Commit | Line | Data |
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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains the login functions used by the iSCSI Target driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
69110e3c | 19 | #include <crypto/hash.h> |
e48354ce NB |
20 | #include <linux/string.h> |
21 | #include <linux/kthread.h> | |
40401530 | 22 | #include <linux/idr.h> |
e48354ce NB |
23 | #include <scsi/iscsi_proto.h> |
24 | #include <target/target_core_base.h> | |
c4795fb2 | 25 | #include <target/target_core_fabric.h> |
e48354ce | 26 | |
67f091f2 SG |
27 | #include <target/iscsi/iscsi_target_core.h> |
28 | #include <target/iscsi/iscsi_target_stat.h> | |
e48354ce NB |
29 | #include "iscsi_target_device.h" |
30 | #include "iscsi_target_nego.h" | |
31 | #include "iscsi_target_erl0.h" | |
32 | #include "iscsi_target_erl2.h" | |
33 | #include "iscsi_target_login.h" | |
e48354ce NB |
34 | #include "iscsi_target_tpg.h" |
35 | #include "iscsi_target_util.h" | |
36 | #include "iscsi_target.h" | |
37 | #include "iscsi_target_parameters.h" | |
38 | ||
baa4d64b NB |
39 | #include <target/iscsi/iscsi_transport.h> |
40 | ||
41 | static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) | |
e48354ce | 42 | { |
baa4d64b NB |
43 | struct iscsi_login *login; |
44 | ||
45 | login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); | |
46 | if (!login) { | |
47 | pr_err("Unable to allocate memory for struct iscsi_login.\n"); | |
48 | return NULL; | |
49 | } | |
a91eb7d9 | 50 | conn->login = login; |
baa4d64b NB |
51 | login->conn = conn; |
52 | login->first_request = 1; | |
53 | ||
54 | login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
55 | if (!login->req_buf) { | |
56 | pr_err("Unable to allocate memory for response buffer.\n"); | |
57 | goto out_login; | |
58 | } | |
59 | ||
60 | login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); | |
61 | if (!login->rsp_buf) { | |
62 | pr_err("Unable to allocate memory for request buffer.\n"); | |
63 | goto out_req_buf; | |
64 | } | |
65 | ||
66 | conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); | |
67 | if (!conn->conn_ops) { | |
68 | pr_err("Unable to allocate memory for" | |
69 | " struct iscsi_conn_ops.\n"); | |
70 | goto out_rsp_buf; | |
71 | } | |
72 | ||
d5627acb | 73 | init_waitqueue_head(&conn->queues_wq); |
e48354ce NB |
74 | INIT_LIST_HEAD(&conn->conn_list); |
75 | INIT_LIST_HEAD(&conn->conn_cmd_list); | |
76 | INIT_LIST_HEAD(&conn->immed_queue_list); | |
77 | INIT_LIST_HEAD(&conn->response_queue_list); | |
78 | init_completion(&conn->conn_post_wait_comp); | |
79 | init_completion(&conn->conn_wait_comp); | |
80 | init_completion(&conn->conn_wait_rcfr_comp); | |
81 | init_completion(&conn->conn_waiting_on_uc_comp); | |
82 | init_completion(&conn->conn_logout_comp); | |
83 | init_completion(&conn->rx_half_close_comp); | |
84 | init_completion(&conn->tx_half_close_comp); | |
e5419865 | 85 | init_completion(&conn->rx_login_comp); |
e48354ce NB |
86 | spin_lock_init(&conn->cmd_lock); |
87 | spin_lock_init(&conn->conn_usage_lock); | |
88 | spin_lock_init(&conn->immed_queue_lock); | |
89 | spin_lock_init(&conn->nopin_timer_lock); | |
90 | spin_lock_init(&conn->response_queue_lock); | |
91 | spin_lock_init(&conn->state_lock); | |
92 | ||
93 | if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { | |
94 | pr_err("Unable to allocate conn->conn_cpumask\n"); | |
baa4d64b | 95 | goto out_conn_ops; |
e48354ce | 96 | } |
baa4d64b | 97 | conn->conn_login = login; |
e48354ce | 98 | |
baa4d64b NB |
99 | return login; |
100 | ||
101 | out_conn_ops: | |
102 | kfree(conn->conn_ops); | |
103 | out_rsp_buf: | |
104 | kfree(login->rsp_buf); | |
105 | out_req_buf: | |
106 | kfree(login->req_buf); | |
107 | out_login: | |
108 | kfree(login); | |
109 | return NULL; | |
e48354ce NB |
110 | } |
111 | ||
112 | /* | |
113 | * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup | |
114 | * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel | |
115 | */ | |
116 | int iscsi_login_setup_crypto(struct iscsi_conn *conn) | |
117 | { | |
69110e3c HX |
118 | struct crypto_ahash *tfm; |
119 | ||
e48354ce NB |
120 | /* |
121 | * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts | |
122 | * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback | |
123 | * to software 1x8 byte slicing from crc32c.ko | |
124 | */ | |
69110e3c HX |
125 | tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); |
126 | if (IS_ERR(tfm)) { | |
127 | pr_err("crypto_alloc_ahash() failed\n"); | |
e48354ce NB |
128 | return -ENOMEM; |
129 | } | |
130 | ||
69110e3c HX |
131 | conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL); |
132 | if (!conn->conn_rx_hash) { | |
133 | pr_err("ahash_request_alloc() failed for conn_rx_hash\n"); | |
134 | crypto_free_ahash(tfm); | |
135 | return -ENOMEM; | |
136 | } | |
137 | ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL); | |
138 | ||
139 | conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL); | |
140 | if (!conn->conn_tx_hash) { | |
141 | pr_err("ahash_request_alloc() failed for conn_tx_hash\n"); | |
142 | ahash_request_free(conn->conn_rx_hash); | |
143 | conn->conn_rx_hash = NULL; | |
144 | crypto_free_ahash(tfm); | |
e48354ce NB |
145 | return -ENOMEM; |
146 | } | |
69110e3c | 147 | ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); |
e48354ce NB |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int iscsi_login_check_initiator_version( | |
153 | struct iscsi_conn *conn, | |
154 | u8 version_max, | |
155 | u8 version_min) | |
156 | { | |
157 | if ((version_max != 0x00) || (version_min != 0x00)) { | |
158 | pr_err("Unsupported iSCSI IETF Pre-RFC Revision," | |
159 | " version Min/Max 0x%02x/0x%02x, rejecting login.\n", | |
160 | version_min, version_max); | |
161 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
162 | ISCSI_LOGIN_STATUS_NO_VERSION); | |
163 | return -1; | |
164 | } | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) | |
170 | { | |
171 | int sessiontype; | |
172 | struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; | |
173 | struct iscsi_portal_group *tpg = conn->tpg; | |
174 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
175 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
176 | struct se_session *se_sess, *se_sess_tmp; | |
177 | ||
178 | initiatorname_param = iscsi_find_param_from_key( | |
179 | INITIATORNAME, conn->param_list); | |
e48354ce NB |
180 | sessiontype_param = iscsi_find_param_from_key( |
181 | SESSIONTYPE, conn->param_list); | |
1c5c12c6 RD |
182 | if (!initiatorname_param || !sessiontype_param) { |
183 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
184 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); | |
e48354ce | 185 | return -1; |
1c5c12c6 | 186 | } |
e48354ce NB |
187 | |
188 | sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; | |
189 | ||
190 | spin_lock_bh(&se_tpg->session_lock); | |
191 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
192 | sess_list) { | |
193 | ||
8359cf43 | 194 | sess_p = se_sess->fabric_sess_ptr; |
e48354ce NB |
195 | spin_lock(&sess_p->conn_lock); |
196 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
197 | atomic_read(&sess_p->session_logout) || | |
198 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
199 | spin_unlock(&sess_p->conn_lock); | |
200 | continue; | |
201 | } | |
8359cf43 JE |
202 | if (!memcmp(sess_p->isid, conn->sess->isid, 6) && |
203 | (!strcmp(sess_p->sess_ops->InitiatorName, | |
204 | initiatorname_param->value) && | |
e48354ce NB |
205 | (sess_p->sess_ops->SessionType == sessiontype))) { |
206 | atomic_set(&sess_p->session_reinstatement, 1); | |
207 | spin_unlock(&sess_p->conn_lock); | |
208 | iscsit_inc_session_usage_count(sess_p); | |
209 | iscsit_stop_time2retain_timer(sess_p); | |
210 | sess = sess_p; | |
211 | break; | |
212 | } | |
213 | spin_unlock(&sess_p->conn_lock); | |
214 | } | |
215 | spin_unlock_bh(&se_tpg->session_lock); | |
216 | /* | |
217 | * If the Time2Retain handler has expired, the session is already gone. | |
218 | */ | |
219 | if (!sess) | |
220 | return 0; | |
221 | ||
222 | pr_debug("%s iSCSI Session SID %u is still active for %s," | |
223 | " preforming session reinstatement.\n", (sessiontype) ? | |
224 | "Discovery" : "Normal", sess->sid, | |
225 | sess->sess_ops->InitiatorName); | |
226 | ||
227 | spin_lock_bh(&sess->conn_lock); | |
228 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
229 | spin_unlock_bh(&sess->conn_lock); | |
230 | iscsit_dec_session_usage_count(sess); | |
99367f01 NB |
231 | target_put_session(sess->se_sess); |
232 | return 0; | |
e48354ce NB |
233 | } |
234 | spin_unlock_bh(&sess->conn_lock); | |
235 | ||
236 | iscsit_stop_session(sess, 1, 1); | |
237 | iscsit_dec_session_usage_count(sess); | |
238 | ||
99367f01 NB |
239 | target_put_session(sess->se_sess); |
240 | return 0; | |
e48354ce NB |
241 | } |
242 | ||
243 | static void iscsi_login_set_conn_values( | |
244 | struct iscsi_session *sess, | |
245 | struct iscsi_conn *conn, | |
50e5c87d | 246 | __be16 cid) |
e48354ce NB |
247 | { |
248 | conn->sess = sess; | |
50e5c87d | 249 | conn->cid = be16_to_cpu(cid); |
e48354ce NB |
250 | /* |
251 | * Generate a random Status sequence number (statsn) for the new | |
252 | * iSCSI connection. | |
253 | */ | |
254 | get_random_bytes(&conn->stat_sn, sizeof(u32)); | |
255 | ||
256 | mutex_lock(&auth_id_lock); | |
257 | conn->auth_id = iscsit_global->auth_id++; | |
258 | mutex_unlock(&auth_id_lock); | |
259 | } | |
260 | ||
79d59d08 RD |
261 | static __printf(2, 3) int iscsi_change_param_sprintf( |
262 | struct iscsi_conn *conn, | |
263 | const char *fmt, ...) | |
264 | { | |
265 | va_list args; | |
266 | unsigned char buf[64]; | |
267 | ||
268 | memset(buf, 0, sizeof buf); | |
269 | ||
270 | va_start(args, fmt); | |
271 | vsnprintf(buf, sizeof buf, fmt, args); | |
272 | va_end(args); | |
273 | ||
274 | if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { | |
275 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
276 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
277 | return -1; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
e48354ce NB |
283 | /* |
284 | * This is the leading connection of a new session, | |
285 | * or session reinstatement. | |
286 | */ | |
287 | static int iscsi_login_zero_tsih_s1( | |
288 | struct iscsi_conn *conn, | |
289 | unsigned char *buf) | |
290 | { | |
291 | struct iscsi_session *sess = NULL; | |
292 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
13b5533a | 293 | int ret; |
e48354ce NB |
294 | |
295 | sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); | |
296 | if (!sess) { | |
297 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
298 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
299 | pr_err("Could not allocate memory for session\n"); | |
0957627a | 300 | return -ENOMEM; |
e48354ce NB |
301 | } |
302 | ||
303 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
304 | sess->init_task_tag = pdu->itt; | |
8359cf43 | 305 | memcpy(&sess->isid, pdu->isid, 6); |
50e5c87d | 306 | sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
e48354ce NB |
307 | INIT_LIST_HEAD(&sess->sess_conn_list); |
308 | INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); | |
309 | INIT_LIST_HEAD(&sess->cr_active_list); | |
310 | INIT_LIST_HEAD(&sess->cr_inactive_list); | |
311 | init_completion(&sess->async_msg_comp); | |
312 | init_completion(&sess->reinstatement_comp); | |
313 | init_completion(&sess->session_wait_comp); | |
314 | init_completion(&sess->session_waiting_on_uc_comp); | |
315 | mutex_init(&sess->cmdsn_mutex); | |
316 | spin_lock_init(&sess->conn_lock); | |
317 | spin_lock_init(&sess->cr_a_lock); | |
318 | spin_lock_init(&sess->cr_i_lock); | |
319 | spin_lock_init(&sess->session_usage_lock); | |
320 | spin_lock_init(&sess->ttt_lock); | |
321 | ||
c9365bd0 | 322 | idr_preload(GFP_KERNEL); |
998866b0 | 323 | spin_lock_bh(&sess_idr_lock); |
c9365bd0 TH |
324 | ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
325 | if (ret >= 0) | |
326 | sess->session_index = ret; | |
998866b0 | 327 | spin_unlock_bh(&sess_idr_lock); |
c9365bd0 | 328 | idr_preload_end(); |
e48354ce | 329 | |
13b5533a | 330 | if (ret < 0) { |
c9365bd0 | 331 | pr_err("idr_alloc() for sess_idr failed\n"); |
13b5533a BW |
332 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
333 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
334 | kfree(sess); | |
335 | return -ENOMEM; | |
336 | } | |
337 | ||
e48354ce | 338 | sess->creation_time = get_jiffies_64(); |
e48354ce NB |
339 | /* |
340 | * The FFP CmdSN window values will be allocated from the TPG's | |
341 | * Initiator Node's ACL once the login has been successfully completed. | |
342 | */ | |
109e2381 | 343 | atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); |
e48354ce NB |
344 | |
345 | sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); | |
346 | if (!sess->sess_ops) { | |
347 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
348 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
349 | pr_err("Unable to allocate memory for" | |
350 | " struct iscsi_sess_ops.\n"); | |
0957627a NB |
351 | kfree(sess); |
352 | return -ENOMEM; | |
e48354ce NB |
353 | } |
354 | ||
23a548ee | 355 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
0957627a | 356 | if (IS_ERR(sess->se_sess)) { |
e48354ce NB |
357 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
358 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
a928d28d | 359 | kfree(sess->sess_ops); |
0957627a NB |
360 | kfree(sess); |
361 | return -ENOMEM; | |
e48354ce NB |
362 | } |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | static int iscsi_login_zero_tsih_s2( | |
368 | struct iscsi_conn *conn) | |
369 | { | |
370 | struct iscsi_node_attrib *na; | |
371 | struct iscsi_session *sess = conn->sess; | |
03aa2070 | 372 | bool iser = false; |
e48354ce NB |
373 | |
374 | sess->tpg = conn->tpg; | |
375 | ||
376 | /* | |
377 | * Assign a new TPG Session Handle. Note this is protected with | |
378 | * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). | |
379 | */ | |
60bfcf8e | 380 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce | 381 | if (!sess->tsih) |
60bfcf8e | 382 | sess->tsih = ++sess->tpg->ntsih; |
e48354ce NB |
383 | |
384 | /* | |
385 | * Create the default params from user defined values.. | |
386 | */ | |
387 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 388 | conn->tpg->param_list, 1) < 0) { |
e48354ce NB |
389 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
390 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
391 | return -1; | |
392 | } | |
393 | ||
03aa2070 NB |
394 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
395 | iser = true; | |
396 | ||
397 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
398 | |
399 | if (sess->sess_ops->SessionType) | |
400 | return iscsi_set_keys_irrelevant_for_discovery( | |
401 | conn->param_list); | |
402 | ||
403 | na = iscsit_tpg_get_node_attrib(sess); | |
404 | ||
405 | /* | |
406 | * Need to send TargetPortalGroupTag back in first login response | |
407 | * on any iSCSI connection where the Initiator provides TargetName. | |
408 | * See 5.3.1. Login Phase Start | |
409 | * | |
410 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
411 | */ | |
79d59d08 | 412 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 413 | return -1; |
e48354ce NB |
414 | |
415 | /* | |
416 | * Workaround for Initiators that have broken connection recovery logic. | |
417 | * | |
418 | * "We would really like to get rid of this." Linux-iSCSI.org team | |
419 | */ | |
79d59d08 | 420 | if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) |
e48354ce | 421 | return -1; |
e48354ce | 422 | |
03aa2070 NB |
423 | /* |
424 | * Set RDMAExtensions=Yes by default for iSER enabled network portals | |
425 | */ | |
426 | if (iser) { | |
427 | struct iscsi_param *param; | |
428 | unsigned long mrdsl, off; | |
429 | int rc; | |
430 | ||
79d59d08 | 431 | if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) |
03aa2070 | 432 | return -1; |
79d59d08 | 433 | |
03aa2070 NB |
434 | /* |
435 | * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for | |
436 | * Immediate Data + Unsolicitied Data-OUT if necessary.. | |
437 | */ | |
438 | param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", | |
439 | conn->param_list); | |
440 | if (!param) { | |
441 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
442 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
443 | return -1; | |
444 | } | |
57103d7f | 445 | rc = kstrtoul(param->value, 0, &mrdsl); |
03aa2070 NB |
446 | if (rc < 0) { |
447 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, | |
448 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
449 | return -1; | |
450 | } | |
451 | off = mrdsl % PAGE_SIZE; | |
452 | if (!off) | |
52d0aa79 | 453 | goto check_prot; |
03aa2070 NB |
454 | |
455 | if (mrdsl < PAGE_SIZE) | |
456 | mrdsl = PAGE_SIZE; | |
457 | else | |
458 | mrdsl -= off; | |
459 | ||
460 | pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" | |
461 | " to PAGE_SIZE\n", mrdsl); | |
462 | ||
79d59d08 | 463 | if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) |
03aa2070 | 464 | return -1; |
52d0aa79 NB |
465 | /* |
466 | * ISER currently requires that ImmediateData + Unsolicited | |
467 | * Data be disabled when protection / signature MRs are enabled. | |
468 | */ | |
469 | check_prot: | |
470 | if (sess->se_sess->sup_prot_ops & | |
471 | (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | | |
472 | TARGET_PROT_DOUT_INSERT)) { | |
473 | ||
79d59d08 | 474 | if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) |
52d0aa79 | 475 | return -1; |
52d0aa79 | 476 | |
79d59d08 | 477 | if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) |
52d0aa79 | 478 | return -1; |
79d59d08 | 479 | |
52d0aa79 NB |
480 | pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" |
481 | " T10-PI enabled ISER session\n"); | |
482 | } | |
03aa2070 | 483 | } |
e48354ce NB |
484 | |
485 | return 0; | |
486 | } | |
487 | ||
e48354ce NB |
488 | static int iscsi_login_non_zero_tsih_s1( |
489 | struct iscsi_conn *conn, | |
490 | unsigned char *buf) | |
491 | { | |
492 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
493 | ||
494 | iscsi_login_set_conn_values(NULL, conn, pdu->cid); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Add a new connection to an existing session. | |
500 | */ | |
501 | static int iscsi_login_non_zero_tsih_s2( | |
502 | struct iscsi_conn *conn, | |
503 | unsigned char *buf) | |
504 | { | |
505 | struct iscsi_portal_group *tpg = conn->tpg; | |
506 | struct iscsi_session *sess = NULL, *sess_p = NULL; | |
507 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
508 | struct se_session *se_sess, *se_sess_tmp; | |
509 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; | |
03aa2070 | 510 | bool iser = false; |
e48354ce NB |
511 | |
512 | spin_lock_bh(&se_tpg->session_lock); | |
513 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
514 | sess_list) { | |
515 | ||
516 | sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
517 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || | |
518 | atomic_read(&sess_p->session_logout) || | |
519 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) | |
520 | continue; | |
8359cf43 | 521 | if (!memcmp(sess_p->isid, pdu->isid, 6) && |
50e5c87d | 522 | (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
e48354ce NB |
523 | iscsit_inc_session_usage_count(sess_p); |
524 | iscsit_stop_time2retain_timer(sess_p); | |
525 | sess = sess_p; | |
526 | break; | |
527 | } | |
528 | } | |
529 | spin_unlock_bh(&se_tpg->session_lock); | |
530 | ||
531 | /* | |
532 | * If the Time2Retain handler has expired, the session is already gone. | |
533 | */ | |
534 | if (!sess) { | |
535 | pr_err("Initiator attempting to add a connection to" | |
536 | " a non-existent session, rejecting iSCSI Login.\n"); | |
537 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
538 | ISCSI_LOGIN_STATUS_NO_SESSION); | |
539 | return -1; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Stop the Time2Retain timer if this is a failed session, we restart | |
544 | * the timer if the login is not successful. | |
545 | */ | |
546 | spin_lock_bh(&sess->conn_lock); | |
547 | if (sess->session_state == TARG_SESS_STATE_FAILED) | |
548 | atomic_set(&sess->session_continuation, 1); | |
549 | spin_unlock_bh(&sess->conn_lock); | |
550 | ||
551 | iscsi_login_set_conn_values(sess, conn, pdu->cid); | |
552 | ||
553 | if (iscsi_copy_param_list(&conn->param_list, | |
60bfcf8e | 554 | conn->tpg->param_list, 0) < 0) { |
e48354ce NB |
555 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
556 | ISCSI_LOGIN_STATUS_NO_RESOURCES); | |
557 | return -1; | |
558 | } | |
559 | ||
03aa2070 NB |
560 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
561 | iser = true; | |
562 | ||
563 | iscsi_set_keys_to_negotiate(conn->param_list, iser); | |
e48354ce NB |
564 | /* |
565 | * Need to send TargetPortalGroupTag back in first login response | |
566 | * on any iSCSI connection where the Initiator provides TargetName. | |
567 | * See 5.3.1. Login Phase Start | |
568 | * | |
569 | * In our case, we have already located the struct iscsi_tiqn at this point. | |
570 | */ | |
79d59d08 | 571 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
e48354ce | 572 | return -1; |
e48354ce | 573 | |
c04a6091 | 574 | return 0; |
e48354ce NB |
575 | } |
576 | ||
577 | int iscsi_login_post_auth_non_zero_tsih( | |
578 | struct iscsi_conn *conn, | |
579 | u16 cid, | |
580 | u32 exp_statsn) | |
581 | { | |
582 | struct iscsi_conn *conn_ptr = NULL; | |
583 | struct iscsi_conn_recovery *cr = NULL; | |
584 | struct iscsi_session *sess = conn->sess; | |
585 | ||
586 | /* | |
587 | * By following item 5 in the login table, if we have found | |
588 | * an existing ISID and a valid/existing TSIH and an existing | |
589 | * CID we do connection reinstatement. Currently we dont not | |
590 | * support it so we send back an non-zero status class to the | |
591 | * initiator and release the new connection. | |
592 | */ | |
593 | conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); | |
ee1b1b9c | 594 | if (conn_ptr) { |
e48354ce NB |
595 | pr_err("Connection exists with CID %hu for %s," |
596 | " performing connection reinstatement.\n", | |
597 | conn_ptr->cid, sess->sess_ops->InitiatorName); | |
598 | ||
599 | iscsit_connection_reinstatement_rcfr(conn_ptr); | |
600 | iscsit_dec_conn_usage_count(conn_ptr); | |
601 | } | |
602 | ||
603 | /* | |
604 | * Check for any connection recovery entires containing CID. | |
605 | * We use the original ExpStatSN sent in the first login request | |
606 | * to acknowledge commands for the failed connection. | |
607 | * | |
608 | * Also note that an explict logout may have already been sent, | |
609 | * but the response may not be sent due to additional connection | |
610 | * loss. | |
611 | */ | |
612 | if (sess->sess_ops->ErrorRecoveryLevel == 2) { | |
613 | cr = iscsit_get_inactive_connection_recovery_entry( | |
614 | sess, cid); | |
ee1b1b9c | 615 | if (cr) { |
e48354ce NB |
616 | pr_debug("Performing implicit logout" |
617 | " for connection recovery on CID: %hu\n", | |
618 | conn->cid); | |
619 | iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); | |
620 | } | |
621 | } | |
622 | ||
623 | /* | |
624 | * Else we follow item 4 from the login table in that we have | |
625 | * found an existing ISID and a valid/existing TSIH and a new | |
626 | * CID we go ahead and continue to add a new connection to the | |
627 | * session. | |
628 | */ | |
629 | pr_debug("Adding CID %hu to existing session for %s.\n", | |
630 | cid, sess->sess_ops->InitiatorName); | |
631 | ||
632 | if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { | |
633 | pr_err("Adding additional connection to this session" | |
634 | " would exceed MaxConnections %d, login failed.\n", | |
635 | sess->sess_ops->MaxConnections); | |
636 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
637 | ISCSI_LOGIN_STATUS_ISID_ERROR); | |
638 | return -1; | |
639 | } | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | static void iscsi_post_login_start_timers(struct iscsi_conn *conn) | |
645 | { | |
646 | struct iscsi_session *sess = conn->sess; | |
03aa2070 NB |
647 | /* |
648 | * FIXME: Unsolicitied NopIN support for ISER | |
649 | */ | |
650 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) | |
651 | return; | |
e48354ce NB |
652 | |
653 | if (!sess->sess_ops->SessionType) | |
654 | iscsit_start_nopin_timer(conn); | |
655 | } | |
656 | ||
e5419865 | 657 | int iscsit_start_kthreads(struct iscsi_conn *conn) |
88dcd2da NB |
658 | { |
659 | int ret = 0; | |
660 | ||
661 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
662 | conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, | |
663 | ISCSIT_BITMAP_BITS, get_order(1)); | |
664 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
665 | ||
666 | if (conn->bitmap_id < 0) { | |
667 | pr_err("bitmap_find_free_region() failed for" | |
668 | " iscsit_start_kthreads()\n"); | |
669 | return -ENOMEM; | |
670 | } | |
671 | ||
672 | conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, | |
673 | "%s", ISCSI_TX_THREAD_NAME); | |
674 | if (IS_ERR(conn->tx_thread)) { | |
675 | pr_err("Unable to start iscsi_target_tx_thread\n"); | |
676 | ret = PTR_ERR(conn->tx_thread); | |
677 | goto out_bitmap; | |
678 | } | |
679 | conn->tx_thread_active = true; | |
680 | ||
681 | conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, | |
682 | "%s", ISCSI_RX_THREAD_NAME); | |
683 | if (IS_ERR(conn->rx_thread)) { | |
684 | pr_err("Unable to start iscsi_target_rx_thread\n"); | |
685 | ret = PTR_ERR(conn->rx_thread); | |
686 | goto out_tx; | |
687 | } | |
688 | conn->rx_thread_active = true; | |
689 | ||
690 | return 0; | |
691 | out_tx: | |
e5419865 | 692 | send_sig(SIGINT, conn->tx_thread, 1); |
88dcd2da NB |
693 | kthread_stop(conn->tx_thread); |
694 | conn->tx_thread_active = false; | |
695 | out_bitmap: | |
696 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
697 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
698 | get_order(1)); | |
699 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
700 | return ret; | |
701 | } | |
702 | ||
e5419865 | 703 | void iscsi_post_login_handler( |
e48354ce NB |
704 | struct iscsi_np *np, |
705 | struct iscsi_conn *conn, | |
706 | u8 zero_tsih) | |
707 | { | |
708 | int stop_timer = 0; | |
709 | struct iscsi_session *sess = conn->sess; | |
710 | struct se_session *se_sess = sess->se_sess; | |
60bfcf8e | 711 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce | 712 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
e48354ce NB |
713 | |
714 | iscsit_inc_conn_usage_count(conn); | |
715 | ||
716 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, | |
717 | ISCSI_LOGIN_STATUS_ACCEPT); | |
718 | ||
719 | pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); | |
720 | conn->conn_state = TARG_CONN_STATE_LOGGED_IN; | |
721 | ||
722 | iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); | |
e48354ce NB |
723 | /* |
724 | * SCSI Initiator -> SCSI Target Port Mapping | |
725 | */ | |
e48354ce NB |
726 | if (!zero_tsih) { |
727 | iscsi_set_session_parameters(sess->sess_ops, | |
728 | conn->param_list, 0); | |
729 | iscsi_release_param_list(conn->param_list); | |
730 | conn->param_list = NULL; | |
731 | ||
732 | spin_lock_bh(&sess->conn_lock); | |
733 | atomic_set(&sess->session_continuation, 0); | |
734 | if (sess->session_state == TARG_SESS_STATE_FAILED) { | |
735 | pr_debug("Moving to" | |
736 | " TARG_SESS_STATE_LOGGED_IN.\n"); | |
737 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
738 | stop_timer = 1; | |
739 | } | |
740 | ||
dc58f760 AG |
741 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" |
742 | " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, | |
69d75574 | 743 | &conn->local_sockaddr, tpg->tpgt); |
e48354ce NB |
744 | |
745 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
746 | atomic_inc(&sess->nconn); | |
747 | pr_debug("Incremented iSCSI Connection count to %hu" | |
748 | " from node: %s\n", atomic_read(&sess->nconn), | |
749 | sess->sess_ops->InitiatorName); | |
750 | spin_unlock_bh(&sess->conn_lock); | |
751 | ||
88dcd2da | 752 | iscsi_post_login_start_timers(conn); |
e48354ce NB |
753 | /* |
754 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
755 | * are scheduled on the same CPU. | |
756 | */ | |
757 | iscsit_thread_get_cpumask(conn); | |
758 | conn->conn_rx_reset_cpumask = 1; | |
759 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
760 | /* |
761 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
762 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
763 | */ | |
764 | complete(&conn->rx_login_comp); | |
e48354ce | 765 | iscsit_dec_conn_usage_count(conn); |
e5419865 | 766 | |
e48354ce NB |
767 | if (stop_timer) { |
768 | spin_lock_bh(&se_tpg->session_lock); | |
769 | iscsit_stop_time2retain_timer(sess); | |
770 | spin_unlock_bh(&se_tpg->session_lock); | |
771 | } | |
772 | iscsit_dec_session_usage_count(sess); | |
e5419865 | 773 | return; |
e48354ce NB |
774 | } |
775 | ||
776 | iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); | |
777 | iscsi_release_param_list(conn->param_list); | |
778 | conn->param_list = NULL; | |
779 | ||
780 | iscsit_determine_maxcmdsn(sess); | |
781 | ||
782 | spin_lock_bh(&se_tpg->session_lock); | |
783 | __transport_register_session(&sess->tpg->tpg_se_tpg, | |
8359cf43 | 784 | se_sess->se_node_acl, se_sess, sess); |
e48354ce NB |
785 | pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
786 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; | |
787 | ||
dc58f760 AG |
788 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", |
789 | conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, | |
2f9bc894 | 790 | tpg->tpgt); |
e48354ce NB |
791 | |
792 | spin_lock_bh(&sess->conn_lock); | |
793 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); | |
794 | atomic_inc(&sess->nconn); | |
795 | pr_debug("Incremented iSCSI Connection count to %hu from node:" | |
796 | " %s\n", atomic_read(&sess->nconn), | |
797 | sess->sess_ops->InitiatorName); | |
798 | spin_unlock_bh(&sess->conn_lock); | |
799 | ||
800 | sess->sid = tpg->sid++; | |
801 | if (!sess->sid) | |
802 | sess->sid = tpg->sid++; | |
803 | pr_debug("Established iSCSI session from node: %s\n", | |
804 | sess->sess_ops->InitiatorName); | |
805 | ||
806 | tpg->nsessions++; | |
807 | if (tpg->tpg_tiqn) | |
808 | tpg->tpg_tiqn->tiqn_nsessions++; | |
809 | ||
810 | pr_debug("Incremented number of active iSCSI sessions to %u on" | |
811 | " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); | |
812 | spin_unlock_bh(&se_tpg->session_lock); | |
813 | ||
814 | iscsi_post_login_start_timers(conn); | |
e48354ce NB |
815 | /* |
816 | * Determine CPU mask to ensure connection's RX and TX kthreads | |
817 | * are scheduled on the same CPU. | |
818 | */ | |
819 | iscsit_thread_get_cpumask(conn); | |
820 | conn->conn_rx_reset_cpumask = 1; | |
821 | conn->conn_tx_reset_cpumask = 1; | |
e5419865 NB |
822 | /* |
823 | * Wakeup the sleeping iscsi_target_rx_thread() now that | |
824 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. | |
825 | */ | |
826 | complete(&conn->rx_login_comp); | |
e48354ce | 827 | iscsit_dec_conn_usage_count(conn); |
e48354ce NB |
828 | } |
829 | ||
830 | static void iscsi_handle_login_thread_timeout(unsigned long data) | |
831 | { | |
832 | struct iscsi_np *np = (struct iscsi_np *) data; | |
833 | ||
834 | spin_lock_bh(&np->np_thread_lock); | |
69d75574 AG |
835 | pr_err("iSCSI Login timeout on Network Portal %pISpc\n", |
836 | &np->np_sockaddr); | |
e48354ce NB |
837 | |
838 | if (np->np_login_timer_flags & ISCSI_TF_STOP) { | |
839 | spin_unlock_bh(&np->np_thread_lock); | |
840 | return; | |
841 | } | |
842 | ||
843 | if (np->np_thread) | |
844 | send_sig(SIGINT, np->np_thread, 1); | |
845 | ||
846 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
847 | spin_unlock_bh(&np->np_thread_lock); | |
848 | } | |
849 | ||
850 | static void iscsi_start_login_thread_timer(struct iscsi_np *np) | |
851 | { | |
852 | /* | |
853 | * This used the TA_LOGIN_TIMEOUT constant because at this | |
854 | * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout | |
855 | */ | |
856 | spin_lock_bh(&np->np_thread_lock); | |
857 | init_timer(&np->np_login_timer); | |
858 | np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); | |
859 | np->np_login_timer.data = (unsigned long)np; | |
860 | np->np_login_timer.function = iscsi_handle_login_thread_timeout; | |
861 | np->np_login_timer_flags &= ~ISCSI_TF_STOP; | |
862 | np->np_login_timer_flags |= ISCSI_TF_RUNNING; | |
863 | add_timer(&np->np_login_timer); | |
864 | ||
865 | pr_debug("Added timeout timer to iSCSI login request for" | |
866 | " %u seconds.\n", TA_LOGIN_TIMEOUT); | |
867 | spin_unlock_bh(&np->np_thread_lock); | |
868 | } | |
869 | ||
870 | static void iscsi_stop_login_thread_timer(struct iscsi_np *np) | |
871 | { | |
872 | spin_lock_bh(&np->np_thread_lock); | |
873 | if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { | |
874 | spin_unlock_bh(&np->np_thread_lock); | |
875 | return; | |
876 | } | |
877 | np->np_login_timer_flags |= ISCSI_TF_STOP; | |
878 | spin_unlock_bh(&np->np_thread_lock); | |
879 | ||
880 | del_timer_sync(&np->np_login_timer); | |
881 | ||
882 | spin_lock_bh(&np->np_thread_lock); | |
883 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; | |
884 | spin_unlock_bh(&np->np_thread_lock); | |
885 | } | |
886 | ||
baa4d64b | 887 | int iscsit_setup_np( |
e48354ce | 888 | struct iscsi_np *np, |
13a3cf08 | 889 | struct sockaddr_storage *sockaddr) |
e48354ce | 890 | { |
baa4d64b | 891 | struct socket *sock = NULL; |
837f6452 | 892 | int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; |
e48354ce NB |
893 | |
894 | switch (np->np_network_transport) { | |
895 | case ISCSI_TCP: | |
896 | np->np_ip_proto = IPPROTO_TCP; | |
897 | np->np_sock_type = SOCK_STREAM; | |
898 | break; | |
899 | case ISCSI_SCTP_TCP: | |
900 | np->np_ip_proto = IPPROTO_SCTP; | |
901 | np->np_sock_type = SOCK_STREAM; | |
902 | break; | |
903 | case ISCSI_SCTP_UDP: | |
904 | np->np_ip_proto = IPPROTO_SCTP; | |
905 | np->np_sock_type = SOCK_SEQPACKET; | |
906 | break; | |
e48354ce NB |
907 | default: |
908 | pr_err("Unsupported network_transport: %d\n", | |
909 | np->np_network_transport); | |
910 | return -EINVAL; | |
911 | } | |
912 | ||
baa4d64b NB |
913 | np->np_ip_proto = IPPROTO_TCP; |
914 | np->np_sock_type = SOCK_STREAM; | |
915 | ||
e48354ce NB |
916 | ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
917 | np->np_ip_proto, &sock); | |
918 | if (ret < 0) { | |
919 | pr_err("sock_create() failed.\n"); | |
920 | return ret; | |
921 | } | |
922 | np->np_socket = sock; | |
e48354ce NB |
923 | /* |
924 | * Setup the np->np_sockaddr from the passed sockaddr setup | |
925 | * in iscsi_target_configfs.c code.. | |
926 | */ | |
8359cf43 | 927 | memcpy(&np->np_sockaddr, sockaddr, |
13a3cf08 | 928 | sizeof(struct sockaddr_storage)); |
e48354ce NB |
929 | |
930 | if (sockaddr->ss_family == AF_INET6) | |
931 | len = sizeof(struct sockaddr_in6); | |
932 | else | |
933 | len = sizeof(struct sockaddr_in); | |
934 | /* | |
935 | * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. | |
936 | */ | |
8359cf43 | 937 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
938 | opt = 1; |
939 | if (np->np_network_transport == ISCSI_TCP) { | |
940 | ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, | |
941 | (char *)&opt, sizeof(opt)); | |
942 | if (ret < 0) { | |
943 | pr_err("kernel_setsockopt() for TCP_NODELAY" | |
944 | " failed: %d\n", ret); | |
945 | goto fail; | |
946 | } | |
947 | } | |
948 | ||
8359cf43 | 949 | /* FIXME: Someone please explain why this is endian-safe */ |
e48354ce NB |
950 | ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
951 | (char *)&opt, sizeof(opt)); | |
952 | if (ret < 0) { | |
953 | pr_err("kernel_setsockopt() for SO_REUSEADDR" | |
954 | " failed\n"); | |
955 | goto fail; | |
956 | } | |
957 | ||
9f9ef6d3 DK |
958 | ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
959 | (char *)&opt, sizeof(opt)); | |
960 | if (ret < 0) { | |
961 | pr_err("kernel_setsockopt() for IP_FREEBIND" | |
962 | " failed\n"); | |
963 | goto fail; | |
964 | } | |
965 | ||
e48354ce NB |
966 | ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
967 | if (ret < 0) { | |
968 | pr_err("kernel_bind() failed: %d\n", ret); | |
969 | goto fail; | |
970 | } | |
971 | ||
972 | ret = kernel_listen(sock, backlog); | |
973 | if (ret != 0) { | |
974 | pr_err("kernel_listen() failed: %d\n", ret); | |
975 | goto fail; | |
976 | } | |
977 | ||
978 | return 0; | |
e48354ce NB |
979 | fail: |
980 | np->np_socket = NULL; | |
94e16e9c | 981 | sock_release(sock); |
e48354ce NB |
982 | return ret; |
983 | } | |
984 | ||
baa4d64b NB |
985 | int iscsi_target_setup_login_socket( |
986 | struct iscsi_np *np, | |
13a3cf08 | 987 | struct sockaddr_storage *sockaddr) |
baa4d64b NB |
988 | { |
989 | struct iscsit_transport *t; | |
990 | int rc; | |
991 | ||
992 | t = iscsit_get_transport(np->np_network_transport); | |
993 | if (!t) | |
994 | return -EINVAL; | |
995 | ||
996 | rc = t->iscsit_setup_np(np, sockaddr); | |
997 | if (rc < 0) { | |
998 | iscsit_put_transport(t); | |
999 | return rc; | |
1000 | } | |
1001 | ||
1002 | np->np_transport = t; | |
14f4b54f | 1003 | np->enabled = true; |
baa4d64b NB |
1004 | return 0; |
1005 | } | |
1006 | ||
1007 | int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) | |
1008 | { | |
1009 | struct socket *new_sock, *sock = np->np_socket; | |
1010 | struct sockaddr_in sock_in; | |
1011 | struct sockaddr_in6 sock_in6; | |
1012 | int rc, err; | |
1013 | ||
1014 | rc = kernel_accept(sock, &new_sock, 0); | |
1015 | if (rc < 0) | |
1016 | return rc; | |
1017 | ||
1018 | conn->sock = new_sock; | |
1019 | conn->login_family = np->np_sockaddr.ss_family; | |
baa4d64b NB |
1020 | |
1021 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
1022 | memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); | |
1023 | ||
1024 | rc = conn->sock->ops->getname(conn->sock, | |
1025 | (struct sockaddr *)&sock_in6, &err, 1); | |
1026 | if (!rc) { | |
dc58f760 AG |
1027 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1028 | memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1029 | } else { | |
1030 | /* Pretend to be an ipv4 socket */ | |
1031 | sock_in.sin_family = AF_INET; | |
1032 | sock_in.sin_port = sock_in6.sin6_port; | |
1033 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1034 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
1035 | } | |
baa4d64b NB |
1036 | } |
1037 | ||
1038 | rc = conn->sock->ops->getname(conn->sock, | |
1039 | (struct sockaddr *)&sock_in6, &err, 0); | |
1040 | if (!rc) { | |
69d75574 AG |
1041 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
1042 | memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); | |
1043 | } else { | |
1044 | /* Pretend to be an ipv4 socket */ | |
1045 | sock_in.sin_family = AF_INET; | |
1046 | sock_in.sin_port = sock_in6.sin6_port; | |
1047 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); | |
1048 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
1049 | } | |
baa4d64b NB |
1050 | } |
1051 | } else { | |
1052 | memset(&sock_in, 0, sizeof(struct sockaddr_in)); | |
1053 | ||
1054 | rc = conn->sock->ops->getname(conn->sock, | |
1055 | (struct sockaddr *)&sock_in, &err, 1); | |
dc58f760 AG |
1056 | if (!rc) |
1057 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1058 | |
1059 | rc = conn->sock->ops->getname(conn->sock, | |
1060 | (struct sockaddr *)&sock_in, &err, 0); | |
69d75574 AG |
1061 | if (!rc) |
1062 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); | |
baa4d64b NB |
1063 | } |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) | |
1069 | { | |
1070 | struct iscsi_login_req *login_req; | |
1071 | u32 padding = 0, payload_length; | |
1072 | ||
1073 | if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) | |
1074 | return -1; | |
1075 | ||
1076 | login_req = (struct iscsi_login_req *)login->req; | |
1077 | payload_length = ntoh24(login_req->dlength); | |
1078 | padding = ((-payload_length) & 3); | |
1079 | ||
1080 | pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," | |
1081 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", | |
1082 | login_req->flags, login_req->itt, login_req->cmdsn, | |
1083 | login_req->exp_statsn, login_req->cid, payload_length); | |
1084 | /* | |
1085 | * Setup the initial iscsi_login values from the leading | |
1086 | * login request PDU. | |
1087 | */ | |
1088 | if (login->first_request) { | |
1089 | login_req = (struct iscsi_login_req *)login->req; | |
1090 | login->leading_connection = (!login_req->tsih) ? 1 : 0; | |
3e1c81a9 | 1091 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
baa4d64b NB |
1092 | login->version_min = login_req->min_version; |
1093 | login->version_max = login_req->max_version; | |
1094 | memcpy(login->isid, login_req->isid, 6); | |
1095 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); | |
1096 | login->init_task_tag = login_req->itt; | |
1097 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); | |
1098 | login->cid = be16_to_cpu(login_req->cid); | |
1099 | login->tsih = be16_to_cpu(login_req->tsih); | |
1100 | } | |
1101 | ||
1102 | if (iscsi_target_check_login_request(conn, login) < 0) | |
1103 | return -1; | |
1104 | ||
1105 | memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); | |
1106 | if (iscsi_login_rx_data(conn, login->req_buf, | |
1107 | payload_length + padding) < 0) | |
1108 | return -1; | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, | |
1114 | u32 length) | |
1115 | { | |
1116 | if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) | |
1117 | return -1; | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static int | |
1123 | iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) | |
1124 | { | |
1125 | int rc; | |
1126 | ||
1127 | if (!t->owner) { | |
1128 | conn->conn_transport = t; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | rc = try_module_get(t->owner); | |
1133 | if (!rc) { | |
1134 | pr_err("try_module_get() failed for %s\n", t->name); | |
1135 | return -EINVAL; | |
1136 | } | |
1137 | ||
1138 | conn->conn_transport = t; | |
1139 | return 0; | |
1140 | } | |
1141 | ||
a91eb7d9 NB |
1142 | void iscsi_target_login_sess_out(struct iscsi_conn *conn, |
1143 | struct iscsi_np *np, bool zero_tsih, bool new_sess) | |
1144 | { | |
0bcc297e | 1145 | if (!new_sess) |
a91eb7d9 NB |
1146 | goto old_sess_out; |
1147 | ||
1148 | pr_err("iSCSI Login negotiation failed.\n"); | |
1149 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, | |
1150 | ISCSI_LOGIN_STATUS_INIT_ERR); | |
1151 | if (!zero_tsih || !conn->sess) | |
1152 | goto old_sess_out; | |
1153 | if (conn->sess->se_sess) | |
1154 | transport_free_session(conn->sess->se_sess); | |
1155 | if (conn->sess->session_index != 0) { | |
1156 | spin_lock_bh(&sess_idr_lock); | |
1157 | idr_remove(&sess_idr, conn->sess->session_index); | |
1158 | spin_unlock_bh(&sess_idr_lock); | |
1159 | } | |
1160 | kfree(conn->sess->sess_ops); | |
1161 | kfree(conn->sess); | |
a0b3b9b2 | 1162 | conn->sess = NULL; |
a91eb7d9 NB |
1163 | |
1164 | old_sess_out: | |
1165 | iscsi_stop_login_thread_timer(np); | |
1166 | /* | |
1167 | * If login negotiation fails check if the Time2Retain timer | |
1168 | * needs to be restarted. | |
1169 | */ | |
1170 | if (!zero_tsih && conn->sess) { | |
1171 | spin_lock_bh(&conn->sess->conn_lock); | |
1172 | if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { | |
1173 | struct se_portal_group *se_tpg = | |
60bfcf8e | 1174 | &conn->tpg->tpg_se_tpg; |
a91eb7d9 NB |
1175 | |
1176 | atomic_set(&conn->sess->session_continuation, 0); | |
1177 | spin_unlock_bh(&conn->sess->conn_lock); | |
1178 | spin_lock_bh(&se_tpg->session_lock); | |
1179 | iscsit_start_time2retain_handler(conn->sess); | |
1180 | spin_unlock_bh(&se_tpg->session_lock); | |
1181 | } else | |
1182 | spin_unlock_bh(&conn->sess->conn_lock); | |
1183 | iscsit_dec_session_usage_count(conn->sess); | |
1184 | } | |
1185 | ||
69110e3c HX |
1186 | ahash_request_free(conn->conn_tx_hash); |
1187 | if (conn->conn_rx_hash) { | |
1188 | struct crypto_ahash *tfm; | |
1189 | ||
1190 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
1191 | ahash_request_free(conn->conn_rx_hash); | |
1192 | crypto_free_ahash(tfm); | |
1193 | } | |
a91eb7d9 | 1194 | |
fbecb659 | 1195 | free_cpumask_var(conn->conn_cpumask); |
a91eb7d9 NB |
1196 | |
1197 | kfree(conn->conn_ops); | |
1198 | ||
1199 | if (conn->param_list) { | |
1200 | iscsi_release_param_list(conn->param_list); | |
1201 | conn->param_list = NULL; | |
1202 | } | |
1203 | iscsi_target_nego_release(conn); | |
1204 | ||
1205 | if (conn->sock) { | |
1206 | sock_release(conn->sock); | |
1207 | conn->sock = NULL; | |
1208 | } | |
1209 | ||
954f2372 SG |
1210 | if (conn->conn_transport->iscsit_wait_conn) |
1211 | conn->conn_transport->iscsit_wait_conn(conn); | |
1212 | ||
a91eb7d9 NB |
1213 | if (conn->conn_transport->iscsit_free_conn) |
1214 | conn->conn_transport->iscsit_free_conn(conn); | |
1215 | ||
1216 | iscsit_put_transport(conn->conn_transport); | |
1217 | kfree(conn); | |
1218 | } | |
1219 | ||
e48354ce NB |
1220 | static int __iscsi_target_login_thread(struct iscsi_np *np) |
1221 | { | |
baa4d64b | 1222 | u8 *buffer, zero_tsih = 0; |
81a9c5e7 | 1223 | int ret = 0, rc; |
e48354ce NB |
1224 | struct iscsi_conn *conn = NULL; |
1225 | struct iscsi_login *login; | |
1226 | struct iscsi_portal_group *tpg = NULL; | |
e48354ce | 1227 | struct iscsi_login_req *pdu; |
a91eb7d9 NB |
1228 | struct iscsi_tpg_np *tpg_np; |
1229 | bool new_sess = false; | |
e48354ce NB |
1230 | |
1231 | flush_signals(current); | |
e48354ce NB |
1232 | |
1233 | spin_lock_bh(&np->np_thread_lock); | |
1234 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1235 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1236 | complete(&np->np_restart_comp); | |
81a9c5e7 MP |
1237 | } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { |
1238 | spin_unlock_bh(&np->np_thread_lock); | |
1239 | goto exit; | |
e48354ce NB |
1240 | } else { |
1241 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; | |
1242 | } | |
1243 | spin_unlock_bh(&np->np_thread_lock); | |
1244 | ||
e48354ce NB |
1245 | conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
1246 | if (!conn) { | |
1247 | pr_err("Could not allocate memory for" | |
1248 | " new connection\n"); | |
e48354ce NB |
1249 | /* Get another socket */ |
1250 | return 1; | |
1251 | } | |
e48354ce NB |
1252 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
1253 | conn->conn_state = TARG_CONN_STATE_FREE; | |
e48354ce | 1254 | |
baa4d64b NB |
1255 | if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
1256 | kfree(conn); | |
1257 | return 1; | |
1258 | } | |
e48354ce | 1259 | |
baa4d64b NB |
1260 | rc = np->np_transport->iscsit_accept_np(np, conn); |
1261 | if (rc == -ENOSYS) { | |
1262 | complete(&np->np_restart_comp); | |
1263 | iscsit_put_transport(conn->conn_transport); | |
1264 | kfree(conn); | |
1265 | conn = NULL; | |
1266 | goto exit; | |
1267 | } else if (rc < 0) { | |
1268 | spin_lock_bh(&np->np_thread_lock); | |
1269 | if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { | |
1270 | spin_unlock_bh(&np->np_thread_lock); | |
1271 | complete(&np->np_restart_comp); | |
c9a03c12 NB |
1272 | iscsit_put_transport(conn->conn_transport); |
1273 | kfree(conn); | |
1274 | conn = NULL; | |
baa4d64b NB |
1275 | /* Get another socket */ |
1276 | return 1; | |
1277 | } | |
1278 | spin_unlock_bh(&np->np_thread_lock); | |
1279 | iscsit_put_transport(conn->conn_transport); | |
1280 | kfree(conn); | |
1281 | conn = NULL; | |
1282 | goto out; | |
e48354ce NB |
1283 | } |
1284 | /* | |
1285 | * Perform the remaining iSCSI connection initialization items.. | |
1286 | */ | |
baa4d64b NB |
1287 | login = iscsi_login_init_conn(conn); |
1288 | if (!login) { | |
e48354ce NB |
1289 | goto new_sess_out; |
1290 | } | |
1291 | ||
baa4d64b | 1292 | iscsi_start_login_thread_timer(np); |
e48354ce | 1293 | |
baa4d64b NB |
1294 | pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
1295 | conn->conn_state = TARG_CONN_STATE_XPT_UP; | |
1296 | /* | |
1297 | * This will process the first login request + payload.. | |
1298 | */ | |
1299 | rc = np->np_transport->iscsit_get_login_rx(conn, login); | |
1300 | if (rc == 1) | |
1301 | return 1; | |
1302 | else if (rc < 0) | |
1303 | goto new_sess_out; | |
66c7db68 | 1304 | |
baa4d64b NB |
1305 | buffer = &login->req[0]; |
1306 | pdu = (struct iscsi_login_req *)buffer; | |
e48354ce NB |
1307 | /* |
1308 | * Used by iscsit_tx_login_rsp() for Login Resonses PDUs | |
1309 | * when Status-Class != 0. | |
1310 | */ | |
baa4d64b | 1311 | conn->login_itt = pdu->itt; |
e48354ce NB |
1312 | |
1313 | spin_lock_bh(&np->np_thread_lock); | |
1314 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
1315 | spin_unlock_bh(&np->np_thread_lock); | |
69d75574 AG |
1316 | pr_err("iSCSI Network Portal on %pISpc currently not" |
1317 | " active.\n", &np->np_sockaddr); | |
e48354ce NB |
1318 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
1319 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); | |
1320 | goto new_sess_out; | |
1321 | } | |
1322 | spin_unlock_bh(&np->np_thread_lock); | |
1323 | ||
e48354ce NB |
1324 | conn->network_transport = np->np_network_transport; |
1325 | ||
dc58f760 AG |
1326 | pr_debug("Received iSCSI login request from %pISpc on %s Network" |
1327 | " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, | |
69d75574 | 1328 | &conn->local_sockaddr); |
e48354ce NB |
1329 | |
1330 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); | |
1331 | conn->conn_state = TARG_CONN_STATE_IN_LOGIN; | |
1332 | ||
1333 | if (iscsi_login_check_initiator_version(conn, pdu->max_version, | |
1334 | pdu->min_version) < 0) | |
1335 | goto new_sess_out; | |
1336 | ||
1337 | zero_tsih = (pdu->tsih == 0x0000); | |
ee1b1b9c | 1338 | if (zero_tsih) { |
e48354ce NB |
1339 | /* |
1340 | * This is the leading connection of a new session. | |
1341 | * We wait until after authentication to check for | |
1342 | * session reinstatement. | |
1343 | */ | |
1344 | if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) | |
1345 | goto new_sess_out; | |
1346 | } else { | |
1347 | /* | |
1348 | * Add a new connection to an existing session. | |
1349 | * We check for a non-existant session in | |
1350 | * iscsi_login_non_zero_tsih_s2() below based | |
1351 | * on ISID/TSIH, but wait until after authentication | |
1352 | * to check for connection reinstatement, etc. | |
1353 | */ | |
1354 | if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) | |
1355 | goto new_sess_out; | |
1356 | } | |
e48354ce | 1357 | /* |
baa4d64b NB |
1358 | * SessionType: Discovery |
1359 | * | |
1360 | * Locates Default Portal | |
1361 | * | |
1362 | * SessionType: Normal | |
1363 | * | |
1364 | * Locates Target Portal from NP -> Target IQN | |
e48354ce | 1365 | */ |
baa4d64b NB |
1366 | rc = iscsi_target_locate_portal(np, conn, login); |
1367 | if (rc < 0) { | |
e48354ce NB |
1368 | tpg = conn->tpg; |
1369 | goto new_sess_out; | |
1370 | } | |
a91eb7d9 | 1371 | login->zero_tsih = zero_tsih; |
e48354ce | 1372 | |
23a548ee SG |
1373 | conn->sess->se_sess->sup_prot_ops = |
1374 | conn->conn_transport->iscsit_get_sup_prot_ops(conn); | |
1375 | ||
e48354ce NB |
1376 | tpg = conn->tpg; |
1377 | if (!tpg) { | |
1378 | pr_err("Unable to locate struct iscsi_conn->tpg\n"); | |
1379 | goto new_sess_out; | |
1380 | } | |
1381 | ||
1382 | if (zero_tsih) { | |
baa4d64b | 1383 | if (iscsi_login_zero_tsih_s2(conn) < 0) |
e48354ce | 1384 | goto new_sess_out; |
e48354ce | 1385 | } else { |
baa4d64b | 1386 | if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
e48354ce | 1387 | goto old_sess_out; |
e48354ce NB |
1388 | } |
1389 | ||
a91eb7d9 NB |
1390 | ret = iscsi_target_start_negotiation(login, conn); |
1391 | if (ret < 0) | |
e48354ce NB |
1392 | goto new_sess_out; |
1393 | ||
e48354ce NB |
1394 | iscsi_stop_login_thread_timer(np); |
1395 | ||
a91eb7d9 NB |
1396 | if (ret == 1) { |
1397 | tpg_np = conn->tpg_np; | |
e48354ce | 1398 | |
e5419865 | 1399 | iscsi_post_login_handler(np, conn, zero_tsih); |
a91eb7d9 NB |
1400 | iscsit_deaccess_np(np, tpg, tpg_np); |
1401 | } | |
e48354ce | 1402 | |
e48354ce | 1403 | tpg = NULL; |
a91eb7d9 | 1404 | tpg_np = NULL; |
e48354ce NB |
1405 | /* Get another socket */ |
1406 | return 1; | |
1407 | ||
1408 | new_sess_out: | |
a91eb7d9 | 1409 | new_sess = true; |
e48354ce | 1410 | old_sess_out: |
a91eb7d9 NB |
1411 | tpg_np = conn->tpg_np; |
1412 | iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); | |
1413 | new_sess = false; | |
e48354ce NB |
1414 | |
1415 | if (tpg) { | |
a91eb7d9 | 1416 | iscsit_deaccess_np(np, tpg, tpg_np); |
e48354ce | 1417 | tpg = NULL; |
a91eb7d9 | 1418 | tpg_np = NULL; |
e48354ce NB |
1419 | } |
1420 | ||
1421 | out: | |
81a9c5e7 MP |
1422 | return 1; |
1423 | ||
baa4d64b | 1424 | exit: |
e48354ce NB |
1425 | iscsi_stop_login_thread_timer(np); |
1426 | spin_lock_bh(&np->np_thread_lock); | |
1427 | np->np_thread_state = ISCSI_NP_THREAD_EXIT; | |
1428 | spin_unlock_bh(&np->np_thread_lock); | |
baa4d64b | 1429 | |
e48354ce NB |
1430 | return 0; |
1431 | } | |
1432 | ||
1433 | int iscsi_target_login_thread(void *arg) | |
1434 | { | |
8359cf43 | 1435 | struct iscsi_np *np = arg; |
e48354ce NB |
1436 | int ret; |
1437 | ||
1438 | allow_signal(SIGINT); | |
1439 | ||
81a9c5e7 | 1440 | while (1) { |
e48354ce NB |
1441 | ret = __iscsi_target_login_thread(np); |
1442 | /* | |
1443 | * We break and exit here unless another sock_accept() call | |
1444 | * is expected. | |
1445 | */ | |
1446 | if (ret != 1) | |
1447 | break; | |
1448 | } | |
1449 | ||
1450 | return 0; | |
1451 | } |