | return -1; |
52d0aa79 | 481 | |
79d59d08 | 482 | if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) |
52d0aa79 | 483 | return -1; |
79d59d08 | 484 | |
52d0aa79 NB |
485 | pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" |
486 | " T10-PI enabled ISER session\n"); | |
487 | } | |
03aa2070 | 488 | } |
e48354ce NB |
489 | |
490 | return 0; | |
491 | } | |
492 | ||
e48354ce NB |
493 | static int iscsi_login_non_zero_tsih_s1( |
494 | struct iscsi_conn *conn, | |
495 | unsigned char *buf) | |
496 | { | |
497 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
498 | ||
499 | iscsi_login_set_conn_values(NULL, conn, pdu->cid); | |
500 | return 0; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Add a new connection to an existing session. | |
505 | */ | |
506 | static int iscsi_login_non_zero_tsih_s2( | |
507 | struct iscsi_conn *conn, | |
508 | unsigned char *buf) | |
509 | { | |
510 | struct iscsi_portal_group *tpg = conn->tpg; | |
511 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
512 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
513 | struct se_session *se_sess, *se_sess_tmp; | |
514 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
03aa2070 | 515 | bool iser = false; |
e48354ce NB |
516 | |
517 | spin_lock_bh(&se_tpg->session_lock); | |
518 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
519 | sess_list) { | |
520 | ||
521 | sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
522 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
523 | atomic_read(&sess_p->session_logout) || | |
524 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) | |
525 | continue; | |
8359cf43 | 526 | if (!memcmp(sess_p->isid, pdu->isid, 6) && |
50e5c87d | 527 | (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
e48354ce NB |
528 | iscsit_inc_session_usage_count(sess_p); |
529 | iscsit_stop_time2retain_timer(sess_p); | |
530 | sess = sess_p; | |
531 | break; | |
532 | } | |
533 | } | |
534 | spin_unlock_bh(&se_tpg->session_lock); | |
535 | ||
536 | /* | |
537 | * If the Time2Retain handler has expired, the session is already gone. | |
538 | */ | |
539 | if (!sess) { | |
540 | pr_err("Initiator attempting to add a connection to" | |
541 | " a non-existent session, rejecting iSCSI Login.\n"); | |
542 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
543 | ISCSI_LOGIN_STATUS_NO_SESSION); | |
544 | return -1; | |
545 | } | |
546 | ||
547 | /* | |
548 | * Stop the Time2Retain timer if this is a failed session, we restart | |
549 | * the timer if the login is not successful. | |
550 | */ | |
551 | spin_lock_bh(&sess->conn_lock); | |
552 | if (sess->session_state == TARG_SESS_STATE_FAILED) | |
553 | atomic_set(&sess->session_continuation, 1); | |
554 | spin_unlock_bh(&sess->conn_lock); | |
555 | ||
556 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
557 | ||
558 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 559 | conn->tpg->param_list, 0) < 0) { |
e48354ce NB |
560 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
561 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
562 | return -1; | |
563 | } | |
564 | ||
03aa2070 NB |
565 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
566 | iser = true; | |
567 | ||
568 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
569 | /* |
570 | * Need to send TargetPortalGroupTag back in first login response | |
571 | * on any iSCSI connection where the Initiator provides TargetName. | |
572 | * See 5.3.1. Login Phase Start | |
573 | * | |
574 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
575 | */ | |
79d59d08 | 576 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 577 | return -1; |
e48354ce | 578 | |
c04a6091 | 579 | return 0; |
e48354ce NB |
580 | } |
581 | ||
582 | int iscsi_login_post_auth_non_zero_tsih( | |
583 | struct iscsi_conn *conn, | |
584 | u16 cid, | |
585 | u32 exp_statsn) | |
586 | { | |
587 | struct iscsi_conn *conn_ptr = NULL; | |
588 | struct iscsi_conn_recovery *cr = NULL; | |
589 | struct iscsi_session *sess = conn->sess; | |
590 | ||
591 | /* | |
592 | * By following item 5 in the login table, if we have found | |
593 | * an existing ISID and a valid/existing TSIH and an existing | |
594 | * CID we do connection reinstatement. Currently we dont not | |
595 | * support it so we send back an non-zero status class to the | |
596 | * initiator and release the new connection. | |
597 | */ | |
598 | conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); | |
ee1b1b9c | 599 | if (conn_ptr) { |
e48354ce NB |
600 | pr_err("Connection exists with CID %hu for %s," |
601 | " performing connection reinstatement.\n", | |
602 | conn_ptr->cid, sess->sess_ops->InitiatorName); | |
603 | ||
604 | iscsit_connection_reinstatement_rcfr(conn_ptr); | |
605 | iscsit_dec_conn_usage_count(conn_ptr); | |
606 | } | |
607 | ||
608 | /* | |
609 | * Check for any connection recovery entires containing CID. | |
610 | * We use the original ExpStatSN sent in the first login request | |
611 | * to acknowledge commands for the failed connection. | |
612 | * | |
613 | * Also note that an explict logout may have already been sent, | |
614 | * but the response may not be sent due to additional connection | |
615 | * loss. | |
616 | */ | |
617 | if (sess->sess_ops->ErrorRecoveryLevel == 2) { | |
618 | cr = iscsit_get_inactive_connection_recovery_entry( | |
619 | sess, cid); | |
ee1b1b9c | 620 | if (cr) { |
e48354ce NB |
621 | pr_debug("Performing implicit logout" |
622 | " for connection recovery on CID: %hu\n", | |
623 | conn->cid); | |
624 | iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); | |
625 | } | |
626 | } | |
627 | ||
628 | /* | |
629 | * Else we follow item 4 from the login table in that we have | |
630 | * found an existing ISID and a valid/existing TSIH and a new | |
631 | * CID we go ahead and continue to add a new connection to the | |
632 | * session. | |
633 | */ | |
634 | pr_debug("Adding CID %hu to existing session for %s.\n", | |
635 | cid, sess->sess_ops->InitiatorName); | |
636 | ||
637 | if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { | |
638 | pr_err("Adding additional connection to this session" | |
639 | " would exceed MaxConnections %d, login failed.\n", | |
640 | sess->sess_ops->MaxConnections); | |
641 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
642 | ISCSI_LOGIN_STATUS_ISID_ERROR); | |
643 | return -1; | |
644 | } | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static void iscsi_post_login_start_timers(struct iscsi_conn *conn) | |
650 | { | |
651 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 652 | /* |
3fc6a642 | 653 | * FIXME: Unsolicited NopIN support for ISER |
03aa2070 NB |
654 | */ |
655 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) | |
656 | return; | |
e48354ce NB |
657 | |
658 | if (!sess->sess_ops->SessionType) | |
659 | iscsit_start_nopin_timer(conn); | |
660 | } | |
661 | ||
e5419865 | 662 | int iscsit_start_kthreads(struct iscsi_conn *conn) |
88dcd2da NB |
663 | { |
664 | int ret = 0; | |
665 | ||
666 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
667 | conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, | |
668 | ISCSIT_BITMAP_BITS, get_order(1)); | |
669 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
670 | ||
671 | if (conn->bitmap_id < 0) { | |
672 | pr_err("bitmap_find_free_region() failed for" | |
673 | " iscsit_start_kthreads()\n"); | |
674 | return -ENOMEM; | |
675 | } | |
676 | ||
677 | conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, | |
678 | "%s", ISCSI_TX_THREAD_NAME); | |
679 | if (IS_ERR(conn->tx_thread)) { | |
680 | pr_err("Unable to start iscsi_target_tx_thread\n"); | |
681 | ret = PTR_ERR(conn->tx_thread); | |
682 | goto out_bitmap; | |
683 | } | |
684 | conn->tx_thread_active = true; | |
685 | ||
686 | conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, | |
687 | "%s", ISCSI_RX_THREAD_NAME); | |
688 | if (IS_ERR(conn->rx_thread)) { | |
689 | pr_err("Unable to start iscsi_target_rx_thread\n"); | |
690 | ret = PTR_ERR(conn->rx_thread); | |
691 | goto out_tx; | |
692 | } | |
693 | conn->rx_thread_active = true; | |
694 | ||
695 | return 0; | |
696 | out_tx: | |
e5419865 | 697 | send_sig(SIGINT, conn->tx_thread, 1); |
88dcd2da NB |
698 | kthread_stop(conn->tx_thread); |
699 | conn->tx_thread_active = false; | |
700 | out_bitmap: | |
701 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
702 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
703 | get_order(1)); | |
704 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
705 | return ret; | |
706 | } | |
707 | ||
e5419865 | 708 | void iscsi_post_login_handler( |
e48354ce NB |
709 | struct iscsi_np *np, |
710 | struct iscsi_conn *conn, | |
711 | u8 zero_tsih) | |
712 | { | |
713 | int stop_timer = 0; | |
714 | struct iscsi_session *sess = conn->sess; | |
715 | struct se_session *se_sess = sess->se_sess; | |
60bfcf8e | 716 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce | 717 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
e48354ce NB |
718 | |
719 | iscsit_inc_conn_usage_count(conn); | |
720 | ||
721 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, | |
722 | ISCSI_LOGIN_STATUS_ACCEPT); | |
723 | ||
724 | pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); | |
725 | conn->conn_state = TARG_CONN_STATE_LOGGED_IN; | |
726 | ||
727 | iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); | |
e48354ce NB |
728 | /* |
729 | * SCSI Initiator -> SCSI Target Port Mapping | |
730 | */ | |
e48354ce NB |
731 | if (!zero_tsih) { |
732 | iscsi_set_session_parameters(sess->sess_ops, | |
733 | conn->param_list, 0); | |
734 | iscsi_release_param_list(conn->param_list); | |
735 | conn->param_list = NULL; | |
736 | ||
737 | spin_lock_bh(&sess->conn_lock); | |
738 | atomic_set(&sess->session_continuation, 0); | |
739 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
740 | pr_debug("Moving to" | |
741 | " TARG_SESS_STATE_LOGGED_IN.\n"); | |
742 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
743 | stop_timer = 1; | |
744 | } | |
745 | ||
dc58f760 AG |
746 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" |
747 | " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, | |
69d75574 | 748 | &conn->local_sockaddr, tpg->tpgt); |
e48354ce NB |
749 | |
750 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
751 | atomic_inc(&sess->nconn); | |
752 | pr_debug("Incremented iSCSI Connection count to %hu" | |
753 | " from node: %s\n", atomic_read(&sess->nconn), | |
754 | sess->sess_ops->InitiatorName); | |
755 | spin_unlock_bh(&sess->conn_lock); | |
756 | ||
88dcd2da | 757 | iscsi_post_login_start_timers(conn); |
e48354ce NB |
758 | /* |
759 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
760 | * are scheduled on the same CPU. | |
761 | */ | |
762 | iscsit_thread_get_cpumask(conn); | |
763 | conn->conn_rx_reset_cpumask = 1; | |
764 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
765 | /* |
766 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
767 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
768 | */ | |
769 | complete(&conn->rx_login_comp); | |
e48354ce | 770 | iscsit_dec_conn_usage_count(conn); |
e5419865 | 771 | |
e48354ce NB |
772 | if (stop_timer) { |
773 | spin_lock_bh(&se_tpg->session_lock); | |
774 | iscsit_stop_time2retain_timer(sess); | |
775 | spin_unlock_bh(&se_tpg->session_lock); | |
776 | } | |
777 | iscsit_dec_session_usage_count(sess); | |
e5419865 | 778 | return; |
e48354ce NB |
779 | } |
780 | ||
781 | iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); | |
782 | iscsi_release_param_list(conn->param_list); | |
783 | conn->param_list = NULL; | |
784 | ||
785 | iscsit_determine_maxcmdsn(sess); | |
786 | ||
787 | spin_lock_bh(&se_tpg->session_lock); | |
788 | __transport_register_session(&sess->tpg->tpg_se_tpg, | |
8359cf43 | 789 | se_sess->se_node_acl, se_sess, sess); |
e48354ce NB |
790 | pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
791 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
792 | ||
dc58f760 AG |
793 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", |
794 | conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, | |
2f9bc894 | 795 | tpg->tpgt); |
e48354ce NB |
796 | |
797 | spin_lock_bh(&sess->conn_lock); | |
798 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
799 | atomic_inc(&sess->nconn); | |
800 | pr_debug("Incremented iSCSI Connection count to %hu from node:" | |
801 | " %s\n", atomic_read(&sess->nconn), | |
802 | sess->sess_ops->InitiatorName); | |
803 | spin_unlock_bh(&sess->conn_lock); | |
804 | ||
805 | sess->sid = tpg->sid++; | |
806 | if (!sess->sid) | |
807 | sess->sid = tpg->sid++; | |
808 | pr_debug("Established iSCSI session from node: %s\n", | |
809 | sess->sess_ops->InitiatorName); | |
810 | ||
811 | tpg->nsessions++; | |
812 | if (tpg->tpg_tiqn) | |
813 | tpg->tpg_tiqn->tiqn_nsessions++; | |
814 | ||
815 | pr_debug("Incremented number of active iSCSI sessions to %u on" | |
816 | " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); | |
817 | spin_unlock_bh(&se_tpg->session_lock); | |
818 | ||
819 | iscsi_post_login_start_timers(conn); | |
e48354ce NB |
820 | /* |
821 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
822 | * are scheduled on the same CPU. | |
823 | */ | |
824 | iscsit_thread_get_cpumask(conn); | |
825 | conn->conn_rx_reset_cpumask = 1; | |
826 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
827 | /* |
828 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
829 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
830 | */ | |
831 | complete(&conn->rx_login_comp); | |
e48354ce | 832 | iscsit_dec_conn_usage_count(conn); |
e48354ce NB |
833 | } |
834 | ||
835 | static void iscsi_handle_login_thread_timeout(unsigned long data) | |
836 | { | |
837 | struct iscsi_np *np = (struct iscsi_np *) data; | |
838 | ||
839 | spin_lock_bh(&np->np_thread_lock); | |
69d75574 AG |
840 | pr_err("iSCSI Login timeout on Network Portal %pISpc\n", |
841 | &np->np_sockaddr); | |
e48354ce NB |
842 | |
843 | if (np->np_login_timer_flags & ISCSI_TF_STOP) { | |
844 | spin_unlock_bh(&np->np_thread_lock); | |
845 | return; | |
846 | } | |
847 | ||
848 | if (np->np_thread) | |
849 | send_sig(SIGINT, np->np_thread, 1); | |
850 | ||
851 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
852 | spin_unlock_bh(&np->np_thread_lock); | |
853 | } | |
854 | ||
855 | static void iscsi_start_login_thread_timer(struct iscsi_np *np) | |
856 | { | |
857 | /* | |
858 | * This used the TA_LOGIN_TIMEOUT constant because at this | |
859 | * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout | |
860 | */ | |
861 | spin_lock_bh(&np->np_thread_lock); | |
862 | init_timer(&np->np_login_timer); | |
863 | np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); | |
864 | np->np_login_timer.data = (unsigned long)np; | |
865 | np->np_login_timer.function = iscsi_handle_login_thread_timeout; | |
866 | np->np_login_timer_flags &= ~ISCSI_TF_STOP; | |
867 | np->np_login_timer_flags |= ISCSI_TF_RUNNING; | |
868 | add_timer(&np->np_login_timer); | |
869 | ||
870 | pr_debug("Added timeout timer to iSCSI login request for" | |
871 | " %u seconds.\n", TA_LOGIN_TIMEOUT); | |
872 | spin_unlock_bh(&np->np_thread_lock); | |
873 | } | |
874 | ||
875 | static void iscsi_stop_login_thread_timer(struct iscsi_np *np) | |
876 | { | |
877 | spin_lock_bh(&np->np_thread_lock); | |
878 | if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { | |
879 | spin_unlock_bh(&np->np_thread_lock); | |
880 | return; | |
881 | } | |
882 | np->np_login_timer_flags |= ISCSI_TF_STOP; | |
883 | spin_unlock_bh(&np->np_thread_lock); | |
884 | ||
885 | del_timer_sync(&np->np_login_timer); | |
886 | ||
887 | spin_lock_bh(&np->np_thread_lock); | |
888 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
889 | spin_unlock_bh(&np->np_thread_lock); | |
890 | } | |
891 | ||
baa4d64b | 892 | int iscsit_setup_np( |
e48354ce | 893 | struct iscsi_np *np, |
13a3cf08 | 894 | struct sockaddr_storage *sockaddr) |
e48354ce | 895 | { |
baa4d64b | 896 | struct socket *sock = NULL; |
837f6452 | 897 | int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; |
e48354ce NB |
898 | |
899 | switch (np->np_network_transport) { | |
900 | case ISCSI_TCP: | |
901 | np->np_ip_proto = IPPROTO_TCP; | |
902 | np->np_sock_type = SOCK_STREAM; | |
903 | break; | |
904 | case ISCSI_SCTP_TCP: | |
905 | np->np_ip_proto = IPPROTO_SCTP; | |
906 | np->np_sock_type = SOCK_STREAM; | |
907 | break; | |
908 | case ISCSI_SCTP_UDP: | |
909 | np->np_ip_proto = IPPROTO_SCTP; | |
910 | np->np_sock_type = SOCK_SEQPACKET; | |
911 | break; | |
e48354ce NB |
912 | default: |
913 | pr_err("Unsupported network_transport: %d\n", | |
914 | np->np_network_transport); | |
915 | return -EINVAL; | |
916 | } | |
917 | ||
baa4d64b NB |
918 | np->np_ip_proto = IPPROTO_TCP; |
919 | np->np_sock_type = SOCK_STREAM; | |
920 | ||
e48354ce NB |
921 | ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
922 | np->np_ip_proto, &sock); | |
923 | if (ret < 0) { | |
924 | pr_err("sock_create() failed.\n"); | |
925 | return ret; | |
926 | } | |
927 | np->np_socket = sock; | |
e48354ce NB |
928 | /* |
929 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
930 | * in iscsi_target_configfs.c code.. | |
931 | */ | |
8359cf43 | 932 | memcpy(&np->np_sockaddr, sockaddr, |
13a3cf08 | 933 | sizeof(struct sockaddr_storage)); |
e48354ce NB |
934 | |
935 | if (sockaddr->ss_family == AF_INET6) | |
936 | len = sizeof(struct sockaddr_in6); | |
937 | else | |
938 | len = sizeof(struct sockaddr_in); | |
939 | /* | |
940 | * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. | |
941 | */ | |
8359cf43 | 942 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
943 | opt = 1; |
944 | if (np->np_network_transport == ISCSI_TCP) { | |
945 | ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, | |
946 | (char *)&opt, sizeof(opt)); | |
947 | if (ret < 0) { | |
948 | pr_err("kernel_setsockopt() for TCP_NODELAY" | |
949 | " failed: %d\n", ret); | |
950 | goto fail; | |
951 | } | |
952 | } | |
953 | ||
8359cf43 | 954 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
955 | ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
956 | (char *)&opt, sizeof(opt)); | |
957 | if (ret < 0) { | |
958 | pr_err("kernel_setsockopt() for SO_REUSEADDR" | |
959 | " failed\n"); | |
960 | goto fail; | |
961 | } | |
962 | ||
9f9ef6d3 DK |
963 | ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
964 | (char *)&opt, sizeof(opt)); | |
965 | if (ret < 0) { | |
966 | pr_err("kernel_setsockopt() for IP_FREEBIND" | |
967 | " failed\n"); | |
968 | goto fail; | |
969 | } | |
970 | ||
e48354ce NB |
971 | ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
972 | if (ret < 0) { | |
973 | pr_err("kernel_bind() failed: %d\n", ret); | |
974 | goto fail; | |
975 | } | |
976 | ||
977 | ret = kernel_listen(sock, backlog); | |
978 | if (ret != 0) { | |
979 | pr_err("kernel_listen() failed: %d\n", ret); | |
980 | goto fail; | |
981 | } | |
982 | ||
983 | return 0; | |
e48354ce NB |
984 | fail: |
985 | np->np_socket = NULL; | |
94e16e9c | 986 | sock_release(sock); |
e48354ce NB |
987 | return ret; |
988 | } | |
989 | ||
baa4d64b NB |
990 | int iscsi_target_setup_login_socket( |
991 | struct iscsi_np *np, | |
13a3cf08 | 992 | struct sockaddr_storage *sockaddr) |
baa4d64b NB |
993 | { |
994 | struct iscsit_transport *t; | |
995 | int rc; | |
996 | ||
997 | t = iscsit_get_transport(np->np_network_transport); | |
998 | if (!t) | |
999 | return -EINVAL; | |
1000 | ||
1001 | rc = t->iscsit_setup_np(np, sockaddr); | |
1002 | if (rc < 0) { | |
1003 | iscsit_put_transport(t); | |
1004 | return rc; | |
1005 | } | |
1006 | ||
1007 | np->np_transport = t; | |
14f4b54f | 1008 | np->enabled = true; |
baa4d64b NB |
1009 | return 0; |
1010 | } | |
1011 | ||
1012 | int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
1013 | { | |
1014 | struct socket *new_sock, *sock = np->np_socket; | |
1015 | struct sockaddr_in sock_in; | |
1016 | struct sockaddr_in6 sock_in6; | |
1017 | int rc, err; | |
1018 | ||
1019 | rc = kernel_accept(sock, &new_sock, 0); | |
1020 | if (rc < 0) | |
1021 | return rc; | |
1022 | ||
1023 | conn->sock = new_sock; | |
1024 | conn->login_family = np->np_sockaddr.ss_family; | |
baa4d64b NB |
1025 | |
1026 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
1027 | memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); | |
1028 | ||
1029 | rc = conn->sock->ops->getname(conn->sock, | |
1030 | (struct sockaddr *)&sock_in6, &err, 1); | |
1031 | if (!rc) { | |
dc58f760 AG |
1032 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1033 | memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1034 | } else { | |
1035 | /* Pretend to be an ipv4 socket */ | |
1036 | sock_in.sin_family = AF_INET; | |
1037 | sock_in.sin_port = sock_in6.sin6_port; | |
1038 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1039 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
1040 | } | |
baa4d64b NB |
1041 | } |
1042 | ||
1043 | rc = conn->sock->ops->getname(conn->sock, | |
1044 | (struct sockaddr *)&sock_in6, &err, 0); | |
1045 | if (!rc) { | |
69d75574 AG |
1046 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1047 | memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1048 | } else { | |
1049 | /* Pretend to be an ipv4 socket */ | |
1050 | sock_in.sin_family = AF_INET; | |
1051 | sock_in.sin_port = sock_in6.sin6_port; | |
1052 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1053 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
1054 | } | |
baa4d64b NB |
1055 | } |
1056 | } else { | |
1057 | memset(&sock_in, 0, sizeof(struct sockaddr_in)); | |
1058 | ||
1059 | rc = conn->sock->ops->getname(conn->sock, | |
1060 | (struct sockaddr *)&sock_in, &err, 1); | |
dc58f760 AG |
1061 | if (!rc) |
1062 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1063 | |
1064 | rc = conn->sock->ops->getname(conn->sock, | |
1065 | (struct sockaddr *)&sock_in, &err, 0); | |
69d75574 AG |
1066 | if (!rc) |
1067 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1068 | } |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
1074 | { | |
1075 | struct iscsi_login_req *login_req; | |
1076 | u32 padding = 0, payload_length; | |
1077 | ||
1078 | if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) | |
1079 | return -1; | |
1080 | ||
1081 | login_req = (struct iscsi_login_req *)login->req; | |
1082 | payload_length = ntoh24(login_req->dlength); | |
1083 | padding = ((-payload_length) & 3); | |
1084 | ||
1085 | pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," | |
1086 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", | |
1087 | login_req->flags, login_req->itt, login_req->cmdsn, | |
1088 | login_req->exp_statsn, login_req->cid, payload_length); | |
1089 | /* | |
1090 | * Setup the initial iscsi_login values from the leading | |
1091 | * login request PDU. | |
1092 | */ | |
1093 | if (login->first_request) { | |
1094 | login_req = (struct iscsi_login_req *)login->req; | |
1095 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
3e1c81a9 | 1096 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
baa4d64b NB |
1097 | login->version_min = login_req->min_version; |
1098 | login->version_max = login_req->max_version; | |
1099 | memcpy(login->isid, login_req->isid, 6); | |
1100 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1101 | login->init_task_tag = login_req->itt; | |
1102 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1103 | login->cid = be16_to_cpu(login_req->cid); | |
1104 | login->tsih = be16_to_cpu(login_req->tsih); | |
1105 | } | |
1106 | ||
1107 | if (iscsi_target_check_login_request(conn, login) < 0) | |
1108 | return -1; | |
1109 | ||
1110 | memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); | |
1111 | if (iscsi_login_rx_data(conn, login->req_buf, | |
1112 | payload_length + padding) < 0) | |
1113 | return -1; | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1119 | u32 length) | |
1120 | { | |
1121 | if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) | |
1122 | return -1; | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | static int | |
1128 | iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) | |
1129 | { | |
1130 | int rc; | |
1131 | ||
1132 | if (!t->owner) { | |
1133 | conn->conn_transport = t; | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | rc = try_module_get(t->owner); | |
1138 | if (!rc) { | |
1139 | pr_err("try_module_get() failed for %s\n", t->name); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | ||
1143 | conn->conn_transport = t; | |
1144 | return 0; | |
1145 | } | |
1146 | ||
a91eb7d9 NB |
1147 | void iscsi_target_login_sess_out(struct iscsi_conn *conn, |
1148 | struct iscsi_np *np, bool zero_tsih, bool new_sess) | |
1149 | { | |
0bcc297e | 1150 | if (!new_sess) |
a91eb7d9 NB |
1151 | goto old_sess_out; |
1152 | ||
1153 | pr_err("iSCSI Login negotiation failed.\n"); | |
1154 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
1155 | ISCSI_LOGIN_STATUS_INIT_ERR); | |
1156 | if (!zero_tsih || !conn->sess) | |
1157 | goto old_sess_out; | |
1158 | if (conn->sess->se_sess) | |
1159 | transport_free_session(conn->sess->se_sess); | |
1160 | if (conn->sess->session_index != 0) { | |
1161 | spin_lock_bh(&sess_idr_lock); | |
1162 | idr_remove(&sess_idr, conn->sess->session_index); | |
1163 | spin_unlock_bh(&sess_idr_lock); | |
1164 | } | |
1165 | kfree(conn->sess->sess_ops); | |
1166 | kfree(conn->sess); | |
a0b3b9b2 | 1167 | conn->sess = NULL; |
a91eb7d9 NB |
1168 | |
1169 | old_sess_out: | |
1170 | iscsi_stop_login_thread_timer(np); | |
1171 | /* | |
1172 | * If login negotiation fails check if the Time2Retain timer | |
1173 | * needs to be restarted. | |
1174 | */ | |
1175 | if (!zero_tsih && conn->sess) { | |
1176 | spin_lock_bh(&conn->sess->conn_lock); | |
1177 | if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { | |
1178 | struct se_portal_group *se_tpg = | |
60bfcf8e | 1179 | &conn->tpg->tpg_se_tpg; |
a91eb7d9 NB |
1180 | |
1181 | atomic_set(&conn->sess->session_continuation, 0); | |
1182 | spin_unlock_bh(&conn->sess->conn_lock); | |
1183 | spin_lock_bh(&se_tpg->session_lock); | |
1184 | iscsit_start_time2retain_handler(conn->sess); | |
1185 | spin_unlock_bh(&se_tpg->session_lock); | |
1186 | } else | |
1187 | spin_unlock_bh(&conn->sess->conn_lock); | |
1188 | iscsit_dec_session_usage_count(conn->sess); | |
1189 | } | |
1190 | ||
69110e3c HX |
1191 | ahash_request_free(conn->conn_tx_hash); |
1192 | if (conn->conn_rx_hash) { | |
1193 | struct crypto_ahash *tfm; | |
1194 | ||
1195 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
1196 | ahash_request_free(conn->conn_rx_hash); | |
1197 | crypto_free_ahash(tfm); | |
1198 | } | |
a91eb7d9 | 1199 | |
fbecb659 | 1200 | free_cpumask_var(conn->conn_cpumask); |
a91eb7d9 NB |
1201 | |
1202 | kfree(conn->conn_ops); | |
1203 | ||
1204 | if (conn->param_list) { | |
1205 | iscsi_release_param_list(conn->param_list); | |
1206 | conn->param_list = NULL; | |
1207 | } | |
1208 | iscsi_target_nego_release(conn); | |
1209 | ||
1210 | if (conn->sock) { | |
1211 | sock_release(conn->sock); | |
1212 | conn->sock = NULL; | |
1213 | } | |
1214 | ||
954f2372 SG |
1215 | if (conn->conn_transport->iscsit_wait_conn) |
1216 | conn->conn_transport->iscsit_wait_conn(conn); | |
1217 | ||
a91eb7d9 NB |
1218 | if (conn->conn_transport->iscsit_free_conn) |
1219 | conn->conn_transport->iscsit_free_conn(conn); | |
1220 | ||
1221 | iscsit_put_transport(conn->conn_transport); | |
1222 | kfree(conn); | |
1223 | } | |
1224 | ||
e48354ce NB |
1225 | static int __iscsi_target_login_thread(struct iscsi_np *np) |
1226 | { | |
baa4d64b | 1227 | u8 *buffer, zero_tsih = 0; |
81a9c5e7 | 1228 | int ret = 0, rc; |
e48354ce NB |
1229 | struct iscsi_conn *conn = NULL; |
1230 | struct iscsi_login *login; | |
1231 | struct iscsi_portal_group *tpg = NULL; | |
e48354ce | 1232 | struct iscsi_login_req *pdu; |
a91eb7d9 NB |
1233 | struct iscsi_tpg_np *tpg_np; |
1234 | bool new_sess = false; | |
e48354ce NB |
1235 | |
1236 | flush_signals(current); | |
e48354ce NB |
1237 | |
1238 | spin_lock_bh(&np->np_thread_lock); | |
1239 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1240 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1241 | complete(&np->np_restart_comp); | |
81a9c5e7 MP |
1242 | } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { |
1243 | spin_unlock_bh(&np->np_thread_lock); | |
1244 | goto exit; | |
e48354ce NB |
1245 | } else { |
1246 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1247 | } | |
1248 | spin_unlock_bh(&np->np_thread_lock); | |
1249 | ||
e48354ce NB |
1250 | conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
1251 | if (!conn) { | |
1252 | pr_err("Could not allocate memory for" | |
1253 | " new connection\n"); | |
e48354ce NB |
1254 | /* Get another socket */ |
1255 | return 1; | |
1256 | } | |
e48354ce NB |
1257 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
1258 | conn->conn_state = TARG_CONN_STATE_FREE; | |
e48354ce | 1259 | |
baa4d64b NB |
1260 | if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
1261 | kfree(conn); | |
1262 | return 1; | |
1263 | } | |
e48354ce | 1264 | |
baa4d64b NB |
1265 | rc = np->np_transport->iscsit_accept_np(np, conn); |
1266 | if (rc == -ENOSYS) { | |
1267 | complete(&np->np_restart_comp); | |
1268 | iscsit_put_transport(conn->conn_transport); | |
1269 | kfree(conn); | |
1270 | conn = NULL; | |
1271 | goto exit; | |
1272 | } else if (rc < 0) { | |
1273 | spin_lock_bh(&np->np_thread_lock); | |
1274 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1275 | spin_unlock_bh(&np->np_thread_lock); | |
1276 | complete(&np->np_restart_comp); | |
c9a03c12 NB |
1277 | iscsit_put_transport(conn->conn_transport); |
1278 | kfree(conn); | |
1279 | conn = NULL; | |
baa4d64b NB |
1280 | /* Get another socket */ |
1281 | return 1; | |
1282 | } | |
1283 | spin_unlock_bh(&np->np_thread_lock); | |
1284 | iscsit_put_transport(conn->conn_transport); | |
1285 | kfree(conn); | |
1286 | conn = NULL; | |
1287 | goto out; | |
e48354ce NB |
1288 | } |
1289 | /* | |
1290 | * Perform the remaining iSCSI connection initialization items.. | |
1291 | */ | |
baa4d64b NB |
1292 | login = iscsi_login_init_conn(conn); |
1293 | if (!login) { | |
e48354ce NB |
1294 | goto new_sess_out; |
1295 | } | |
1296 | ||
baa4d64b | 1297 | iscsi_start_login_thread_timer(np); |
e48354ce | 1298 | |
baa4d64b NB |
1299 | pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
1300 | conn->conn_state = TARG_CONN_STATE_XPT_UP; | |
1301 | /* | |
1302 | * This will process the first login request + payload.. | |
1303 | */ | |
1304 | rc = np->np_transport->iscsit_get_login_rx(conn, login); | |
1305 | if (rc == 1) | |
1306 | return 1; | |
1307 | else if (rc < 0) | |
1308 | goto new_sess_out; | |
66c7db68 | 1309 | |
baa4d64b NB |
1310 | buffer = &login->req[0]; |
1311 | pdu = (struct iscsi_login_req *)buffer; | |
e48354ce NB |
1312 | /* |
1313 | * Used by iscsit_tx_login_rsp() for Login Resonses PDUs | |
1314 | * when Status-Class != 0. | |
1315 | */ | |
baa4d64b | 1316 | conn->login_itt = pdu->itt; |
e48354ce NB |
1317 | |
1318 | spin_lock_bh(&np->np_thread_lock); | |
1319 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
1320 | spin_unlock_bh(&np->np_thread_lock); | |
69d75574 AG |
1321 | pr_err("iSCSI Network Portal on %pISpc currently not" |
1322 | " active.\n", &np->np_sockaddr); | |
e48354ce NB |
1323 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
1324 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); | |
1325 | goto new_sess_out; | |
1326 | } | |
1327 | spin_unlock_bh(&np->np_thread_lock); | |
1328 | ||
e48354ce NB |
1329 | conn->network_transport = np->np_network_transport; |
1330 | ||
dc58f760 AG |
1331 | pr_debug("Received iSCSI login request from %pISpc on %s Network" |
1332 | " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, | |
69d75574 | 1333 | &conn->local_sockaddr); |
e48354ce NB |
1334 | |
1335 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); | |
1336 | conn->conn_state = TARG_CONN_STATE_IN_LOGIN; | |
1337 | ||
1338 | if (iscsi_login_check_initiator_version(conn, pdu->max_version, | |
1339 | pdu->min_version) < 0) | |
1340 | goto new_sess_out; | |
1341 | ||
1342 | zero_tsih = (pdu->tsih == 0x0000); | |
ee1b1b9c | 1343 | if (zero_tsih) { |
e48354ce NB |
1344 | /* |
1345 | * This is the leading connection of a new session. | |
1346 | * We wait until after authentication to check for | |
1347 | * session reinstatement. | |
1348 | */ | |
1349 | if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) | |
1350 | goto new_sess_out; | |
1351 | } else { | |
1352 | /* | |
1353 | * Add a new connection to an existing session. | |
1354 | * We check for a non-existant session in | |
1355 | * iscsi_login_non_zero_tsih_s2() below based | |
1356 | * on ISID/TSIH, but wait until after authentication | |
1357 | * to check for connection reinstatement, etc. | |
1358 | */ | |
1359 | if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) | |
1360 | goto new_sess_out; | |
1361 | } | |
e48354ce | 1362 | /* |
baa4d64b NB |
1363 | * SessionType: Discovery |
1364 | * | |
1365 | * Locates Default Portal | |
1366 | * | |
1367 | * SessionType: Normal | |
1368 | * | |
1369 | * Locates Target Portal from NP -> Target IQN | |
e48354ce | 1370 | */ |
baa4d64b NB |
1371 | rc = iscsi_target_locate_portal(np, conn, login); |
1372 | if (rc < 0) { | |
e48354ce NB |
1373 | tpg = conn->tpg; |
1374 | goto new_sess_out; | |
1375 | } | |
a91eb7d9 | 1376 | login->zero_tsih = zero_tsih; |
e48354ce | 1377 | |
8abc718d FL |
1378 | if (conn->sess) |
1379 | conn->sess->se_sess->sup_prot_ops = | |
1380 | conn->conn_transport->iscsit_get_sup_prot_ops(conn); | |
23a548ee | 1381 | |
e48354ce NB |
1382 | tpg = conn->tpg; |
1383 | if (!tpg) { | |
1384 | pr_err("Unable to locate struct iscsi_conn->tpg\n"); | |
1385 | goto new_sess_out; | |
1386 | } | |
1387 | ||
1388 | if (zero_tsih) { | |
baa4d64b | 1389 | if (iscsi_login_zero_tsih_s2(conn) < 0) |
e48354ce | 1390 | goto new_sess_out; |
e48354ce | 1391 | } else { |
baa4d64b | 1392 | if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
e48354ce | 1393 | goto old_sess_out; |
e48354ce NB |
1394 | } |
1395 | ||
42bc3e57 VP |
1396 | if (conn->conn_transport->iscsit_validate_params) { |
1397 | ret = conn->conn_transport->iscsit_validate_params(conn); | |
1398 | if (ret < 0) { | |
1399 | if (zero_tsih) | |
1400 | goto new_sess_out; | |
1401 | else | |
1402 | goto old_sess_out; | |
1403 | } | |
1404 | } | |
1405 | ||
a91eb7d9 NB |
1406 | ret = iscsi_target_start_negotiation(login, conn); |
1407 | if (ret < 0) | |
e48354ce NB |
1408 | goto new_sess_out; |
1409 | ||
e48354ce NB |
1410 | iscsi_stop_login_thread_timer(np); |
1411 | ||
a91eb7d9 NB |
1412 | if (ret == 1) { |
1413 | tpg_np = conn->tpg_np; | |
e48354ce | 1414 | |
e5419865 | 1415 | iscsi_post_login_handler(np, conn, zero_tsih); |
a91eb7d9 NB |
1416 | iscsit_deaccess_np(np, tpg, tpg_np); |
1417 | } | |
e48354ce | 1418 | |
e48354ce | 1419 | tpg = NULL; |
a91eb7d9 | 1420 | tpg_np = NULL; |
e48354ce NB |
1421 | /* Get another socket */ |
1422 | return 1; | |
1423 | ||
1424 | new_sess_out: | |
a91eb7d9 | 1425 | new_sess = true; |
e48354ce | 1426 | old_sess_out: |
a91eb7d9 NB |
1427 | tpg_np = conn->tpg_np; |
1428 | iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); | |
1429 | new_sess = false; | |
e48354ce NB |
1430 | |
1431 | if (tpg) { | |
a91eb7d9 | 1432 | iscsit_deaccess_np(np, tpg, tpg_np); |
e48354ce | 1433 | tpg = NULL; |
a91eb7d9 | 1434 | tpg_np = NULL; |
e48354ce NB |
1435 | } |
1436 | ||
1437 | out: | |
81a9c5e7 MP |
1438 | return 1; |
1439 | ||
baa4d64b | 1440 | exit: |
e48354ce NB |
1441 | iscsi_stop_login_thread_timer(np); |
1442 | spin_lock_bh(&np->np_thread_lock); | |
1443 | np->np_thread_state = ISCSI_NP_THREAD_EXIT; | |
1444 | spin_unlock_bh(&np->np_thread_lock); | |
baa4d64b | 1445 | |
e48354ce NB |
1446 | return 0; |
1447 | } | |
1448 | ||
1449 | int iscsi_target_login_thread(void *arg) | |
1450 | { | |
8359cf43 | 1451 | struct iscsi_np *np = arg; |
e48354ce NB |
1452 | int ret; |
1453 | ||
1454 | allow_signal(SIGINT); | |
1455 | ||
81a9c5e7 | 1456 | while (1) { |
e48354ce NB |
1457 | ret = __iscsi_target_login_thread(np); |
1458 | /* | |
1459 | * We break and exit here unless another sock_accept() call | |
1460 | * is expected. | |
1461 | */ | |
1462 | if (ret != 1) | |
1463 | break; | |
1464 | } | |
1465 | ||
1466 | return 0; | |
1467 | } |