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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); | |
197b806a | 211 | atomic_set(&sess_p->session_fall_back_to_erl0, 1); |
e48354ce NB |
212 | spin_unlock(&sess_p->conn_lock); |
213 | iscsit_inc_session_usage_count(sess_p); | |
214 | iscsit_stop_time2retain_timer(sess_p); | |
215 | sess = sess_p; | |
216 | break; | |
217 | } | |
218 | spin_unlock(&sess_p->conn_lock); | |
219 | } | |
220 | spin_unlock_bh(&se_tpg->session_lock); | |
221 | /* | |
222 | * If the Time2Retain handler has expired, the session is already gone. | |
223 | */ | |
224 | if (!sess) | |
225 | return 0; | |
226 | ||
227 | pr_debug("%s iSCSI Session SID %u is still active for %s," | |
0d5efb8a | 228 | " performing session reinstatement.\n", (sessiontype) ? |
e48354ce NB |
229 | "Discovery" : "Normal", sess->sid, |
230 | sess->sess_ops->InitiatorName); | |
231 | ||
232 | spin_lock_bh(&sess->conn_lock); | |
233 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
234 | spin_unlock_bh(&sess->conn_lock); | |
235 | iscsit_dec_session_usage_count(sess); | |
44f33d0f | 236 | iscsit_close_session(sess); |
99367f01 | 237 | return 0; |
e48354ce NB |
238 | } |
239 | spin_unlock_bh(&sess->conn_lock); | |
240 | ||
241 | iscsit_stop_session(sess, 1, 1); | |
242 | iscsit_dec_session_usage_count(sess); | |
243 | ||
44f33d0f | 244 | iscsit_close_session(sess); |
99367f01 | 245 | return 0; |
e48354ce NB |
246 | } |
247 | ||
6787ab81 | 248 | static int iscsi_login_set_conn_values( |
e48354ce NB |
249 | struct iscsi_session *sess, |
250 | struct iscsi_conn *conn, | |
50e5c87d | 251 | __be16 cid) |
e48354ce | 252 | { |
6787ab81 | 253 | int ret; |
e48354ce | 254 | conn->sess = sess; |
50e5c87d | 255 | conn->cid = be16_to_cpu(cid); |
e48354ce NB |
256 | /* |
257 | * Generate a random Status sequence number (statsn) for the new | |
258 | * iSCSI connection. | |
259 | */ | |
6787ab81 JD |
260 | ret = get_random_bytes_wait(&conn->stat_sn, sizeof(u32)); |
261 | if (unlikely(ret)) | |
262 | return ret; | |
e48354ce NB |
263 | |
264 | mutex_lock(&auth_id_lock); | |
265 | conn->auth_id = iscsit_global->auth_id++; | |
266 | mutex_unlock(&auth_id_lock); | |
6787ab81 | 267 | return 0; |
e48354ce NB |
268 | } |
269 | ||
d2faaefb | 270 | __printf(2, 3) int iscsi_change_param_sprintf( |
79d59d08 RD |
271 | struct iscsi_conn *conn, |
272 | const char *fmt, ...) | |
273 | { | |
274 | va_list args; | |
275 | unsigned char buf[64]; | |
276 | ||
277 | memset(buf, 0, sizeof buf); | |
278 | ||
279 | va_start(args, fmt); | |
280 | vsnprintf(buf, sizeof buf, fmt, args); | |
281 | va_end(args); | |
282 | ||
283 | if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { | |
284 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
285 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
d2faaefb | 291 | EXPORT_SYMBOL(iscsi_change_param_sprintf); |
79d59d08 | 292 | |
e48354ce NB |
293 | /* |
294 | * This is the leading connection of a new session, | |
295 | * or session reinstatement. | |
296 | */ | |
297 | static int iscsi_login_zero_tsih_s1( | |
298 | struct iscsi_conn *conn, | |
299 | unsigned char *buf) | |
300 | { | |
301 | struct iscsi_session *sess = NULL; | |
302 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
13b5533a | 303 | int ret; |
e48354ce NB |
304 | |
305 | sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); | |
306 | if (!sess) { | |
307 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
308 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
309 | pr_err("Could not allocate memory for session\n"); | |
0957627a | 310 | return -ENOMEM; |
e48354ce NB |
311 | } |
312 | ||
6787ab81 JD |
313 | ret = iscsi_login_set_conn_values(sess, conn, pdu->cid); |
314 | if (unlikely(ret)) { | |
315 | kfree(sess); | |
316 | return ret; | |
317 | } | |
e48354ce | 318 | sess->init_task_tag = pdu->itt; |
8359cf43 | 319 | memcpy(&sess->isid, pdu->isid, 6); |
50e5c87d | 320 | sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
e48354ce NB |
321 | INIT_LIST_HEAD(&sess->sess_conn_list); |
322 | INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); | |
323 | INIT_LIST_HEAD(&sess->cr_active_list); | |
324 | INIT_LIST_HEAD(&sess->cr_inactive_list); | |
325 | init_completion(&sess->async_msg_comp); | |
326 | init_completion(&sess->reinstatement_comp); | |
327 | init_completion(&sess->session_wait_comp); | |
328 | init_completion(&sess->session_waiting_on_uc_comp); | |
329 | mutex_init(&sess->cmdsn_mutex); | |
330 | spin_lock_init(&sess->conn_lock); | |
331 | spin_lock_init(&sess->cr_a_lock); | |
332 | spin_lock_init(&sess->cr_i_lock); | |
333 | spin_lock_init(&sess->session_usage_lock); | |
334 | spin_lock_init(&sess->ttt_lock); | |
335 | ||
f7c9564a KC |
336 | timer_setup(&sess->time2retain_timer, |
337 | iscsit_handle_time2retain_timeout, 0); | |
8a47aa9d | 338 | |
c9365bd0 | 339 | idr_preload(GFP_KERNEL); |
998866b0 | 340 | spin_lock_bh(&sess_idr_lock); |
c9365bd0 TH |
341 | ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
342 | if (ret >= 0) | |
343 | sess->session_index = ret; | |
998866b0 | 344 | spin_unlock_bh(&sess_idr_lock); |
c9365bd0 | 345 | idr_preload_end(); |
e48354ce | 346 | |
13b5533a | 347 | if (ret < 0) { |
c9365bd0 | 348 | pr_err("idr_alloc() for sess_idr failed\n"); |
13b5533a BW |
349 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
350 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
351 | kfree(sess); | |
352 | return -ENOMEM; | |
353 | } | |
354 | ||
e48354ce | 355 | sess->creation_time = get_jiffies_64(); |
e48354ce NB |
356 | /* |
357 | * The FFP CmdSN window values will be allocated from the TPG's | |
358 | * Initiator Node's ACL once the login has been successfully completed. | |
359 | */ | |
109e2381 | 360 | atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); |
e48354ce NB |
361 | |
362 | sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); | |
363 | if (!sess->sess_ops) { | |
364 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
365 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
366 | pr_err("Unable to allocate memory for" | |
367 | " struct iscsi_sess_ops.\n"); | |
0957627a NB |
368 | kfree(sess); |
369 | return -ENOMEM; | |
e48354ce NB |
370 | } |
371 | ||
23a548ee | 372 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
0957627a | 373 | if (IS_ERR(sess->se_sess)) { |
e48354ce NB |
374 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
375 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
a928d28d | 376 | kfree(sess->sess_ops); |
0957627a NB |
377 | kfree(sess); |
378 | return -ENOMEM; | |
e48354ce NB |
379 | } |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int iscsi_login_zero_tsih_s2( | |
385 | struct iscsi_conn *conn) | |
386 | { | |
387 | struct iscsi_node_attrib *na; | |
388 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 389 | bool iser = false; |
e48354ce NB |
390 | |
391 | sess->tpg = conn->tpg; | |
392 | ||
393 | /* | |
394 | * Assign a new TPG Session Handle. Note this is protected with | |
395 | * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). | |
396 | */ | |
60bfcf8e | 397 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce | 398 | if (!sess->tsih) |
60bfcf8e | 399 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce NB |
400 | |
401 | /* | |
402 | * Create the default params from user defined values.. | |
403 | */ | |
404 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 405 | conn->tpg->param_list, 1) < 0) { |
e48354ce NB |
406 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
407 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
408 | return -1; | |
409 | } | |
410 | ||
03aa2070 NB |
411 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
412 | iser = true; | |
413 | ||
414 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
415 | |
416 | if (sess->sess_ops->SessionType) | |
417 | return iscsi_set_keys_irrelevant_for_discovery( | |
418 | conn->param_list); | |
419 | ||
420 | na = iscsit_tpg_get_node_attrib(sess); | |
421 | ||
422 | /* | |
423 | * Need to send TargetPortalGroupTag back in first login response | |
424 | * on any iSCSI connection where the Initiator provides TargetName. | |
425 | * See 5.3.1. Login Phase Start | |
426 | * | |
427 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
428 | */ | |
79d59d08 | 429 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 430 | return -1; |
e48354ce NB |
431 | |
432 | /* | |
433 | * Workaround for Initiators that have broken connection recovery logic. | |
434 | * | |
435 | * "We would really like to get rid of this." Linux-iSCSI.org team | |
436 | */ | |
79d59d08 | 437 | if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) |
e48354ce | 438 | return -1; |
e48354ce | 439 | |
03aa2070 NB |
440 | /* |
441 | * Set RDMAExtensions=Yes by default for iSER enabled network portals | |
442 | */ | |
443 | if (iser) { | |
444 | struct iscsi_param *param; | |
445 | unsigned long mrdsl, off; | |
446 | int rc; | |
447 | ||
79d59d08 | 448 | if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) |
03aa2070 | 449 | return -1; |
79d59d08 | 450 | |
03aa2070 NB |
451 | /* |
452 | * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for | |
3fc6a642 | 453 | * Immediate Data + Unsolicited Data-OUT if necessary.. |
03aa2070 NB |
454 | */ |
455 | param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", | |
456 | conn->param_list); | |
457 | if (!param) { | |
458 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
459 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
460 | return -1; | |
461 | } | |
57103d7f | 462 | rc = kstrtoul(param->value, 0, &mrdsl); |
03aa2070 NB |
463 | if (rc < 0) { |
464 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
465 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
466 | return -1; | |
467 | } | |
468 | off = mrdsl % PAGE_SIZE; | |
469 | if (!off) | |
52d0aa79 | 470 | goto check_prot; |
03aa2070 NB |
471 | |
472 | if (mrdsl < PAGE_SIZE) | |
473 | mrdsl = PAGE_SIZE; | |
474 | else | |
475 | mrdsl -= off; | |
476 | ||
477 | pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" | |
478 | " to PAGE_SIZE\n", mrdsl); | |
479 | ||
79d59d08 | 480 | if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) |
03aa2070 | 481 | return -1; |
52d0aa79 NB |
482 | /* |
483 | * ISER currently requires that ImmediateData + Unsolicited | |
484 | * Data be disabled when protection / signature MRs are enabled. | |
485 | */ | |
486 | check_prot: | |
487 | if (sess->se_sess->sup_prot_ops & | |
488 | (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | | |
489 | TARGET_PROT_DOUT_INSERT)) { | |
490 | ||
79d59d08 | 491 | if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) |
52d0aa79 | 492 | return -1; |
52d0aa79 | 493 | |
79d59d08 | 494 | if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) |
52d0aa79 | 495 | return -1; |
79d59d08 | 496 | |
52d0aa79 NB |
497 | pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" |
498 | " T10-PI enabled ISER session\n"); | |
499 | } | |
03aa2070 | 500 | } |
e48354ce NB |
501 | |
502 | return 0; | |
503 | } | |
504 | ||
e48354ce NB |
505 | static int iscsi_login_non_zero_tsih_s1( |
506 | struct iscsi_conn *conn, | |
507 | unsigned char *buf) | |
508 | { | |
509 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
510 | ||
6787ab81 | 511 | return iscsi_login_set_conn_values(NULL, conn, pdu->cid); |
e48354ce NB |
512 | } |
513 | ||
514 | /* | |
515 | * Add a new connection to an existing session. | |
516 | */ | |
517 | static int iscsi_login_non_zero_tsih_s2( | |
518 | struct iscsi_conn *conn, | |
519 | unsigned char *buf) | |
520 | { | |
521 | struct iscsi_portal_group *tpg = conn->tpg; | |
522 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
523 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
524 | struct se_session *se_sess, *se_sess_tmp; | |
525 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
03aa2070 | 526 | bool iser = false; |
e48354ce NB |
527 | |
528 | spin_lock_bh(&se_tpg->session_lock); | |
529 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
530 | sess_list) { | |
531 | ||
532 | sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
533 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
534 | atomic_read(&sess_p->session_logout) || | |
535 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) | |
536 | continue; | |
8359cf43 | 537 | if (!memcmp(sess_p->isid, pdu->isid, 6) && |
50e5c87d | 538 | (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
e48354ce NB |
539 | iscsit_inc_session_usage_count(sess_p); |
540 | iscsit_stop_time2retain_timer(sess_p); | |
541 | sess = sess_p; | |
542 | break; | |
543 | } | |
544 | } | |
545 | spin_unlock_bh(&se_tpg->session_lock); | |
546 | ||
547 | /* | |
548 | * If the Time2Retain handler has expired, the session is already gone. | |
549 | */ | |
550 | if (!sess) { | |
551 | pr_err("Initiator attempting to add a connection to" | |
552 | " a non-existent session, rejecting iSCSI Login.\n"); | |
553 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
554 | ISCSI_LOGIN_STATUS_NO_SESSION); | |
555 | return -1; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Stop the Time2Retain timer if this is a failed session, we restart | |
560 | * the timer if the login is not successful. | |
561 | */ | |
562 | spin_lock_bh(&sess->conn_lock); | |
563 | if (sess->session_state == TARG_SESS_STATE_FAILED) | |
564 | atomic_set(&sess->session_continuation, 1); | |
565 | spin_unlock_bh(&sess->conn_lock); | |
566 | ||
6787ab81 JD |
567 | if (iscsi_login_set_conn_values(sess, conn, pdu->cid) < 0 || |
568 | iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 569 | conn->tpg->param_list, 0) < 0) { |
e48354ce NB |
570 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
571 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
572 | return -1; | |
573 | } | |
574 | ||
03aa2070 NB |
575 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
576 | iser = true; | |
577 | ||
578 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
579 | /* |
580 | * Need to send TargetPortalGroupTag back in first login response | |
581 | * on any iSCSI connection where the Initiator provides TargetName. | |
582 | * See 5.3.1. Login Phase Start | |
583 | * | |
584 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
585 | */ | |
79d59d08 | 586 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 587 | return -1; |
e48354ce | 588 | |
c04a6091 | 589 | return 0; |
e48354ce NB |
590 | } |
591 | ||
592 | int iscsi_login_post_auth_non_zero_tsih( | |
593 | struct iscsi_conn *conn, | |
594 | u16 cid, | |
595 | u32 exp_statsn) | |
596 | { | |
597 | struct iscsi_conn *conn_ptr = NULL; | |
598 | struct iscsi_conn_recovery *cr = NULL; | |
599 | struct iscsi_session *sess = conn->sess; | |
600 | ||
601 | /* | |
602 | * By following item 5 in the login table, if we have found | |
603 | * an existing ISID and a valid/existing TSIH and an existing | |
604 | * CID we do connection reinstatement. Currently we dont not | |
605 | * support it so we send back an non-zero status class to the | |
606 | * initiator and release the new connection. | |
607 | */ | |
608 | conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); | |
ee1b1b9c | 609 | if (conn_ptr) { |
e48354ce NB |
610 | pr_err("Connection exists with CID %hu for %s," |
611 | " performing connection reinstatement.\n", | |
612 | conn_ptr->cid, sess->sess_ops->InitiatorName); | |
613 | ||
614 | iscsit_connection_reinstatement_rcfr(conn_ptr); | |
615 | iscsit_dec_conn_usage_count(conn_ptr); | |
616 | } | |
617 | ||
618 | /* | |
619 | * Check for any connection recovery entires containing CID. | |
620 | * We use the original ExpStatSN sent in the first login request | |
621 | * to acknowledge commands for the failed connection. | |
622 | * | |
623 | * Also note that an explict logout may have already been sent, | |
624 | * but the response may not be sent due to additional connection | |
625 | * loss. | |
626 | */ | |
627 | if (sess->sess_ops->ErrorRecoveryLevel == 2) { | |
628 | cr = iscsit_get_inactive_connection_recovery_entry( | |
629 | sess, cid); | |
ee1b1b9c | 630 | if (cr) { |
e48354ce NB |
631 | pr_debug("Performing implicit logout" |
632 | " for connection recovery on CID: %hu\n", | |
633 | conn->cid); | |
634 | iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); | |
635 | } | |
636 | } | |
637 | ||
638 | /* | |
639 | * Else we follow item 4 from the login table in that we have | |
640 | * found an existing ISID and a valid/existing TSIH and a new | |
641 | * CID we go ahead and continue to add a new connection to the | |
642 | * session. | |
643 | */ | |
644 | pr_debug("Adding CID %hu to existing session for %s.\n", | |
645 | cid, sess->sess_ops->InitiatorName); | |
646 | ||
647 | if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { | |
648 | pr_err("Adding additional connection to this session" | |
649 | " would exceed MaxConnections %d, login failed.\n", | |
650 | sess->sess_ops->MaxConnections); | |
651 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
652 | ISCSI_LOGIN_STATUS_ISID_ERROR); | |
653 | return -1; | |
654 | } | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static void iscsi_post_login_start_timers(struct iscsi_conn *conn) | |
660 | { | |
661 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 662 | /* |
3fc6a642 | 663 | * FIXME: Unsolicited NopIN support for ISER |
03aa2070 NB |
664 | */ |
665 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) | |
666 | return; | |
e48354ce NB |
667 | |
668 | if (!sess->sess_ops->SessionType) | |
669 | iscsit_start_nopin_timer(conn); | |
670 | } | |
671 | ||
e5419865 | 672 | int iscsit_start_kthreads(struct iscsi_conn *conn) |
88dcd2da NB |
673 | { |
674 | int ret = 0; | |
675 | ||
676 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
677 | conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, | |
678 | ISCSIT_BITMAP_BITS, get_order(1)); | |
679 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
680 | ||
681 | if (conn->bitmap_id < 0) { | |
682 | pr_err("bitmap_find_free_region() failed for" | |
683 | " iscsit_start_kthreads()\n"); | |
684 | return -ENOMEM; | |
685 | } | |
686 | ||
687 | conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, | |
688 | "%s", ISCSI_TX_THREAD_NAME); | |
689 | if (IS_ERR(conn->tx_thread)) { | |
690 | pr_err("Unable to start iscsi_target_tx_thread\n"); | |
691 | ret = PTR_ERR(conn->tx_thread); | |
692 | goto out_bitmap; | |
693 | } | |
694 | conn->tx_thread_active = true; | |
695 | ||
696 | conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, | |
697 | "%s", ISCSI_RX_THREAD_NAME); | |
698 | if (IS_ERR(conn->rx_thread)) { | |
699 | pr_err("Unable to start iscsi_target_rx_thread\n"); | |
700 | ret = PTR_ERR(conn->rx_thread); | |
701 | goto out_tx; | |
702 | } | |
703 | conn->rx_thread_active = true; | |
704 | ||
705 | return 0; | |
706 | out_tx: | |
e5419865 | 707 | send_sig(SIGINT, conn->tx_thread, 1); |
88dcd2da NB |
708 | kthread_stop(conn->tx_thread); |
709 | conn->tx_thread_active = false; | |
710 | out_bitmap: | |
711 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
712 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
713 | get_order(1)); | |
714 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
715 | return ret; | |
716 | } | |
717 | ||
e5419865 | 718 | void iscsi_post_login_handler( |
e48354ce NB |
719 | struct iscsi_np *np, |
720 | struct iscsi_conn *conn, | |
721 | u8 zero_tsih) | |
722 | { | |
723 | int stop_timer = 0; | |
724 | struct iscsi_session *sess = conn->sess; | |
725 | struct se_session *se_sess = sess->se_sess; | |
60bfcf8e | 726 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce | 727 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
e48354ce NB |
728 | |
729 | iscsit_inc_conn_usage_count(conn); | |
730 | ||
731 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, | |
732 | ISCSI_LOGIN_STATUS_ACCEPT); | |
733 | ||
734 | pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); | |
735 | conn->conn_state = TARG_CONN_STATE_LOGGED_IN; | |
736 | ||
737 | iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); | |
e48354ce NB |
738 | /* |
739 | * SCSI Initiator -> SCSI Target Port Mapping | |
740 | */ | |
e48354ce NB |
741 | if (!zero_tsih) { |
742 | iscsi_set_session_parameters(sess->sess_ops, | |
743 | conn->param_list, 0); | |
744 | iscsi_release_param_list(conn->param_list); | |
745 | conn->param_list = NULL; | |
746 | ||
747 | spin_lock_bh(&sess->conn_lock); | |
748 | atomic_set(&sess->session_continuation, 0); | |
749 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
750 | pr_debug("Moving to" | |
751 | " TARG_SESS_STATE_LOGGED_IN.\n"); | |
752 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
753 | stop_timer = 1; | |
754 | } | |
755 | ||
dc58f760 AG |
756 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" |
757 | " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, | |
69d75574 | 758 | &conn->local_sockaddr, tpg->tpgt); |
e48354ce NB |
759 | |
760 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
761 | atomic_inc(&sess->nconn); | |
762 | pr_debug("Incremented iSCSI Connection count to %hu" | |
763 | " from node: %s\n", atomic_read(&sess->nconn), | |
764 | sess->sess_ops->InitiatorName); | |
765 | spin_unlock_bh(&sess->conn_lock); | |
766 | ||
88dcd2da | 767 | iscsi_post_login_start_timers(conn); |
e48354ce NB |
768 | /* |
769 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
770 | * are scheduled on the same CPU. | |
771 | */ | |
772 | iscsit_thread_get_cpumask(conn); | |
773 | conn->conn_rx_reset_cpumask = 1; | |
774 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
775 | /* |
776 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
777 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
778 | */ | |
779 | complete(&conn->rx_login_comp); | |
e48354ce | 780 | iscsit_dec_conn_usage_count(conn); |
e5419865 | 781 | |
e48354ce NB |
782 | if (stop_timer) { |
783 | spin_lock_bh(&se_tpg->session_lock); | |
784 | iscsit_stop_time2retain_timer(sess); | |
785 | spin_unlock_bh(&se_tpg->session_lock); | |
786 | } | |
787 | iscsit_dec_session_usage_count(sess); | |
e5419865 | 788 | return; |
e48354ce NB |
789 | } |
790 | ||
791 | iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); | |
792 | iscsi_release_param_list(conn->param_list); | |
793 | conn->param_list = NULL; | |
794 | ||
795 | iscsit_determine_maxcmdsn(sess); | |
796 | ||
797 | spin_lock_bh(&se_tpg->session_lock); | |
798 | __transport_register_session(&sess->tpg->tpg_se_tpg, | |
8359cf43 | 799 | se_sess->se_node_acl, se_sess, sess); |
e48354ce NB |
800 | pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
801 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
802 | ||
dc58f760 AG |
803 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", |
804 | conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, | |
2f9bc894 | 805 | tpg->tpgt); |
e48354ce NB |
806 | |
807 | spin_lock_bh(&sess->conn_lock); | |
808 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
809 | atomic_inc(&sess->nconn); | |
810 | pr_debug("Incremented iSCSI Connection count to %hu from node:" | |
811 | " %s\n", atomic_read(&sess->nconn), | |
812 | sess->sess_ops->InitiatorName); | |
813 | spin_unlock_bh(&sess->conn_lock); | |
814 | ||
815 | sess->sid = tpg->sid++; | |
816 | if (!sess->sid) | |
817 | sess->sid = tpg->sid++; | |
818 | pr_debug("Established iSCSI session from node: %s\n", | |
819 | sess->sess_ops->InitiatorName); | |
820 | ||
821 | tpg->nsessions++; | |
822 | if (tpg->tpg_tiqn) | |
823 | tpg->tpg_tiqn->tiqn_nsessions++; | |
824 | ||
825 | pr_debug("Incremented number of active iSCSI sessions to %u on" | |
826 | " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); | |
827 | spin_unlock_bh(&se_tpg->session_lock); | |
828 | ||
829 | iscsi_post_login_start_timers(conn); | |
e48354ce NB |
830 | /* |
831 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
832 | * are scheduled on the same CPU. | |
833 | */ | |
834 | iscsit_thread_get_cpumask(conn); | |
835 | conn->conn_rx_reset_cpumask = 1; | |
836 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
837 | /* |
838 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
839 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
840 | */ | |
841 | complete(&conn->rx_login_comp); | |
e48354ce | 842 | iscsit_dec_conn_usage_count(conn); |
e48354ce NB |
843 | } |
844 | ||
f7c9564a | 845 | void iscsi_handle_login_thread_timeout(struct timer_list *t) |
e48354ce | 846 | { |
f7c9564a | 847 | struct iscsi_np *np = from_timer(np, t, np_login_timer); |
e48354ce NB |
848 | |
849 | spin_lock_bh(&np->np_thread_lock); | |
69d75574 AG |
850 | pr_err("iSCSI Login timeout on Network Portal %pISpc\n", |
851 | &np->np_sockaddr); | |
e48354ce NB |
852 | |
853 | if (np->np_login_timer_flags & ISCSI_TF_STOP) { | |
854 | spin_unlock_bh(&np->np_thread_lock); | |
855 | return; | |
856 | } | |
857 | ||
858 | if (np->np_thread) | |
859 | send_sig(SIGINT, np->np_thread, 1); | |
860 | ||
861 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
862 | spin_unlock_bh(&np->np_thread_lock); | |
863 | } | |
864 | ||
865 | static void iscsi_start_login_thread_timer(struct iscsi_np *np) | |
866 | { | |
867 | /* | |
868 | * This used the TA_LOGIN_TIMEOUT constant because at this | |
869 | * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout | |
870 | */ | |
871 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
872 | np->np_login_timer_flags &= ~ISCSI_TF_STOP; |
873 | np->np_login_timer_flags |= ISCSI_TF_RUNNING; | |
8a47aa9d | 874 | mod_timer(&np->np_login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ); |
e48354ce NB |
875 | |
876 | pr_debug("Added timeout timer to iSCSI login request for" | |
877 | " %u seconds.\n", TA_LOGIN_TIMEOUT); | |
878 | spin_unlock_bh(&np->np_thread_lock); | |
879 | } | |
880 | ||
881 | static void iscsi_stop_login_thread_timer(struct iscsi_np *np) | |
882 | { | |
883 | spin_lock_bh(&np->np_thread_lock); | |
884 | if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { | |
885 | spin_unlock_bh(&np->np_thread_lock); | |
886 | return; | |
887 | } | |
888 | np->np_login_timer_flags |= ISCSI_TF_STOP; | |
889 | spin_unlock_bh(&np->np_thread_lock); | |
890 | ||
891 | del_timer_sync(&np->np_login_timer); | |
892 | ||
893 | spin_lock_bh(&np->np_thread_lock); | |
894 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
895 | spin_unlock_bh(&np->np_thread_lock); | |
896 | } | |
897 | ||
baa4d64b | 898 | int iscsit_setup_np( |
e48354ce | 899 | struct iscsi_np *np, |
13a3cf08 | 900 | struct sockaddr_storage *sockaddr) |
e48354ce | 901 | { |
baa4d64b | 902 | struct socket *sock = NULL; |
837f6452 | 903 | int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; |
e48354ce NB |
904 | |
905 | switch (np->np_network_transport) { | |
906 | case ISCSI_TCP: | |
907 | np->np_ip_proto = IPPROTO_TCP; | |
908 | np->np_sock_type = SOCK_STREAM; | |
909 | break; | |
910 | case ISCSI_SCTP_TCP: | |
911 | np->np_ip_proto = IPPROTO_SCTP; | |
912 | np->np_sock_type = SOCK_STREAM; | |
913 | break; | |
914 | case ISCSI_SCTP_UDP: | |
915 | np->np_ip_proto = IPPROTO_SCTP; | |
916 | np->np_sock_type = SOCK_SEQPACKET; | |
917 | break; | |
e48354ce NB |
918 | default: |
919 | pr_err("Unsupported network_transport: %d\n", | |
920 | np->np_network_transport); | |
921 | return -EINVAL; | |
922 | } | |
923 | ||
baa4d64b NB |
924 | np->np_ip_proto = IPPROTO_TCP; |
925 | np->np_sock_type = SOCK_STREAM; | |
926 | ||
e48354ce NB |
927 | ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
928 | np->np_ip_proto, &sock); | |
929 | if (ret < 0) { | |
930 | pr_err("sock_create() failed.\n"); | |
931 | return ret; | |
932 | } | |
933 | np->np_socket = sock; | |
e48354ce NB |
934 | /* |
935 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
936 | * in iscsi_target_configfs.c code.. | |
937 | */ | |
8359cf43 | 938 | memcpy(&np->np_sockaddr, sockaddr, |
13a3cf08 | 939 | sizeof(struct sockaddr_storage)); |
e48354ce NB |
940 | |
941 | if (sockaddr->ss_family == AF_INET6) | |
942 | len = sizeof(struct sockaddr_in6); | |
943 | else | |
944 | len = sizeof(struct sockaddr_in); | |
945 | /* | |
946 | * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. | |
947 | */ | |
8359cf43 | 948 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
949 | opt = 1; |
950 | if (np->np_network_transport == ISCSI_TCP) { | |
951 | ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, | |
952 | (char *)&opt, sizeof(opt)); | |
953 | if (ret < 0) { | |
954 | pr_err("kernel_setsockopt() for TCP_NODELAY" | |
955 | " failed: %d\n", ret); | |
956 | goto fail; | |
957 | } | |
958 | } | |
959 | ||
8359cf43 | 960 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
961 | ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
962 | (char *)&opt, sizeof(opt)); | |
963 | if (ret < 0) { | |
964 | pr_err("kernel_setsockopt() for SO_REUSEADDR" | |
965 | " failed\n"); | |
966 | goto fail; | |
967 | } | |
968 | ||
9f9ef6d3 DK |
969 | ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
970 | (char *)&opt, sizeof(opt)); | |
971 | if (ret < 0) { | |
972 | pr_err("kernel_setsockopt() for IP_FREEBIND" | |
973 | " failed\n"); | |
974 | goto fail; | |
975 | } | |
976 | ||
e48354ce NB |
977 | ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
978 | if (ret < 0) { | |
979 | pr_err("kernel_bind() failed: %d\n", ret); | |
980 | goto fail; | |
981 | } | |
982 | ||
983 | ret = kernel_listen(sock, backlog); | |
984 | if (ret != 0) { | |
985 | pr_err("kernel_listen() failed: %d\n", ret); | |
986 | goto fail; | |
987 | } | |
988 | ||
989 | return 0; | |
e48354ce NB |
990 | fail: |
991 | np->np_socket = NULL; | |
94e16e9c | 992 | sock_release(sock); |
e48354ce NB |
993 | return ret; |
994 | } | |
995 | ||
baa4d64b NB |
996 | int iscsi_target_setup_login_socket( |
997 | struct iscsi_np *np, | |
13a3cf08 | 998 | struct sockaddr_storage *sockaddr) |
baa4d64b NB |
999 | { |
1000 | struct iscsit_transport *t; | |
1001 | int rc; | |
1002 | ||
1003 | t = iscsit_get_transport(np->np_network_transport); | |
1004 | if (!t) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | rc = t->iscsit_setup_np(np, sockaddr); | |
1008 | if (rc < 0) { | |
1009 | iscsit_put_transport(t); | |
1010 | return rc; | |
1011 | } | |
1012 | ||
1013 | np->np_transport = t; | |
14f4b54f | 1014 | np->enabled = true; |
baa4d64b NB |
1015 | return 0; |
1016 | } | |
1017 | ||
1018 | int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
1019 | { | |
1020 | struct socket *new_sock, *sock = np->np_socket; | |
1021 | struct sockaddr_in sock_in; | |
1022 | struct sockaddr_in6 sock_in6; | |
9b2c45d4 | 1023 | int rc; |
baa4d64b NB |
1024 | |
1025 | rc = kernel_accept(sock, &new_sock, 0); | |
1026 | if (rc < 0) | |
1027 | return rc; | |
1028 | ||
1029 | conn->sock = new_sock; | |
1030 | conn->login_family = np->np_sockaddr.ss_family; | |
baa4d64b NB |
1031 | |
1032 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
1033 | memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); | |
1034 | ||
1035 | rc = conn->sock->ops->getname(conn->sock, | |
9b2c45d4 DV |
1036 | (struct sockaddr *)&sock_in6, 1); |
1037 | if (rc >= 0) { | |
dc58f760 AG |
1038 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1039 | memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1040 | } else { | |
1041 | /* Pretend to be an ipv4 socket */ | |
1042 | sock_in.sin_family = AF_INET; | |
1043 | sock_in.sin_port = sock_in6.sin6_port; | |
1044 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1045 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
1046 | } | |
baa4d64b NB |
1047 | } |
1048 | ||
1049 | rc = conn->sock->ops->getname(conn->sock, | |
9b2c45d4 DV |
1050 | (struct sockaddr *)&sock_in6, 0); |
1051 | if (rc >= 0) { | |
69d75574 AG |
1052 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1053 | memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1054 | } else { | |
1055 | /* Pretend to be an ipv4 socket */ | |
1056 | sock_in.sin_family = AF_INET; | |
1057 | sock_in.sin_port = sock_in6.sin6_port; | |
1058 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1059 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
1060 | } | |
baa4d64b NB |
1061 | } |
1062 | } else { | |
1063 | memset(&sock_in, 0, sizeof(struct sockaddr_in)); | |
1064 | ||
1065 | rc = conn->sock->ops->getname(conn->sock, | |
9b2c45d4 DV |
1066 | (struct sockaddr *)&sock_in, 1); |
1067 | if (rc >= 0) | |
dc58f760 | 1068 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); |
baa4d64b NB |
1069 | |
1070 | rc = conn->sock->ops->getname(conn->sock, | |
9b2c45d4 DV |
1071 | (struct sockaddr *)&sock_in, 0); |
1072 | if (rc >= 0) | |
69d75574 | 1073 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); |
baa4d64b NB |
1074 | } |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
1080 | { | |
1081 | struct iscsi_login_req *login_req; | |
1082 | u32 padding = 0, payload_length; | |
1083 | ||
1084 | if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) | |
1085 | return -1; | |
1086 | ||
1087 | login_req = (struct iscsi_login_req *)login->req; | |
1088 | payload_length = ntoh24(login_req->dlength); | |
1089 | padding = ((-payload_length) & 3); | |
1090 | ||
1091 | pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," | |
1092 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", | |
1093 | login_req->flags, login_req->itt, login_req->cmdsn, | |
1094 | login_req->exp_statsn, login_req->cid, payload_length); | |
1095 | /* | |
1096 | * Setup the initial iscsi_login values from the leading | |
1097 | * login request PDU. | |
1098 | */ | |
1099 | if (login->first_request) { | |
1100 | login_req = (struct iscsi_login_req *)login->req; | |
1101 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
3e1c81a9 | 1102 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
baa4d64b NB |
1103 | login->version_min = login_req->min_version; |
1104 | login->version_max = login_req->max_version; | |
1105 | memcpy(login->isid, login_req->isid, 6); | |
1106 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1107 | login->init_task_tag = login_req->itt; | |
1108 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1109 | login->cid = be16_to_cpu(login_req->cid); | |
1110 | login->tsih = be16_to_cpu(login_req->tsih); | |
1111 | } | |
1112 | ||
1113 | if (iscsi_target_check_login_request(conn, login) < 0) | |
1114 | return -1; | |
1115 | ||
1116 | memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); | |
1117 | if (iscsi_login_rx_data(conn, login->req_buf, | |
1118 | payload_length + padding) < 0) | |
1119 | return -1; | |
1120 | ||
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1125 | u32 length) | |
1126 | { | |
1127 | if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) | |
1128 | return -1; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | static int | |
1134 | iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) | |
1135 | { | |
1136 | int rc; | |
1137 | ||
1138 | if (!t->owner) { | |
1139 | conn->conn_transport = t; | |
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | rc = try_module_get(t->owner); | |
1144 | if (!rc) { | |
1145 | pr_err("try_module_get() failed for %s\n", t->name); | |
1146 | return -EINVAL; | |
1147 | } | |
1148 | ||
1149 | conn->conn_transport = t; | |
1150 | return 0; | |
1151 | } | |
1152 | ||
a91eb7d9 NB |
1153 | void iscsi_target_login_sess_out(struct iscsi_conn *conn, |
1154 | struct iscsi_np *np, bool zero_tsih, bool new_sess) | |
1155 | { | |
0bcc297e | 1156 | if (!new_sess) |
a91eb7d9 NB |
1157 | goto old_sess_out; |
1158 | ||
1159 | pr_err("iSCSI Login negotiation failed.\n"); | |
1160 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
1161 | ISCSI_LOGIN_STATUS_INIT_ERR); | |
1162 | if (!zero_tsih || !conn->sess) | |
1163 | goto old_sess_out; | |
1164 | if (conn->sess->se_sess) | |
1165 | transport_free_session(conn->sess->se_sess); | |
1166 | if (conn->sess->session_index != 0) { | |
1167 | spin_lock_bh(&sess_idr_lock); | |
1168 | idr_remove(&sess_idr, conn->sess->session_index); | |
1169 | spin_unlock_bh(&sess_idr_lock); | |
1170 | } | |
1171 | kfree(conn->sess->sess_ops); | |
1172 | kfree(conn->sess); | |
a0b3b9b2 | 1173 | conn->sess = NULL; |
a91eb7d9 NB |
1174 | |
1175 | old_sess_out: | |
1176 | iscsi_stop_login_thread_timer(np); | |
1177 | /* | |
1178 | * If login negotiation fails check if the Time2Retain timer | |
1179 | * needs to be restarted. | |
1180 | */ | |
1181 | if (!zero_tsih && conn->sess) { | |
1182 | spin_lock_bh(&conn->sess->conn_lock); | |
1183 | if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { | |
1184 | struct se_portal_group *se_tpg = | |
60bfcf8e | 1185 | &conn->tpg->tpg_se_tpg; |
a91eb7d9 NB |
1186 | |
1187 | atomic_set(&conn->sess->session_continuation, 0); | |
1188 | spin_unlock_bh(&conn->sess->conn_lock); | |
1189 | spin_lock_bh(&se_tpg->session_lock); | |
1190 | iscsit_start_time2retain_handler(conn->sess); | |
1191 | spin_unlock_bh(&se_tpg->session_lock); | |
1192 | } else | |
1193 | spin_unlock_bh(&conn->sess->conn_lock); | |
1194 | iscsit_dec_session_usage_count(conn->sess); | |
1195 | } | |
1196 | ||
69110e3c HX |
1197 | ahash_request_free(conn->conn_tx_hash); |
1198 | if (conn->conn_rx_hash) { | |
1199 | struct crypto_ahash *tfm; | |
1200 | ||
1201 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
1202 | ahash_request_free(conn->conn_rx_hash); | |
1203 | crypto_free_ahash(tfm); | |
1204 | } | |
a91eb7d9 | 1205 | |
fbecb659 | 1206 | free_cpumask_var(conn->conn_cpumask); |
a91eb7d9 NB |
1207 | |
1208 | kfree(conn->conn_ops); | |
1209 | ||
1210 | if (conn->param_list) { | |
1211 | iscsi_release_param_list(conn->param_list); | |
1212 | conn->param_list = NULL; | |
1213 | } | |
1214 | iscsi_target_nego_release(conn); | |
1215 | ||
1216 | if (conn->sock) { | |
1217 | sock_release(conn->sock); | |
1218 | conn->sock = NULL; | |
1219 | } | |
1220 | ||
954f2372 SG |
1221 | if (conn->conn_transport->iscsit_wait_conn) |
1222 | conn->conn_transport->iscsit_wait_conn(conn); | |
1223 | ||
a91eb7d9 NB |
1224 | if (conn->conn_transport->iscsit_free_conn) |
1225 | conn->conn_transport->iscsit_free_conn(conn); | |
1226 | ||
1227 | iscsit_put_transport(conn->conn_transport); | |
1228 | kfree(conn); | |
1229 | } | |
1230 | ||
e48354ce NB |
1231 | static int __iscsi_target_login_thread(struct iscsi_np *np) |
1232 | { | |
baa4d64b | 1233 | u8 *buffer, zero_tsih = 0; |
81a9c5e7 | 1234 | int ret = 0, rc; |
e48354ce NB |
1235 | struct iscsi_conn *conn = NULL; |
1236 | struct iscsi_login *login; | |
1237 | struct iscsi_portal_group *tpg = NULL; | |
e48354ce | 1238 | struct iscsi_login_req *pdu; |
a91eb7d9 NB |
1239 | struct iscsi_tpg_np *tpg_np; |
1240 | bool new_sess = false; | |
e48354ce NB |
1241 | |
1242 | flush_signals(current); | |
e48354ce NB |
1243 | |
1244 | spin_lock_bh(&np->np_thread_lock); | |
978d13d6 | 1245 | if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { |
e48354ce | 1246 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
978d13d6 | 1247 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce | 1248 | complete(&np->np_restart_comp); |
978d13d6 | 1249 | return 1; |
81a9c5e7 MP |
1250 | } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { |
1251 | spin_unlock_bh(&np->np_thread_lock); | |
1252 | goto exit; | |
e48354ce NB |
1253 | } else { |
1254 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1255 | } | |
1256 | spin_unlock_bh(&np->np_thread_lock); | |
1257 | ||
e48354ce NB |
1258 | conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
1259 | if (!conn) { | |
1260 | pr_err("Could not allocate memory for" | |
1261 | " new connection\n"); | |
e48354ce NB |
1262 | /* Get another socket */ |
1263 | return 1; | |
1264 | } | |
e48354ce NB |
1265 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
1266 | conn->conn_state = TARG_CONN_STATE_FREE; | |
e48354ce | 1267 | |
f7c9564a KC |
1268 | timer_setup(&conn->nopin_response_timer, |
1269 | iscsit_handle_nopin_response_timeout, 0); | |
1270 | timer_setup(&conn->nopin_timer, iscsit_handle_nopin_timeout, 0); | |
8a47aa9d | 1271 | |
baa4d64b NB |
1272 | if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
1273 | kfree(conn); | |
1274 | return 1; | |
1275 | } | |
e48354ce | 1276 | |
baa4d64b NB |
1277 | rc = np->np_transport->iscsit_accept_np(np, conn); |
1278 | if (rc == -ENOSYS) { | |
1279 | complete(&np->np_restart_comp); | |
1280 | iscsit_put_transport(conn->conn_transport); | |
1281 | kfree(conn); | |
1282 | conn = NULL; | |
1283 | goto exit; | |
1284 | } else if (rc < 0) { | |
1285 | spin_lock_bh(&np->np_thread_lock); | |
978d13d6 NB |
1286 | if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { |
1287 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
baa4d64b NB |
1288 | spin_unlock_bh(&np->np_thread_lock); |
1289 | complete(&np->np_restart_comp); | |
c9a03c12 NB |
1290 | iscsit_put_transport(conn->conn_transport); |
1291 | kfree(conn); | |
1292 | conn = NULL; | |
baa4d64b NB |
1293 | /* Get another socket */ |
1294 | return 1; | |
1295 | } | |
1296 | spin_unlock_bh(&np->np_thread_lock); | |
1297 | iscsit_put_transport(conn->conn_transport); | |
1298 | kfree(conn); | |
1299 | conn = NULL; | |
1300 | goto out; | |
e48354ce NB |
1301 | } |
1302 | /* | |
1303 | * Perform the remaining iSCSI connection initialization items.. | |
1304 | */ | |
baa4d64b NB |
1305 | login = iscsi_login_init_conn(conn); |
1306 | if (!login) { | |
e48354ce NB |
1307 | goto new_sess_out; |
1308 | } | |
1309 | ||
baa4d64b | 1310 | iscsi_start_login_thread_timer(np); |
e48354ce | 1311 | |
baa4d64b NB |
1312 | pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
1313 | conn->conn_state = TARG_CONN_STATE_XPT_UP; | |
1314 | /* | |
1315 | * This will process the first login request + payload.. | |
1316 | */ | |
1317 | rc = np->np_transport->iscsit_get_login_rx(conn, login); | |
1318 | if (rc == 1) | |
1319 | return 1; | |
1320 | else if (rc < 0) | |
1321 | goto new_sess_out; | |
66c7db68 | 1322 | |
baa4d64b NB |
1323 | buffer = &login->req[0]; |
1324 | pdu = (struct iscsi_login_req *)buffer; | |
e48354ce NB |
1325 | /* |
1326 | * Used by iscsit_tx_login_rsp() for Login Resonses PDUs | |
1327 | * when Status-Class != 0. | |
1328 | */ | |
baa4d64b | 1329 | conn->login_itt = pdu->itt; |
e48354ce NB |
1330 | |
1331 | spin_lock_bh(&np->np_thread_lock); | |
1332 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
1333 | spin_unlock_bh(&np->np_thread_lock); | |
69d75574 AG |
1334 | pr_err("iSCSI Network Portal on %pISpc currently not" |
1335 | " active.\n", &np->np_sockaddr); | |
e48354ce NB |
1336 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
1337 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); | |
1338 | goto new_sess_out; | |
1339 | } | |
1340 | spin_unlock_bh(&np->np_thread_lock); | |
1341 | ||
e48354ce NB |
1342 | conn->network_transport = np->np_network_transport; |
1343 | ||
dc58f760 AG |
1344 | pr_debug("Received iSCSI login request from %pISpc on %s Network" |
1345 | " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, | |
69d75574 | 1346 | &conn->local_sockaddr); |
e48354ce NB |
1347 | |
1348 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); | |
1349 | conn->conn_state = TARG_CONN_STATE_IN_LOGIN; | |
1350 | ||
1351 | if (iscsi_login_check_initiator_version(conn, pdu->max_version, | |
1352 | pdu->min_version) < 0) | |
1353 | goto new_sess_out; | |
1354 | ||
1355 | zero_tsih = (pdu->tsih == 0x0000); | |
ee1b1b9c | 1356 | if (zero_tsih) { |
e48354ce NB |
1357 | /* |
1358 | * This is the leading connection of a new session. | |
1359 | * We wait until after authentication to check for | |
1360 | * session reinstatement. | |
1361 | */ | |
1362 | if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) | |
1363 | goto new_sess_out; | |
1364 | } else { | |
1365 | /* | |
1366 | * Add a new connection to an existing session. | |
1367 | * We check for a non-existant session in | |
1368 | * iscsi_login_non_zero_tsih_s2() below based | |
1369 | * on ISID/TSIH, but wait until after authentication | |
1370 | * to check for connection reinstatement, etc. | |
1371 | */ | |
1372 | if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) | |
1373 | goto new_sess_out; | |
1374 | } | |
e48354ce | 1375 | /* |
baa4d64b NB |
1376 | * SessionType: Discovery |
1377 | * | |
1378 | * Locates Default Portal | |
1379 | * | |
1380 | * SessionType: Normal | |
1381 | * | |
1382 | * Locates Target Portal from NP -> Target IQN | |
e48354ce | 1383 | */ |
baa4d64b NB |
1384 | rc = iscsi_target_locate_portal(np, conn, login); |
1385 | if (rc < 0) { | |
e48354ce NB |
1386 | tpg = conn->tpg; |
1387 | goto new_sess_out; | |
1388 | } | |
a91eb7d9 | 1389 | login->zero_tsih = zero_tsih; |
e48354ce | 1390 | |
8abc718d FL |
1391 | if (conn->sess) |
1392 | conn->sess->se_sess->sup_prot_ops = | |
1393 | conn->conn_transport->iscsit_get_sup_prot_ops(conn); | |
23a548ee | 1394 | |
e48354ce NB |
1395 | tpg = conn->tpg; |
1396 | if (!tpg) { | |
1397 | pr_err("Unable to locate struct iscsi_conn->tpg\n"); | |
1398 | goto new_sess_out; | |
1399 | } | |
1400 | ||
1401 | if (zero_tsih) { | |
baa4d64b | 1402 | if (iscsi_login_zero_tsih_s2(conn) < 0) |
e48354ce | 1403 | goto new_sess_out; |
e48354ce | 1404 | } else { |
baa4d64b | 1405 | if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
e48354ce | 1406 | goto old_sess_out; |
e48354ce NB |
1407 | } |
1408 | ||
42bc3e57 VP |
1409 | if (conn->conn_transport->iscsit_validate_params) { |
1410 | ret = conn->conn_transport->iscsit_validate_params(conn); | |
1411 | if (ret < 0) { | |
1412 | if (zero_tsih) | |
1413 | goto new_sess_out; | |
1414 | else | |
1415 | goto old_sess_out; | |
1416 | } | |
1417 | } | |
1418 | ||
a91eb7d9 NB |
1419 | ret = iscsi_target_start_negotiation(login, conn); |
1420 | if (ret < 0) | |
e48354ce NB |
1421 | goto new_sess_out; |
1422 | ||
e48354ce NB |
1423 | iscsi_stop_login_thread_timer(np); |
1424 | ||
a91eb7d9 NB |
1425 | if (ret == 1) { |
1426 | tpg_np = conn->tpg_np; | |
e48354ce | 1427 | |
e5419865 | 1428 | iscsi_post_login_handler(np, conn, zero_tsih); |
a91eb7d9 NB |
1429 | iscsit_deaccess_np(np, tpg, tpg_np); |
1430 | } | |
e48354ce | 1431 | |
e48354ce | 1432 | tpg = NULL; |
a91eb7d9 | 1433 | tpg_np = NULL; |
e48354ce NB |
1434 | /* Get another socket */ |
1435 | return 1; | |
1436 | ||
1437 | new_sess_out: | |
a91eb7d9 | 1438 | new_sess = true; |
e48354ce | 1439 | old_sess_out: |
a91eb7d9 NB |
1440 | tpg_np = conn->tpg_np; |
1441 | iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); | |
1442 | new_sess = false; | |
e48354ce NB |
1443 | |
1444 | if (tpg) { | |
a91eb7d9 | 1445 | iscsit_deaccess_np(np, tpg, tpg_np); |
e48354ce | 1446 | tpg = NULL; |
a91eb7d9 | 1447 | tpg_np = NULL; |
e48354ce NB |
1448 | } |
1449 | ||
1450 | out: | |
81a9c5e7 MP |
1451 | return 1; |
1452 | ||
baa4d64b | 1453 | exit: |
e48354ce NB |
1454 | iscsi_stop_login_thread_timer(np); |
1455 | spin_lock_bh(&np->np_thread_lock); | |
1456 | np->np_thread_state = ISCSI_NP_THREAD_EXIT; | |
1457 | spin_unlock_bh(&np->np_thread_lock); | |
baa4d64b | 1458 | |
e48354ce NB |
1459 | return 0; |
1460 | } | |
1461 | ||
1462 | int iscsi_target_login_thread(void *arg) | |
1463 | { | |
8359cf43 | 1464 | struct iscsi_np *np = arg; |
e48354ce NB |
1465 | int ret; |
1466 | ||
1467 | allow_signal(SIGINT); | |
1468 | ||
81a9c5e7 | 1469 | while (1) { |
e48354ce NB |
1470 | ret = __iscsi_target_login_thread(np); |
1471 | /* | |
1472 | * We break and exit here unless another sock_accept() call | |
1473 | * is expected. | |
1474 | */ | |
1475 | if (ret != 1) | |
1476 | break; | |
1477 | } | |
1478 | ||
5e0cf5e6 JY |
1479 | while (!kthread_should_stop()) { |
1480 | msleep(100); | |
1481 | } | |
1482 | ||
e48354ce NB |
1483 | return 0; |
1484 | } |