Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * This file contains the login functions used by the iSCSI Target driver. |
| 3 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 19 | #include <crypto/hash.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 20 | #include <linux/string.h> |
| 21 | #include <linux/kthread.h> |
Al Viro | 4040153 | 2012-02-13 03:58:52 +0000 | [diff] [blame] | 22 | #include <linux/idr.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 23 | #include <scsi/iscsi_proto.h> |
| 24 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 25 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 26 | |
Sagi Grimberg | 67f091f | 2015-01-07 14:57:31 +0200 | [diff] [blame] | 27 | #include <target/iscsi/iscsi_target_core.h> |
| 28 | #include <target/iscsi/iscsi_target_stat.h> |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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" |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 34 | #include "iscsi_target_tpg.h" |
| 35 | #include "iscsi_target_util.h" |
| 36 | #include "iscsi_target.h" |
| 37 | #include "iscsi_target_parameters.h" |
| 38 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 39 | #include <target/iscsi/iscsi_transport.h> |
| 40 | |
| 41 | static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 42 | { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 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 | } |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 50 | conn->login = login; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 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 | |
Roland Dreier | d5627ac | 2012-10-31 09:16:46 -0700 | [diff] [blame] | 73 | init_waitqueue_head(&conn->queues_wq); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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); |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 85 | init_completion(&conn->rx_login_comp); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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"); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 95 | goto out_conn_ops; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 96 | } |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 97 | conn->conn_login = login; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 98 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 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; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | { |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 118 | struct crypto_ahash *tfm; |
| 119 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | */ |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 125 | tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); |
| 126 | if (IS_ERR(tfm)) { |
| 127 | pr_err("crypto_alloc_ahash() failed\n"); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 128 | return -ENOMEM; |
| 129 | } |
| 130 | |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 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); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 135 | return -ENOMEM; |
| 136 | } |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 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); |
| 145 | return -ENOMEM; |
| 146 | } |
| 147 | ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 180 | sessiontype_param = iscsi_find_param_from_key( |
| 181 | SESSIONTYPE, conn->param_list); |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 182 | if (!initiatorname_param || !sessiontype_param) { |
| 183 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 184 | ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 185 | return -1; |
Roland Dreier | 1c5c12c | 2012-11-05 18:02:42 -0800 | [diff] [blame] | 186 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 194 | sess_p = se_sess->fabric_sess_ptr; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 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 | } |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 202 | if (!memcmp(sess_p->isid, conn->sess->isid, 6) && |
| 203 | (!strcmp(sess_p->sess_ops->InitiatorName, |
| 204 | initiatorname_param->value) && |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 205 | (sess_p->sess_ops->SessionType == sessiontype))) { |
| 206 | atomic_set(&sess_p->session_reinstatement, 1); |
Nicholas Bellinger | bb1f06f | 2017-04-25 10:55:12 -0700 | [diff] [blame] | 207 | atomic_set(&sess_p->session_fall_back_to_erl0, 1); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 208 | spin_unlock(&sess_p->conn_lock); |
| 209 | iscsit_inc_session_usage_count(sess_p); |
| 210 | iscsit_stop_time2retain_timer(sess_p); |
| 211 | sess = sess_p; |
| 212 | break; |
| 213 | } |
| 214 | spin_unlock(&sess_p->conn_lock); |
| 215 | } |
| 216 | spin_unlock_bh(&se_tpg->session_lock); |
| 217 | /* |
| 218 | * If the Time2Retain handler has expired, the session is already gone. |
| 219 | */ |
| 220 | if (!sess) |
| 221 | return 0; |
| 222 | |
| 223 | pr_debug("%s iSCSI Session SID %u is still active for %s," |
| 224 | " preforming session reinstatement.\n", (sessiontype) ? |
| 225 | "Discovery" : "Normal", sess->sid, |
| 226 | sess->sess_ops->InitiatorName); |
| 227 | |
| 228 | spin_lock_bh(&sess->conn_lock); |
| 229 | if (sess->session_state == TARG_SESS_STATE_FAILED) { |
| 230 | spin_unlock_bh(&sess->conn_lock); |
| 231 | iscsit_dec_session_usage_count(sess); |
Christoph Hellwig | 44f33d0 | 2016-05-02 15:45:24 +0200 | [diff] [blame] | 232 | iscsit_close_session(sess); |
Nicholas Bellinger | 99367f0 | 2012-02-27 01:43:32 -0800 | [diff] [blame] | 233 | return 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 234 | } |
| 235 | spin_unlock_bh(&sess->conn_lock); |
| 236 | |
| 237 | iscsit_stop_session(sess, 1, 1); |
| 238 | iscsit_dec_session_usage_count(sess); |
| 239 | |
Christoph Hellwig | 44f33d0 | 2016-05-02 15:45:24 +0200 | [diff] [blame] | 240 | iscsit_close_session(sess); |
Nicholas Bellinger | 99367f0 | 2012-02-27 01:43:32 -0800 | [diff] [blame] | 241 | return 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static void iscsi_login_set_conn_values( |
| 245 | struct iscsi_session *sess, |
| 246 | struct iscsi_conn *conn, |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 247 | __be16 cid) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 248 | { |
| 249 | conn->sess = sess; |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 250 | conn->cid = be16_to_cpu(cid); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 251 | /* |
| 252 | * Generate a random Status sequence number (statsn) for the new |
| 253 | * iSCSI connection. |
| 254 | */ |
| 255 | get_random_bytes(&conn->stat_sn, sizeof(u32)); |
| 256 | |
| 257 | mutex_lock(&auth_id_lock); |
| 258 | conn->auth_id = iscsit_global->auth_id++; |
| 259 | mutex_unlock(&auth_id_lock); |
| 260 | } |
| 261 | |
Varun Prakash | d2faaef | 2016-04-20 00:00:19 +0530 | [diff] [blame] | 262 | __printf(2, 3) int iscsi_change_param_sprintf( |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 263 | struct iscsi_conn *conn, |
| 264 | const char *fmt, ...) |
| 265 | { |
| 266 | va_list args; |
| 267 | unsigned char buf[64]; |
| 268 | |
| 269 | memset(buf, 0, sizeof buf); |
| 270 | |
| 271 | va_start(args, fmt); |
| 272 | vsnprintf(buf, sizeof buf, fmt, args); |
| 273 | va_end(args); |
| 274 | |
| 275 | if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| 276 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 277 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 278 | return -1; |
| 279 | } |
| 280 | |
| 281 | return 0; |
| 282 | } |
Varun Prakash | d2faaef | 2016-04-20 00:00:19 +0530 | [diff] [blame] | 283 | EXPORT_SYMBOL(iscsi_change_param_sprintf); |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 284 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 285 | /* |
| 286 | * This is the leading connection of a new session, |
| 287 | * or session reinstatement. |
| 288 | */ |
| 289 | static int iscsi_login_zero_tsih_s1( |
| 290 | struct iscsi_conn *conn, |
| 291 | unsigned char *buf) |
| 292 | { |
| 293 | struct iscsi_session *sess = NULL; |
| 294 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
Benjamin Wang | 13b5533 | 2012-08-26 18:04:10 +0800 | [diff] [blame] | 295 | int ret; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 296 | |
| 297 | sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); |
| 298 | if (!sess) { |
| 299 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 300 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 301 | pr_err("Could not allocate memory for session\n"); |
Nicholas Bellinger | 0957627 | 2011-11-04 11:36:38 -0700 | [diff] [blame] | 302 | return -ENOMEM; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | iscsi_login_set_conn_values(sess, conn, pdu->cid); |
| 306 | sess->init_task_tag = pdu->itt; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 307 | memcpy(&sess->isid, pdu->isid, 6); |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 308 | sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 309 | INIT_LIST_HEAD(&sess->sess_conn_list); |
| 310 | INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); |
| 311 | INIT_LIST_HEAD(&sess->cr_active_list); |
| 312 | INIT_LIST_HEAD(&sess->cr_inactive_list); |
| 313 | init_completion(&sess->async_msg_comp); |
| 314 | init_completion(&sess->reinstatement_comp); |
| 315 | init_completion(&sess->session_wait_comp); |
| 316 | init_completion(&sess->session_waiting_on_uc_comp); |
| 317 | mutex_init(&sess->cmdsn_mutex); |
| 318 | spin_lock_init(&sess->conn_lock); |
| 319 | spin_lock_init(&sess->cr_a_lock); |
| 320 | spin_lock_init(&sess->cr_i_lock); |
| 321 | spin_lock_init(&sess->session_usage_lock); |
| 322 | spin_lock_init(&sess->ttt_lock); |
| 323 | |
Tejun Heo | c9365bd | 2013-02-27 17:04:43 -0800 | [diff] [blame] | 324 | idr_preload(GFP_KERNEL); |
Roland Dreier | 998866b | 2012-11-05 18:02:40 -0800 | [diff] [blame] | 325 | spin_lock_bh(&sess_idr_lock); |
Tejun Heo | c9365bd | 2013-02-27 17:04:43 -0800 | [diff] [blame] | 326 | ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
| 327 | if (ret >= 0) |
| 328 | sess->session_index = ret; |
Roland Dreier | 998866b | 2012-11-05 18:02:40 -0800 | [diff] [blame] | 329 | spin_unlock_bh(&sess_idr_lock); |
Tejun Heo | c9365bd | 2013-02-27 17:04:43 -0800 | [diff] [blame] | 330 | idr_preload_end(); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 331 | |
Benjamin Wang | 13b5533 | 2012-08-26 18:04:10 +0800 | [diff] [blame] | 332 | if (ret < 0) { |
Tejun Heo | c9365bd | 2013-02-27 17:04:43 -0800 | [diff] [blame] | 333 | pr_err("idr_alloc() for sess_idr failed\n"); |
Benjamin Wang | 13b5533 | 2012-08-26 18:04:10 +0800 | [diff] [blame] | 334 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 335 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 336 | kfree(sess); |
| 337 | return -ENOMEM; |
| 338 | } |
| 339 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 340 | sess->creation_time = get_jiffies_64(); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 341 | /* |
| 342 | * The FFP CmdSN window values will be allocated from the TPG's |
| 343 | * Initiator Node's ACL once the login has been successfully completed. |
| 344 | */ |
Roland Dreier | 109e238 | 2015-07-23 14:53:32 -0700 | [diff] [blame] | 345 | atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 346 | |
| 347 | sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); |
| 348 | if (!sess->sess_ops) { |
| 349 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 350 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 351 | pr_err("Unable to allocate memory for" |
| 352 | " struct iscsi_sess_ops.\n"); |
Nicholas Bellinger | 0957627 | 2011-11-04 11:36:38 -0700 | [diff] [blame] | 353 | kfree(sess); |
| 354 | return -ENOMEM; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 355 | } |
| 356 | |
Sagi Grimberg | 23a548e | 2014-12-02 16:57:35 +0200 | [diff] [blame] | 357 | sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); |
Nicholas Bellinger | 0957627 | 2011-11-04 11:36:38 -0700 | [diff] [blame] | 358 | if (IS_ERR(sess->se_sess)) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 359 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 360 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
Evgenii Lepikhin | a928d28 | 2015-04-21 15:49:57 +0300 | [diff] [blame] | 361 | kfree(sess->sess_ops); |
Nicholas Bellinger | 0957627 | 2011-11-04 11:36:38 -0700 | [diff] [blame] | 362 | kfree(sess); |
| 363 | return -ENOMEM; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static int iscsi_login_zero_tsih_s2( |
| 370 | struct iscsi_conn *conn) |
| 371 | { |
| 372 | struct iscsi_node_attrib *na; |
| 373 | struct iscsi_session *sess = conn->sess; |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 374 | bool iser = false; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 375 | |
| 376 | sess->tpg = conn->tpg; |
| 377 | |
| 378 | /* |
| 379 | * Assign a new TPG Session Handle. Note this is protected with |
| 380 | * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). |
| 381 | */ |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 382 | sess->tsih = ++sess->tpg->ntsih; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 383 | if (!sess->tsih) |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 384 | sess->tsih = ++sess->tpg->ntsih; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 385 | |
| 386 | /* |
| 387 | * Create the default params from user defined values.. |
| 388 | */ |
| 389 | if (iscsi_copy_param_list(&conn->param_list, |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 390 | conn->tpg->param_list, 1) < 0) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 391 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 392 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 393 | return -1; |
| 394 | } |
| 395 | |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 396 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| 397 | iser = true; |
| 398 | |
| 399 | iscsi_set_keys_to_negotiate(conn->param_list, iser); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 400 | |
| 401 | if (sess->sess_ops->SessionType) |
| 402 | return iscsi_set_keys_irrelevant_for_discovery( |
| 403 | conn->param_list); |
| 404 | |
| 405 | na = iscsit_tpg_get_node_attrib(sess); |
| 406 | |
| 407 | /* |
| 408 | * Need to send TargetPortalGroupTag back in first login response |
| 409 | * on any iSCSI connection where the Initiator provides TargetName. |
| 410 | * See 5.3.1. Login Phase Start |
| 411 | * |
| 412 | * In our case, we have already located the struct iscsi_tiqn at this point. |
| 413 | */ |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 414 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 415 | return -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 416 | |
| 417 | /* |
| 418 | * Workaround for Initiators that have broken connection recovery logic. |
| 419 | * |
| 420 | * "We would really like to get rid of this." Linux-iSCSI.org team |
| 421 | */ |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 422 | if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 423 | return -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 424 | |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 425 | /* |
| 426 | * Set RDMAExtensions=Yes by default for iSER enabled network portals |
| 427 | */ |
| 428 | if (iser) { |
| 429 | struct iscsi_param *param; |
| 430 | unsigned long mrdsl, off; |
| 431 | int rc; |
| 432 | |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 433 | if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 434 | return -1; |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 435 | |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 436 | /* |
| 437 | * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for |
Colin Ian King | 3fc6a64 | 2016-09-02 15:30:34 +0100 | [diff] [blame] | 438 | * Immediate Data + Unsolicited Data-OUT if necessary.. |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 439 | */ |
| 440 | param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", |
| 441 | conn->param_list); |
| 442 | if (!param) { |
| 443 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 444 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 445 | return -1; |
| 446 | } |
Jingoo Han | 57103d7 | 2013-07-19 16:22:19 +0900 | [diff] [blame] | 447 | rc = kstrtoul(param->value, 0, &mrdsl); |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 448 | if (rc < 0) { |
| 449 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 450 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 451 | return -1; |
| 452 | } |
| 453 | off = mrdsl % PAGE_SIZE; |
| 454 | if (!off) |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 455 | goto check_prot; |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 456 | |
| 457 | if (mrdsl < PAGE_SIZE) |
| 458 | mrdsl = PAGE_SIZE; |
| 459 | else |
| 460 | mrdsl -= off; |
| 461 | |
| 462 | pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" |
| 463 | " to PAGE_SIZE\n", mrdsl); |
| 464 | |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 465 | if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 466 | return -1; |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 467 | /* |
| 468 | * ISER currently requires that ImmediateData + Unsolicited |
| 469 | * Data be disabled when protection / signature MRs are enabled. |
| 470 | */ |
| 471 | check_prot: |
| 472 | if (sess->se_sess->sup_prot_ops & |
| 473 | (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | |
| 474 | TARGET_PROT_DOUT_INSERT)) { |
| 475 | |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 476 | if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 477 | return -1; |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 478 | |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 479 | if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 480 | return -1; |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 481 | |
Nicholas Bellinger | 52d0aa7 | 2014-05-14 20:54:26 +0000 | [diff] [blame] | 482 | pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" |
| 483 | " T10-PI enabled ISER session\n"); |
| 484 | } |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 485 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 486 | |
| 487 | return 0; |
| 488 | } |
| 489 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 490 | static int iscsi_login_non_zero_tsih_s1( |
| 491 | struct iscsi_conn *conn, |
| 492 | unsigned char *buf) |
| 493 | { |
| 494 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
| 495 | |
| 496 | iscsi_login_set_conn_values(NULL, conn, pdu->cid); |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | /* |
| 501 | * Add a new connection to an existing session. |
| 502 | */ |
| 503 | static int iscsi_login_non_zero_tsih_s2( |
| 504 | struct iscsi_conn *conn, |
| 505 | unsigned char *buf) |
| 506 | { |
| 507 | struct iscsi_portal_group *tpg = conn->tpg; |
| 508 | struct iscsi_session *sess = NULL, *sess_p = NULL; |
| 509 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
| 510 | struct se_session *se_sess, *se_sess_tmp; |
| 511 | struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 512 | bool iser = false; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 513 | |
| 514 | spin_lock_bh(&se_tpg->session_lock); |
| 515 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, |
| 516 | sess_list) { |
| 517 | |
| 518 | sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; |
| 519 | if (atomic_read(&sess_p->session_fall_back_to_erl0) || |
| 520 | atomic_read(&sess_p->session_logout) || |
| 521 | (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) |
| 522 | continue; |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 523 | if (!memcmp(sess_p->isid, pdu->isid, 6) && |
Christoph Hellwig | 50e5c87 | 2012-09-26 08:00:40 -0400 | [diff] [blame] | 524 | (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 525 | iscsit_inc_session_usage_count(sess_p); |
| 526 | iscsit_stop_time2retain_timer(sess_p); |
| 527 | sess = sess_p; |
| 528 | break; |
| 529 | } |
| 530 | } |
| 531 | spin_unlock_bh(&se_tpg->session_lock); |
| 532 | |
| 533 | /* |
| 534 | * If the Time2Retain handler has expired, the session is already gone. |
| 535 | */ |
| 536 | if (!sess) { |
| 537 | pr_err("Initiator attempting to add a connection to" |
| 538 | " a non-existent session, rejecting iSCSI Login.\n"); |
| 539 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 540 | ISCSI_LOGIN_STATUS_NO_SESSION); |
| 541 | return -1; |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Stop the Time2Retain timer if this is a failed session, we restart |
| 546 | * the timer if the login is not successful. |
| 547 | */ |
| 548 | spin_lock_bh(&sess->conn_lock); |
| 549 | if (sess->session_state == TARG_SESS_STATE_FAILED) |
| 550 | atomic_set(&sess->session_continuation, 1); |
| 551 | spin_unlock_bh(&sess->conn_lock); |
| 552 | |
| 553 | iscsi_login_set_conn_values(sess, conn, pdu->cid); |
| 554 | |
| 555 | if (iscsi_copy_param_list(&conn->param_list, |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 556 | conn->tpg->param_list, 0) < 0) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 557 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 558 | ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| 559 | return -1; |
| 560 | } |
| 561 | |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 562 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| 563 | iser = true; |
| 564 | |
| 565 | iscsi_set_keys_to_negotiate(conn->param_list, iser); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 566 | /* |
| 567 | * Need to send TargetPortalGroupTag back in first login response |
| 568 | * on any iSCSI connection where the Initiator provides TargetName. |
| 569 | * See 5.3.1. Login Phase Start |
| 570 | * |
| 571 | * In our case, we have already located the struct iscsi_tiqn at this point. |
| 572 | */ |
Roland Dreier | 79d59d0 | 2014-05-29 13:32:30 -0700 | [diff] [blame] | 573 | if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 574 | return -1; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 575 | |
Christophe Vu-Brugier | c04a609 | 2015-04-19 22:18:33 +0200 | [diff] [blame] | 576 | return 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | int iscsi_login_post_auth_non_zero_tsih( |
| 580 | struct iscsi_conn *conn, |
| 581 | u16 cid, |
| 582 | u32 exp_statsn) |
| 583 | { |
| 584 | struct iscsi_conn *conn_ptr = NULL; |
| 585 | struct iscsi_conn_recovery *cr = NULL; |
| 586 | struct iscsi_session *sess = conn->sess; |
| 587 | |
| 588 | /* |
| 589 | * By following item 5 in the login table, if we have found |
| 590 | * an existing ISID and a valid/existing TSIH and an existing |
| 591 | * CID we do connection reinstatement. Currently we dont not |
| 592 | * support it so we send back an non-zero status class to the |
| 593 | * initiator and release the new connection. |
| 594 | */ |
| 595 | conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 596 | if (conn_ptr) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 597 | pr_err("Connection exists with CID %hu for %s," |
| 598 | " performing connection reinstatement.\n", |
| 599 | conn_ptr->cid, sess->sess_ops->InitiatorName); |
| 600 | |
| 601 | iscsit_connection_reinstatement_rcfr(conn_ptr); |
| 602 | iscsit_dec_conn_usage_count(conn_ptr); |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * Check for any connection recovery entires containing CID. |
| 607 | * We use the original ExpStatSN sent in the first login request |
| 608 | * to acknowledge commands for the failed connection. |
| 609 | * |
| 610 | * Also note that an explict logout may have already been sent, |
| 611 | * but the response may not be sent due to additional connection |
| 612 | * loss. |
| 613 | */ |
| 614 | if (sess->sess_ops->ErrorRecoveryLevel == 2) { |
| 615 | cr = iscsit_get_inactive_connection_recovery_entry( |
| 616 | sess, cid); |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 617 | if (cr) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 618 | pr_debug("Performing implicit logout" |
| 619 | " for connection recovery on CID: %hu\n", |
| 620 | conn->cid); |
| 621 | iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | /* |
| 626 | * Else we follow item 4 from the login table in that we have |
| 627 | * found an existing ISID and a valid/existing TSIH and a new |
| 628 | * CID we go ahead and continue to add a new connection to the |
| 629 | * session. |
| 630 | */ |
| 631 | pr_debug("Adding CID %hu to existing session for %s.\n", |
| 632 | cid, sess->sess_ops->InitiatorName); |
| 633 | |
| 634 | if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { |
| 635 | pr_err("Adding additional connection to this session" |
| 636 | " would exceed MaxConnections %d, login failed.\n", |
| 637 | sess->sess_ops->MaxConnections); |
| 638 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 639 | ISCSI_LOGIN_STATUS_ISID_ERROR); |
| 640 | return -1; |
| 641 | } |
| 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | static void iscsi_post_login_start_timers(struct iscsi_conn *conn) |
| 647 | { |
| 648 | struct iscsi_session *sess = conn->sess; |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 649 | /* |
Colin Ian King | 3fc6a64 | 2016-09-02 15:30:34 +0100 | [diff] [blame] | 650 | * FIXME: Unsolicited NopIN support for ISER |
Nicholas Bellinger | 03aa207 | 2013-03-06 21:54:38 -0800 | [diff] [blame] | 651 | */ |
| 652 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| 653 | return; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 654 | |
| 655 | if (!sess->sess_ops->SessionType) |
| 656 | iscsit_start_nopin_timer(conn); |
| 657 | } |
| 658 | |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 659 | int iscsit_start_kthreads(struct iscsi_conn *conn) |
Nicholas Bellinger | 88dcd2d | 2015-02-26 22:19:15 -0800 | [diff] [blame] | 660 | { |
| 661 | int ret = 0; |
| 662 | |
| 663 | spin_lock(&iscsit_global->ts_bitmap_lock); |
| 664 | conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, |
| 665 | ISCSIT_BITMAP_BITS, get_order(1)); |
| 666 | spin_unlock(&iscsit_global->ts_bitmap_lock); |
| 667 | |
| 668 | if (conn->bitmap_id < 0) { |
| 669 | pr_err("bitmap_find_free_region() failed for" |
| 670 | " iscsit_start_kthreads()\n"); |
| 671 | return -ENOMEM; |
| 672 | } |
| 673 | |
| 674 | conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, |
| 675 | "%s", ISCSI_TX_THREAD_NAME); |
| 676 | if (IS_ERR(conn->tx_thread)) { |
| 677 | pr_err("Unable to start iscsi_target_tx_thread\n"); |
| 678 | ret = PTR_ERR(conn->tx_thread); |
| 679 | goto out_bitmap; |
| 680 | } |
| 681 | conn->tx_thread_active = true; |
| 682 | |
| 683 | conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, |
| 684 | "%s", ISCSI_RX_THREAD_NAME); |
| 685 | if (IS_ERR(conn->rx_thread)) { |
| 686 | pr_err("Unable to start iscsi_target_rx_thread\n"); |
| 687 | ret = PTR_ERR(conn->rx_thread); |
| 688 | goto out_tx; |
| 689 | } |
| 690 | conn->rx_thread_active = true; |
| 691 | |
| 692 | return 0; |
| 693 | out_tx: |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 694 | send_sig(SIGINT, conn->tx_thread, 1); |
Nicholas Bellinger | 88dcd2d | 2015-02-26 22:19:15 -0800 | [diff] [blame] | 695 | kthread_stop(conn->tx_thread); |
| 696 | conn->tx_thread_active = false; |
| 697 | out_bitmap: |
| 698 | spin_lock(&iscsit_global->ts_bitmap_lock); |
| 699 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, |
| 700 | get_order(1)); |
| 701 | spin_unlock(&iscsit_global->ts_bitmap_lock); |
| 702 | return ret; |
| 703 | } |
| 704 | |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 705 | void iscsi_post_login_handler( |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 706 | struct iscsi_np *np, |
| 707 | struct iscsi_conn *conn, |
| 708 | u8 zero_tsih) |
| 709 | { |
| 710 | int stop_timer = 0; |
| 711 | struct iscsi_session *sess = conn->sess; |
| 712 | struct se_session *se_sess = sess->se_sess; |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 713 | struct iscsi_portal_group *tpg = sess->tpg; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 714 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 715 | |
| 716 | iscsit_inc_conn_usage_count(conn); |
| 717 | |
| 718 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, |
| 719 | ISCSI_LOGIN_STATUS_ACCEPT); |
| 720 | |
| 721 | pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); |
| 722 | conn->conn_state = TARG_CONN_STATE_LOGGED_IN; |
| 723 | |
| 724 | iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 725 | /* |
| 726 | * SCSI Initiator -> SCSI Target Port Mapping |
| 727 | */ |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 728 | if (!zero_tsih) { |
| 729 | iscsi_set_session_parameters(sess->sess_ops, |
| 730 | conn->param_list, 0); |
| 731 | iscsi_release_param_list(conn->param_list); |
| 732 | conn->param_list = NULL; |
| 733 | |
| 734 | spin_lock_bh(&sess->conn_lock); |
| 735 | atomic_set(&sess->session_continuation, 0); |
| 736 | if (sess->session_state == TARG_SESS_STATE_FAILED) { |
| 737 | pr_debug("Moving to" |
| 738 | " TARG_SESS_STATE_LOGGED_IN.\n"); |
| 739 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; |
| 740 | stop_timer = 1; |
| 741 | } |
| 742 | |
Andy Grover | dc58f76 | 2015-08-24 10:26:05 -0700 | [diff] [blame] | 743 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" |
| 744 | " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 745 | &conn->local_sockaddr, tpg->tpgt); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 746 | |
| 747 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); |
| 748 | atomic_inc(&sess->nconn); |
| 749 | pr_debug("Incremented iSCSI Connection count to %hu" |
| 750 | " from node: %s\n", atomic_read(&sess->nconn), |
| 751 | sess->sess_ops->InitiatorName); |
| 752 | spin_unlock_bh(&sess->conn_lock); |
| 753 | |
Nicholas Bellinger | 88dcd2d | 2015-02-26 22:19:15 -0800 | [diff] [blame] | 754 | iscsi_post_login_start_timers(conn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 755 | /* |
| 756 | * Determine CPU mask to ensure connection's RX and TX kthreads |
| 757 | * are scheduled on the same CPU. |
| 758 | */ |
| 759 | iscsit_thread_get_cpumask(conn); |
| 760 | conn->conn_rx_reset_cpumask = 1; |
| 761 | conn->conn_tx_reset_cpumask = 1; |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 762 | /* |
| 763 | * Wakeup the sleeping iscsi_target_rx_thread() now that |
| 764 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. |
| 765 | */ |
| 766 | complete(&conn->rx_login_comp); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 767 | iscsit_dec_conn_usage_count(conn); |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 768 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 769 | if (stop_timer) { |
| 770 | spin_lock_bh(&se_tpg->session_lock); |
| 771 | iscsit_stop_time2retain_timer(sess); |
| 772 | spin_unlock_bh(&se_tpg->session_lock); |
| 773 | } |
| 774 | iscsit_dec_session_usage_count(sess); |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 775 | return; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); |
| 779 | iscsi_release_param_list(conn->param_list); |
| 780 | conn->param_list = NULL; |
| 781 | |
| 782 | iscsit_determine_maxcmdsn(sess); |
| 783 | |
| 784 | spin_lock_bh(&se_tpg->session_lock); |
| 785 | __transport_register_session(&sess->tpg->tpg_se_tpg, |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 786 | se_sess->se_node_acl, se_sess, sess); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 787 | pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
| 788 | sess->session_state = TARG_SESS_STATE_LOGGED_IN; |
| 789 | |
Andy Grover | dc58f76 | 2015-08-24 10:26:05 -0700 | [diff] [blame] | 790 | pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", |
| 791 | conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, |
Nicholas Bellinger | 2f9bc89 | 2012-01-16 23:33:48 -0800 | [diff] [blame] | 792 | tpg->tpgt); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 793 | |
| 794 | spin_lock_bh(&sess->conn_lock); |
| 795 | list_add_tail(&conn->conn_list, &sess->sess_conn_list); |
| 796 | atomic_inc(&sess->nconn); |
| 797 | pr_debug("Incremented iSCSI Connection count to %hu from node:" |
| 798 | " %s\n", atomic_read(&sess->nconn), |
| 799 | sess->sess_ops->InitiatorName); |
| 800 | spin_unlock_bh(&sess->conn_lock); |
| 801 | |
| 802 | sess->sid = tpg->sid++; |
| 803 | if (!sess->sid) |
| 804 | sess->sid = tpg->sid++; |
| 805 | pr_debug("Established iSCSI session from node: %s\n", |
| 806 | sess->sess_ops->InitiatorName); |
| 807 | |
| 808 | tpg->nsessions++; |
| 809 | if (tpg->tpg_tiqn) |
| 810 | tpg->tpg_tiqn->tiqn_nsessions++; |
| 811 | |
| 812 | pr_debug("Incremented number of active iSCSI sessions to %u on" |
| 813 | " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); |
| 814 | spin_unlock_bh(&se_tpg->session_lock); |
| 815 | |
| 816 | iscsi_post_login_start_timers(conn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 817 | /* |
| 818 | * Determine CPU mask to ensure connection's RX and TX kthreads |
| 819 | * are scheduled on the same CPU. |
| 820 | */ |
| 821 | iscsit_thread_get_cpumask(conn); |
| 822 | conn->conn_rx_reset_cpumask = 1; |
| 823 | conn->conn_tx_reset_cpumask = 1; |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 824 | /* |
| 825 | * Wakeup the sleeping iscsi_target_rx_thread() now that |
| 826 | * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. |
| 827 | */ |
| 828 | complete(&conn->rx_login_comp); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 829 | iscsit_dec_conn_usage_count(conn); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | static void iscsi_handle_login_thread_timeout(unsigned long data) |
| 833 | { |
| 834 | struct iscsi_np *np = (struct iscsi_np *) data; |
| 835 | |
| 836 | spin_lock_bh(&np->np_thread_lock); |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 837 | pr_err("iSCSI Login timeout on Network Portal %pISpc\n", |
| 838 | &np->np_sockaddr); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 839 | |
| 840 | if (np->np_login_timer_flags & ISCSI_TF_STOP) { |
| 841 | spin_unlock_bh(&np->np_thread_lock); |
| 842 | return; |
| 843 | } |
| 844 | |
| 845 | if (np->np_thread) |
| 846 | send_sig(SIGINT, np->np_thread, 1); |
| 847 | |
| 848 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; |
| 849 | spin_unlock_bh(&np->np_thread_lock); |
| 850 | } |
| 851 | |
| 852 | static void iscsi_start_login_thread_timer(struct iscsi_np *np) |
| 853 | { |
| 854 | /* |
| 855 | * This used the TA_LOGIN_TIMEOUT constant because at this |
| 856 | * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout |
| 857 | */ |
| 858 | spin_lock_bh(&np->np_thread_lock); |
| 859 | init_timer(&np->np_login_timer); |
| 860 | np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); |
| 861 | np->np_login_timer.data = (unsigned long)np; |
| 862 | np->np_login_timer.function = iscsi_handle_login_thread_timeout; |
| 863 | np->np_login_timer_flags &= ~ISCSI_TF_STOP; |
| 864 | np->np_login_timer_flags |= ISCSI_TF_RUNNING; |
| 865 | add_timer(&np->np_login_timer); |
| 866 | |
| 867 | pr_debug("Added timeout timer to iSCSI login request for" |
| 868 | " %u seconds.\n", TA_LOGIN_TIMEOUT); |
| 869 | spin_unlock_bh(&np->np_thread_lock); |
| 870 | } |
| 871 | |
| 872 | static void iscsi_stop_login_thread_timer(struct iscsi_np *np) |
| 873 | { |
| 874 | spin_lock_bh(&np->np_thread_lock); |
| 875 | if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { |
| 876 | spin_unlock_bh(&np->np_thread_lock); |
| 877 | return; |
| 878 | } |
| 879 | np->np_login_timer_flags |= ISCSI_TF_STOP; |
| 880 | spin_unlock_bh(&np->np_thread_lock); |
| 881 | |
| 882 | del_timer_sync(&np->np_login_timer); |
| 883 | |
| 884 | spin_lock_bh(&np->np_thread_lock); |
| 885 | np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; |
| 886 | spin_unlock_bh(&np->np_thread_lock); |
| 887 | } |
| 888 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 889 | int iscsit_setup_np( |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 890 | struct iscsi_np *np, |
Andy Grover | 13a3cf0 | 2015-08-24 10:26:06 -0700 | [diff] [blame] | 891 | struct sockaddr_storage *sockaddr) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 892 | { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 893 | struct socket *sock = NULL; |
Nicholas Bellinger | 837f645 | 2013-09-09 16:24:46 -0700 | [diff] [blame] | 894 | int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 895 | |
| 896 | switch (np->np_network_transport) { |
| 897 | case ISCSI_TCP: |
| 898 | np->np_ip_proto = IPPROTO_TCP; |
| 899 | np->np_sock_type = SOCK_STREAM; |
| 900 | break; |
| 901 | case ISCSI_SCTP_TCP: |
| 902 | np->np_ip_proto = IPPROTO_SCTP; |
| 903 | np->np_sock_type = SOCK_STREAM; |
| 904 | break; |
| 905 | case ISCSI_SCTP_UDP: |
| 906 | np->np_ip_proto = IPPROTO_SCTP; |
| 907 | np->np_sock_type = SOCK_SEQPACKET; |
| 908 | break; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 909 | default: |
| 910 | pr_err("Unsupported network_transport: %d\n", |
| 911 | np->np_network_transport); |
| 912 | return -EINVAL; |
| 913 | } |
| 914 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 915 | np->np_ip_proto = IPPROTO_TCP; |
| 916 | np->np_sock_type = SOCK_STREAM; |
| 917 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 918 | ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
| 919 | np->np_ip_proto, &sock); |
| 920 | if (ret < 0) { |
| 921 | pr_err("sock_create() failed.\n"); |
| 922 | return ret; |
| 923 | } |
| 924 | np->np_socket = sock; |
| 925 | /* |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 926 | * Setup the np->np_sockaddr from the passed sockaddr setup |
| 927 | * in iscsi_target_configfs.c code.. |
| 928 | */ |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 929 | memcpy(&np->np_sockaddr, sockaddr, |
Andy Grover | 13a3cf0 | 2015-08-24 10:26:06 -0700 | [diff] [blame] | 930 | sizeof(struct sockaddr_storage)); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 931 | |
| 932 | if (sockaddr->ss_family == AF_INET6) |
| 933 | len = sizeof(struct sockaddr_in6); |
| 934 | else |
| 935 | len = sizeof(struct sockaddr_in); |
| 936 | /* |
| 937 | * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. |
| 938 | */ |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 939 | /* FIXME: Someone please explain why this is endian-safe */ |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 940 | opt = 1; |
| 941 | if (np->np_network_transport == ISCSI_TCP) { |
| 942 | ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, |
| 943 | (char *)&opt, sizeof(opt)); |
| 944 | if (ret < 0) { |
| 945 | pr_err("kernel_setsockopt() for TCP_NODELAY" |
| 946 | " failed: %d\n", ret); |
| 947 | goto fail; |
| 948 | } |
| 949 | } |
| 950 | |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 951 | /* FIXME: Someone please explain why this is endian-safe */ |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 952 | ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
| 953 | (char *)&opt, sizeof(opt)); |
| 954 | if (ret < 0) { |
| 955 | pr_err("kernel_setsockopt() for SO_REUSEADDR" |
| 956 | " failed\n"); |
| 957 | goto fail; |
| 958 | } |
| 959 | |
Dax Kelson | 9f9ef6d | 2012-02-03 23:40:25 -0700 | [diff] [blame] | 960 | ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
| 961 | (char *)&opt, sizeof(opt)); |
| 962 | if (ret < 0) { |
| 963 | pr_err("kernel_setsockopt() for IP_FREEBIND" |
| 964 | " failed\n"); |
| 965 | goto fail; |
| 966 | } |
| 967 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 968 | ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
| 969 | if (ret < 0) { |
| 970 | pr_err("kernel_bind() failed: %d\n", ret); |
| 971 | goto fail; |
| 972 | } |
| 973 | |
| 974 | ret = kernel_listen(sock, backlog); |
| 975 | if (ret != 0) { |
| 976 | pr_err("kernel_listen() failed: %d\n", ret); |
| 977 | goto fail; |
| 978 | } |
| 979 | |
| 980 | return 0; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 981 | fail: |
| 982 | np->np_socket = NULL; |
Joern Engel | 94e16e9 | 2014-09-02 17:49:53 -0400 | [diff] [blame] | 983 | sock_release(sock); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 984 | return ret; |
| 985 | } |
| 986 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 987 | int iscsi_target_setup_login_socket( |
| 988 | struct iscsi_np *np, |
Andy Grover | 13a3cf0 | 2015-08-24 10:26:06 -0700 | [diff] [blame] | 989 | struct sockaddr_storage *sockaddr) |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 990 | { |
| 991 | struct iscsit_transport *t; |
| 992 | int rc; |
| 993 | |
| 994 | t = iscsit_get_transport(np->np_network_transport); |
| 995 | if (!t) |
| 996 | return -EINVAL; |
| 997 | |
| 998 | rc = t->iscsit_setup_np(np, sockaddr); |
| 999 | if (rc < 0) { |
| 1000 | iscsit_put_transport(t); |
| 1001 | return rc; |
| 1002 | } |
| 1003 | |
| 1004 | np->np_transport = t; |
Sagi Grimberg | 14f4b54 | 2014-04-29 13:13:47 +0300 | [diff] [blame] | 1005 | np->enabled = true; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1006 | return 0; |
| 1007 | } |
| 1008 | |
| 1009 | int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) |
| 1010 | { |
| 1011 | struct socket *new_sock, *sock = np->np_socket; |
| 1012 | struct sockaddr_in sock_in; |
| 1013 | struct sockaddr_in6 sock_in6; |
| 1014 | int rc, err; |
| 1015 | |
| 1016 | rc = kernel_accept(sock, &new_sock, 0); |
| 1017 | if (rc < 0) |
| 1018 | return rc; |
| 1019 | |
| 1020 | conn->sock = new_sock; |
| 1021 | conn->login_family = np->np_sockaddr.ss_family; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1022 | |
| 1023 | if (np->np_sockaddr.ss_family == AF_INET6) { |
| 1024 | memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); |
| 1025 | |
| 1026 | rc = conn->sock->ops->getname(conn->sock, |
| 1027 | (struct sockaddr *)&sock_in6, &err, 1); |
| 1028 | if (!rc) { |
Andy Grover | dc58f76 | 2015-08-24 10:26:05 -0700 | [diff] [blame] | 1029 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
| 1030 | memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); |
| 1031 | } else { |
| 1032 | /* Pretend to be an ipv4 socket */ |
| 1033 | sock_in.sin_family = AF_INET; |
| 1034 | sock_in.sin_port = sock_in6.sin6_port; |
| 1035 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); |
| 1036 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); |
| 1037 | } |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | rc = conn->sock->ops->getname(conn->sock, |
| 1041 | (struct sockaddr *)&sock_in6, &err, 0); |
| 1042 | if (!rc) { |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 1043 | if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { |
| 1044 | memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); |
| 1045 | } else { |
| 1046 | /* Pretend to be an ipv4 socket */ |
| 1047 | sock_in.sin_family = AF_INET; |
| 1048 | sock_in.sin_port = sock_in6.sin6_port; |
| 1049 | memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); |
| 1050 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); |
| 1051 | } |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1052 | } |
| 1053 | } else { |
| 1054 | memset(&sock_in, 0, sizeof(struct sockaddr_in)); |
| 1055 | |
| 1056 | rc = conn->sock->ops->getname(conn->sock, |
| 1057 | (struct sockaddr *)&sock_in, &err, 1); |
Andy Grover | dc58f76 | 2015-08-24 10:26:05 -0700 | [diff] [blame] | 1058 | if (!rc) |
| 1059 | memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1060 | |
| 1061 | rc = conn->sock->ops->getname(conn->sock, |
| 1062 | (struct sockaddr *)&sock_in, &err, 0); |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 1063 | if (!rc) |
| 1064 | memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | return 0; |
| 1068 | } |
| 1069 | |
| 1070 | int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) |
| 1071 | { |
| 1072 | struct iscsi_login_req *login_req; |
| 1073 | u32 padding = 0, payload_length; |
| 1074 | |
| 1075 | if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) |
| 1076 | return -1; |
| 1077 | |
| 1078 | login_req = (struct iscsi_login_req *)login->req; |
| 1079 | payload_length = ntoh24(login_req->dlength); |
| 1080 | padding = ((-payload_length) & 3); |
| 1081 | |
| 1082 | pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," |
| 1083 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", |
| 1084 | login_req->flags, login_req->itt, login_req->cmdsn, |
| 1085 | login_req->exp_statsn, login_req->cid, payload_length); |
| 1086 | /* |
| 1087 | * Setup the initial iscsi_login values from the leading |
| 1088 | * login request PDU. |
| 1089 | */ |
| 1090 | if (login->first_request) { |
| 1091 | login_req = (struct iscsi_login_req *)login->req; |
| 1092 | login->leading_connection = (!login_req->tsih) ? 1 : 0; |
Nicholas Bellinger | 3e1c81a | 2013-03-06 22:18:24 -0800 | [diff] [blame] | 1093 | login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1094 | login->version_min = login_req->min_version; |
| 1095 | login->version_max = login_req->max_version; |
| 1096 | memcpy(login->isid, login_req->isid, 6); |
| 1097 | login->cmd_sn = be32_to_cpu(login_req->cmdsn); |
| 1098 | login->init_task_tag = login_req->itt; |
| 1099 | login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); |
| 1100 | login->cid = be16_to_cpu(login_req->cid); |
| 1101 | login->tsih = be16_to_cpu(login_req->tsih); |
| 1102 | } |
| 1103 | |
| 1104 | if (iscsi_target_check_login_request(conn, login) < 0) |
| 1105 | return -1; |
| 1106 | |
| 1107 | memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); |
| 1108 | if (iscsi_login_rx_data(conn, login->req_buf, |
| 1109 | payload_length + padding) < 0) |
| 1110 | return -1; |
| 1111 | |
| 1112 | return 0; |
| 1113 | } |
| 1114 | |
| 1115 | int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, |
| 1116 | u32 length) |
| 1117 | { |
| 1118 | if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) |
| 1119 | return -1; |
| 1120 | |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
| 1124 | static int |
| 1125 | iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) |
| 1126 | { |
| 1127 | int rc; |
| 1128 | |
| 1129 | if (!t->owner) { |
| 1130 | conn->conn_transport = t; |
| 1131 | return 0; |
| 1132 | } |
| 1133 | |
| 1134 | rc = try_module_get(t->owner); |
| 1135 | if (!rc) { |
| 1136 | pr_err("try_module_get() failed for %s\n", t->name); |
| 1137 | return -EINVAL; |
| 1138 | } |
| 1139 | |
| 1140 | conn->conn_transport = t; |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1144 | void iscsi_target_login_sess_out(struct iscsi_conn *conn, |
| 1145 | struct iscsi_np *np, bool zero_tsih, bool new_sess) |
| 1146 | { |
Christophe Vu-Brugier | 0bcc297 | 2014-06-06 17:15:16 +0200 | [diff] [blame] | 1147 | if (!new_sess) |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1148 | goto old_sess_out; |
| 1149 | |
| 1150 | pr_err("iSCSI Login negotiation failed.\n"); |
| 1151 | iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| 1152 | ISCSI_LOGIN_STATUS_INIT_ERR); |
| 1153 | if (!zero_tsih || !conn->sess) |
| 1154 | goto old_sess_out; |
| 1155 | if (conn->sess->se_sess) |
| 1156 | transport_free_session(conn->sess->se_sess); |
| 1157 | if (conn->sess->session_index != 0) { |
| 1158 | spin_lock_bh(&sess_idr_lock); |
| 1159 | idr_remove(&sess_idr, conn->sess->session_index); |
| 1160 | spin_unlock_bh(&sess_idr_lock); |
| 1161 | } |
| 1162 | kfree(conn->sess->sess_ops); |
| 1163 | kfree(conn->sess); |
Sagi Grimberg | a0b3b9b | 2014-12-15 15:08:54 +0200 | [diff] [blame] | 1164 | conn->sess = NULL; |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1165 | |
| 1166 | old_sess_out: |
| 1167 | iscsi_stop_login_thread_timer(np); |
| 1168 | /* |
| 1169 | * If login negotiation fails check if the Time2Retain timer |
| 1170 | * needs to be restarted. |
| 1171 | */ |
| 1172 | if (!zero_tsih && conn->sess) { |
| 1173 | spin_lock_bh(&conn->sess->conn_lock); |
| 1174 | if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { |
| 1175 | struct se_portal_group *se_tpg = |
Andy Grover | 60bfcf8 | 2013-10-09 11:05:58 -0700 | [diff] [blame] | 1176 | &conn->tpg->tpg_se_tpg; |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1177 | |
| 1178 | atomic_set(&conn->sess->session_continuation, 0); |
| 1179 | spin_unlock_bh(&conn->sess->conn_lock); |
| 1180 | spin_lock_bh(&se_tpg->session_lock); |
| 1181 | iscsit_start_time2retain_handler(conn->sess); |
| 1182 | spin_unlock_bh(&se_tpg->session_lock); |
| 1183 | } else |
| 1184 | spin_unlock_bh(&conn->sess->conn_lock); |
| 1185 | iscsit_dec_session_usage_count(conn->sess); |
| 1186 | } |
| 1187 | |
Herbert Xu | 69110e3 | 2016-01-24 21:19:52 +0800 | [diff] [blame] | 1188 | ahash_request_free(conn->conn_tx_hash); |
| 1189 | if (conn->conn_rx_hash) { |
| 1190 | struct crypto_ahash *tfm; |
| 1191 | |
| 1192 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); |
| 1193 | ahash_request_free(conn->conn_rx_hash); |
| 1194 | crypto_free_ahash(tfm); |
| 1195 | } |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1196 | |
Joern Engel | fbecb65 | 2014-09-02 17:49:47 -0400 | [diff] [blame] | 1197 | free_cpumask_var(conn->conn_cpumask); |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1198 | |
| 1199 | kfree(conn->conn_ops); |
| 1200 | |
| 1201 | if (conn->param_list) { |
| 1202 | iscsi_release_param_list(conn->param_list); |
| 1203 | conn->param_list = NULL; |
| 1204 | } |
| 1205 | iscsi_target_nego_release(conn); |
| 1206 | |
| 1207 | if (conn->sock) { |
| 1208 | sock_release(conn->sock); |
| 1209 | conn->sock = NULL; |
| 1210 | } |
| 1211 | |
Sagi Grimberg | 954f237 | 2014-12-02 16:57:17 +0200 | [diff] [blame] | 1212 | if (conn->conn_transport->iscsit_wait_conn) |
| 1213 | conn->conn_transport->iscsit_wait_conn(conn); |
| 1214 | |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1215 | if (conn->conn_transport->iscsit_free_conn) |
| 1216 | conn->conn_transport->iscsit_free_conn(conn); |
| 1217 | |
| 1218 | iscsit_put_transport(conn->conn_transport); |
| 1219 | kfree(conn); |
| 1220 | } |
| 1221 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1222 | static int __iscsi_target_login_thread(struct iscsi_np *np) |
| 1223 | { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1224 | u8 *buffer, zero_tsih = 0; |
Mikulas Patocka | 81a9c5e | 2014-06-23 13:42:37 -0400 | [diff] [blame] | 1225 | int ret = 0, rc; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1226 | struct iscsi_conn *conn = NULL; |
| 1227 | struct iscsi_login *login; |
| 1228 | struct iscsi_portal_group *tpg = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1229 | struct iscsi_login_req *pdu; |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1230 | struct iscsi_tpg_np *tpg_np; |
| 1231 | bool new_sess = false; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1232 | |
| 1233 | flush_signals(current); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1234 | |
| 1235 | spin_lock_bh(&np->np_thread_lock); |
Nicholas Bellinger | b51a716 | 2017-08-04 23:59:31 -0700 | [diff] [blame] | 1236 | if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1237 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
Nicholas Bellinger | b51a716 | 2017-08-04 23:59:31 -0700 | [diff] [blame] | 1238 | spin_unlock_bh(&np->np_thread_lock); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1239 | complete(&np->np_restart_comp); |
Nicholas Bellinger | b51a716 | 2017-08-04 23:59:31 -0700 | [diff] [blame] | 1240 | return 1; |
Mikulas Patocka | 81a9c5e | 2014-06-23 13:42:37 -0400 | [diff] [blame] | 1241 | } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { |
| 1242 | spin_unlock_bh(&np->np_thread_lock); |
| 1243 | goto exit; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1244 | } else { |
| 1245 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
| 1246 | } |
| 1247 | spin_unlock_bh(&np->np_thread_lock); |
| 1248 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1249 | conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
| 1250 | if (!conn) { |
| 1251 | pr_err("Could not allocate memory for" |
| 1252 | " new connection\n"); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1253 | /* Get another socket */ |
| 1254 | return 1; |
| 1255 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1256 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
| 1257 | conn->conn_state = TARG_CONN_STATE_FREE; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1258 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1259 | if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
| 1260 | kfree(conn); |
| 1261 | return 1; |
| 1262 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1263 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1264 | rc = np->np_transport->iscsit_accept_np(np, conn); |
| 1265 | if (rc == -ENOSYS) { |
| 1266 | complete(&np->np_restart_comp); |
| 1267 | iscsit_put_transport(conn->conn_transport); |
| 1268 | kfree(conn); |
| 1269 | conn = NULL; |
| 1270 | goto exit; |
| 1271 | } else if (rc < 0) { |
| 1272 | spin_lock_bh(&np->np_thread_lock); |
Nicholas Bellinger | b51a716 | 2017-08-04 23:59:31 -0700 | [diff] [blame] | 1273 | if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { |
| 1274 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1275 | spin_unlock_bh(&np->np_thread_lock); |
| 1276 | complete(&np->np_restart_comp); |
Nicholas Bellinger | c9a03c1 | 2013-08-18 15:07:44 -0700 | [diff] [blame] | 1277 | iscsit_put_transport(conn->conn_transport); |
| 1278 | kfree(conn); |
| 1279 | conn = NULL; |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1280 | /* Get another socket */ |
| 1281 | return 1; |
| 1282 | } |
| 1283 | spin_unlock_bh(&np->np_thread_lock); |
| 1284 | iscsit_put_transport(conn->conn_transport); |
| 1285 | kfree(conn); |
| 1286 | conn = NULL; |
| 1287 | goto out; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1288 | } |
| 1289 | /* |
| 1290 | * Perform the remaining iSCSI connection initialization items.. |
| 1291 | */ |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1292 | login = iscsi_login_init_conn(conn); |
| 1293 | if (!login) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1294 | goto new_sess_out; |
| 1295 | } |
| 1296 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1297 | iscsi_start_login_thread_timer(np); |
| 1298 | |
| 1299 | pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
| 1300 | conn->conn_state = TARG_CONN_STATE_XPT_UP; |
| 1301 | /* |
| 1302 | * This will process the first login request + payload.. |
| 1303 | */ |
| 1304 | rc = np->np_transport->iscsit_get_login_rx(conn, login); |
| 1305 | if (rc == 1) |
| 1306 | return 1; |
| 1307 | else if (rc < 0) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1308 | goto new_sess_out; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1309 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1310 | buffer = &login->req[0]; |
| 1311 | pdu = (struct iscsi_login_req *)buffer; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1312 | /* |
| 1313 | * Used by iscsit_tx_login_rsp() for Login Resonses PDUs |
| 1314 | * when Status-Class != 0. |
| 1315 | */ |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1316 | conn->login_itt = pdu->itt; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1317 | |
| 1318 | spin_lock_bh(&np->np_thread_lock); |
| 1319 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
| 1320 | spin_unlock_bh(&np->np_thread_lock); |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 1321 | pr_err("iSCSI Network Portal on %pISpc currently not" |
| 1322 | " active.\n", &np->np_sockaddr); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1323 | iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| 1324 | ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
| 1325 | goto new_sess_out; |
| 1326 | } |
| 1327 | spin_unlock_bh(&np->np_thread_lock); |
| 1328 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1329 | conn->network_transport = np->np_network_transport; |
| 1330 | |
Andy Grover | dc58f76 | 2015-08-24 10:26:05 -0700 | [diff] [blame] | 1331 | pr_debug("Received iSCSI login request from %pISpc on %s Network" |
| 1332 | " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, |
Andy Grover | 69d7557 | 2015-08-24 10:26:04 -0700 | [diff] [blame] | 1333 | &conn->local_sockaddr); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1334 | |
| 1335 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); |
| 1336 | conn->conn_state = TARG_CONN_STATE_IN_LOGIN; |
| 1337 | |
| 1338 | if (iscsi_login_check_initiator_version(conn, pdu->max_version, |
| 1339 | pdu->min_version) < 0) |
| 1340 | goto new_sess_out; |
| 1341 | |
| 1342 | zero_tsih = (pdu->tsih == 0x0000); |
Andy Grover | ee1b1b9 | 2012-07-12 17:34:54 -0700 | [diff] [blame] | 1343 | if (zero_tsih) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1344 | /* |
| 1345 | * This is the leading connection of a new session. |
| 1346 | * We wait until after authentication to check for |
| 1347 | * session reinstatement. |
| 1348 | */ |
| 1349 | if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) |
| 1350 | goto new_sess_out; |
| 1351 | } else { |
| 1352 | /* |
| 1353 | * Add a new connection to an existing session. |
| 1354 | * We check for a non-existant session in |
| 1355 | * iscsi_login_non_zero_tsih_s2() below based |
| 1356 | * on ISID/TSIH, but wait until after authentication |
| 1357 | * to check for connection reinstatement, etc. |
| 1358 | */ |
| 1359 | if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) |
| 1360 | goto new_sess_out; |
| 1361 | } |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1362 | /* |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1363 | * SessionType: Discovery |
| 1364 | * |
| 1365 | * Locates Default Portal |
| 1366 | * |
| 1367 | * SessionType: Normal |
| 1368 | * |
| 1369 | * Locates Target Portal from NP -> Target IQN |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1370 | */ |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1371 | rc = iscsi_target_locate_portal(np, conn, login); |
| 1372 | if (rc < 0) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1373 | tpg = conn->tpg; |
| 1374 | goto new_sess_out; |
| 1375 | } |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1376 | login->zero_tsih = zero_tsih; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1377 | |
Feng Li | 8abc718 | 2016-07-12 06:15:44 +0800 | [diff] [blame] | 1378 | if (conn->sess) |
| 1379 | conn->sess->se_sess->sup_prot_ops = |
| 1380 | conn->conn_transport->iscsit_get_sup_prot_ops(conn); |
Sagi Grimberg | 23a548e | 2014-12-02 16:57:35 +0200 | [diff] [blame] | 1381 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1382 | tpg = conn->tpg; |
| 1383 | if (!tpg) { |
| 1384 | pr_err("Unable to locate struct iscsi_conn->tpg\n"); |
| 1385 | goto new_sess_out; |
| 1386 | } |
| 1387 | |
| 1388 | if (zero_tsih) { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1389 | if (iscsi_login_zero_tsih_s2(conn) < 0) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1390 | goto new_sess_out; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1391 | } else { |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1392 | if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1393 | goto old_sess_out; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1394 | } |
| 1395 | |
Varun Prakash | 42bc3e5 | 2016-04-20 00:00:12 +0530 | [diff] [blame] | 1396 | if (conn->conn_transport->iscsit_validate_params) { |
| 1397 | ret = conn->conn_transport->iscsit_validate_params(conn); |
| 1398 | if (ret < 0) { |
| 1399 | if (zero_tsih) |
| 1400 | goto new_sess_out; |
| 1401 | else |
| 1402 | goto old_sess_out; |
| 1403 | } |
| 1404 | } |
| 1405 | |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1406 | ret = iscsi_target_start_negotiation(login, conn); |
| 1407 | if (ret < 0) |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1408 | goto new_sess_out; |
| 1409 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1410 | iscsi_stop_login_thread_timer(np); |
| 1411 | |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1412 | if (ret == 1) { |
| 1413 | tpg_np = conn->tpg_np; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1414 | |
Nicholas Bellinger | e541986 | 2015-07-22 23:14:19 -0700 | [diff] [blame] | 1415 | iscsi_post_login_handler(np, conn, zero_tsih); |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1416 | iscsit_deaccess_np(np, tpg, tpg_np); |
| 1417 | } |
| 1418 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1419 | tpg = NULL; |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1420 | tpg_np = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1421 | /* Get another socket */ |
| 1422 | return 1; |
| 1423 | |
| 1424 | new_sess_out: |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1425 | new_sess = true; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1426 | old_sess_out: |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1427 | tpg_np = conn->tpg_np; |
| 1428 | iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); |
| 1429 | new_sess = false; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1430 | |
| 1431 | if (tpg) { |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1432 | iscsit_deaccess_np(np, tpg, tpg_np); |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1433 | tpg = NULL; |
Nicholas Bellinger | a91eb7d | 2013-08-15 12:49:02 -0700 | [diff] [blame] | 1434 | tpg_np = NULL; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1435 | } |
| 1436 | |
| 1437 | out: |
Mikulas Patocka | 81a9c5e | 2014-06-23 13:42:37 -0400 | [diff] [blame] | 1438 | return 1; |
| 1439 | |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1440 | exit: |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1441 | iscsi_stop_login_thread_timer(np); |
| 1442 | spin_lock_bh(&np->np_thread_lock); |
| 1443 | np->np_thread_state = ISCSI_NP_THREAD_EXIT; |
| 1444 | spin_unlock_bh(&np->np_thread_lock); |
Nicholas Bellinger | baa4d64 | 2013-03-06 21:54:13 -0800 | [diff] [blame] | 1445 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1446 | return 0; |
| 1447 | } |
| 1448 | |
| 1449 | int iscsi_target_login_thread(void *arg) |
| 1450 | { |
Jörn Engel | 8359cf4 | 2011-11-24 02:05:51 +0100 | [diff] [blame] | 1451 | struct iscsi_np *np = arg; |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1452 | int ret; |
| 1453 | |
| 1454 | allow_signal(SIGINT); |
| 1455 | |
Mikulas Patocka | 81a9c5e | 2014-06-23 13:42:37 -0400 | [diff] [blame] | 1456 | while (1) { |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1457 | ret = __iscsi_target_login_thread(np); |
| 1458 | /* |
| 1459 | * We break and exit here unless another sock_accept() call |
| 1460 | * is expected. |
| 1461 | */ |
| 1462 | if (ret != 1) |
| 1463 | break; |
| 1464 | } |
| 1465 | |
Jiang Yi | 49d33fd | 2017-05-16 17:57:55 +0800 | [diff] [blame] | 1466 | while (!kthread_should_stop()) { |
| 1467 | msleep(100); |
| 1468 | } |
| 1469 | |
Nicholas Bellinger | e48354c | 2011-07-23 06:43:04 +0000 | [diff] [blame] | 1470 | return 0; |
| 1471 | } |