1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the login functions used by the iSCSI Target driver. 3e48354ceSNicholas Bellinger * 4e48354ceSNicholas Bellinger * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9e48354ceSNicholas Bellinger * 10e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13e48354ceSNicholas Bellinger * (at your option) any later version. 14e48354ceSNicholas Bellinger * 15e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e48354ceSNicholas Bellinger * GNU General Public License for more details. 19e48354ceSNicholas Bellinger ******************************************************************************/ 20e48354ceSNicholas Bellinger 21e48354ceSNicholas Bellinger #include <linux/string.h> 22e48354ceSNicholas Bellinger #include <linux/kthread.h> 23e48354ceSNicholas Bellinger #include <linux/crypto.h> 2440401530SAl Viro #include <linux/idr.h> 25e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 26e48354ceSNicholas Bellinger #include <target/target_core_base.h> 27c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 28e48354ceSNicholas Bellinger 29e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_device.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_nego.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_login.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_stat.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 39e48354ceSNicholas Bellinger #include "iscsi_target.h" 40e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 41e48354ceSNicholas Bellinger 42e48354ceSNicholas Bellinger static int iscsi_login_init_conn(struct iscsi_conn *conn) 43e48354ceSNicholas Bellinger { 44d5627acbSRoland Dreier init_waitqueue_head(&conn->queues_wq); 45e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_list); 46e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_cmd_list); 47e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->immed_queue_list); 48e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->response_queue_list); 49e48354ceSNicholas Bellinger init_completion(&conn->conn_post_wait_comp); 50e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_comp); 51e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_rcfr_comp); 52e48354ceSNicholas Bellinger init_completion(&conn->conn_waiting_on_uc_comp); 53e48354ceSNicholas Bellinger init_completion(&conn->conn_logout_comp); 54e48354ceSNicholas Bellinger init_completion(&conn->rx_half_close_comp); 55e48354ceSNicholas Bellinger init_completion(&conn->tx_half_close_comp); 56e48354ceSNicholas Bellinger spin_lock_init(&conn->cmd_lock); 57e48354ceSNicholas Bellinger spin_lock_init(&conn->conn_usage_lock); 58e48354ceSNicholas Bellinger spin_lock_init(&conn->immed_queue_lock); 59e48354ceSNicholas Bellinger spin_lock_init(&conn->nopin_timer_lock); 60e48354ceSNicholas Bellinger spin_lock_init(&conn->response_queue_lock); 61e48354ceSNicholas Bellinger spin_lock_init(&conn->state_lock); 62e48354ceSNicholas Bellinger 63e48354ceSNicholas Bellinger if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { 64e48354ceSNicholas Bellinger pr_err("Unable to allocate conn->conn_cpumask\n"); 65e48354ceSNicholas Bellinger return -ENOMEM; 66e48354ceSNicholas Bellinger } 67e48354ceSNicholas Bellinger 68e48354ceSNicholas Bellinger return 0; 69e48354ceSNicholas Bellinger } 70e48354ceSNicholas Bellinger 71e48354ceSNicholas Bellinger /* 72e48354ceSNicholas Bellinger * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup 73e48354ceSNicholas Bellinger * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel 74e48354ceSNicholas Bellinger */ 75e48354ceSNicholas Bellinger int iscsi_login_setup_crypto(struct iscsi_conn *conn) 76e48354ceSNicholas Bellinger { 77e48354ceSNicholas Bellinger /* 78e48354ceSNicholas Bellinger * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts 79e48354ceSNicholas Bellinger * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback 80e48354ceSNicholas Bellinger * to software 1x8 byte slicing from crc32c.ko 81e48354ceSNicholas Bellinger */ 82e48354ceSNicholas Bellinger conn->conn_rx_hash.flags = 0; 83e48354ceSNicholas Bellinger conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0, 84e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 85e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_rx_hash.tfm)) { 86e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n"); 87e48354ceSNicholas Bellinger return -ENOMEM; 88e48354ceSNicholas Bellinger } 89e48354ceSNicholas Bellinger 90e48354ceSNicholas Bellinger conn->conn_tx_hash.flags = 0; 91e48354ceSNicholas Bellinger conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0, 92e48354ceSNicholas Bellinger CRYPTO_ALG_ASYNC); 93e48354ceSNicholas Bellinger if (IS_ERR(conn->conn_tx_hash.tfm)) { 94e48354ceSNicholas Bellinger pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n"); 95e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 96e48354ceSNicholas Bellinger return -ENOMEM; 97e48354ceSNicholas Bellinger } 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger return 0; 100e48354ceSNicholas Bellinger } 101e48354ceSNicholas Bellinger 102e48354ceSNicholas Bellinger static int iscsi_login_check_initiator_version( 103e48354ceSNicholas Bellinger struct iscsi_conn *conn, 104e48354ceSNicholas Bellinger u8 version_max, 105e48354ceSNicholas Bellinger u8 version_min) 106e48354ceSNicholas Bellinger { 107e48354ceSNicholas Bellinger if ((version_max != 0x00) || (version_min != 0x00)) { 108e48354ceSNicholas Bellinger pr_err("Unsupported iSCSI IETF Pre-RFC Revision," 109e48354ceSNicholas Bellinger " version Min/Max 0x%02x/0x%02x, rejecting login.\n", 110e48354ceSNicholas Bellinger version_min, version_max); 111e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 112e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_VERSION); 113e48354ceSNicholas Bellinger return -1; 114e48354ceSNicholas Bellinger } 115e48354ceSNicholas Bellinger 116e48354ceSNicholas Bellinger return 0; 117e48354ceSNicholas Bellinger } 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) 120e48354ceSNicholas Bellinger { 121e48354ceSNicholas Bellinger int sessiontype; 122e48354ceSNicholas Bellinger struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; 123e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 124e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 125e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 126e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 127e48354ceSNicholas Bellinger 128e48354ceSNicholas Bellinger initiatorname_param = iscsi_find_param_from_key( 129e48354ceSNicholas Bellinger INITIATORNAME, conn->param_list); 130e48354ceSNicholas Bellinger sessiontype_param = iscsi_find_param_from_key( 131e48354ceSNicholas Bellinger SESSIONTYPE, conn->param_list); 1321c5c12c6SRoland Dreier if (!initiatorname_param || !sessiontype_param) { 1331c5c12c6SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1341c5c12c6SRoland Dreier ISCSI_LOGIN_STATUS_MISSING_FIELDS); 135e48354ceSNicholas Bellinger return -1; 1361c5c12c6SRoland Dreier } 137e48354ceSNicholas Bellinger 138e48354ceSNicholas Bellinger sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 141e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 142e48354ceSNicholas Bellinger sess_list) { 143e48354ceSNicholas Bellinger 1448359cf43SJörn Engel sess_p = se_sess->fabric_sess_ptr; 145e48354ceSNicholas Bellinger spin_lock(&sess_p->conn_lock); 146e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 147e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 148e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 149e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 150e48354ceSNicholas Bellinger continue; 151e48354ceSNicholas Bellinger } 1528359cf43SJörn Engel if (!memcmp(sess_p->isid, conn->sess->isid, 6) && 1538359cf43SJörn Engel (!strcmp(sess_p->sess_ops->InitiatorName, 1548359cf43SJörn Engel initiatorname_param->value) && 155e48354ceSNicholas Bellinger (sess_p->sess_ops->SessionType == sessiontype))) { 156e48354ceSNicholas Bellinger atomic_set(&sess_p->session_reinstatement, 1); 157e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 158e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 159e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 160e48354ceSNicholas Bellinger sess = sess_p; 161e48354ceSNicholas Bellinger break; 162e48354ceSNicholas Bellinger } 163e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 164e48354ceSNicholas Bellinger } 165e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 166e48354ceSNicholas Bellinger /* 167e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 168e48354ceSNicholas Bellinger */ 169e48354ceSNicholas Bellinger if (!sess) 170e48354ceSNicholas Bellinger return 0; 171e48354ceSNicholas Bellinger 172e48354ceSNicholas Bellinger pr_debug("%s iSCSI Session SID %u is still active for %s," 173e48354ceSNicholas Bellinger " preforming session reinstatement.\n", (sessiontype) ? 174e48354ceSNicholas Bellinger "Discovery" : "Normal", sess->sid, 175e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 176e48354ceSNicholas Bellinger 177e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 178e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 179e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 180e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 18199367f01SNicholas Bellinger target_put_session(sess->se_sess); 18299367f01SNicholas Bellinger return 0; 183e48354ceSNicholas Bellinger } 184e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 185e48354ceSNicholas Bellinger 186e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 187e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 188e48354ceSNicholas Bellinger 18999367f01SNicholas Bellinger target_put_session(sess->se_sess); 19099367f01SNicholas Bellinger return 0; 191e48354ceSNicholas Bellinger } 192e48354ceSNicholas Bellinger 193e48354ceSNicholas Bellinger static void iscsi_login_set_conn_values( 194e48354ceSNicholas Bellinger struct iscsi_session *sess, 195e48354ceSNicholas Bellinger struct iscsi_conn *conn, 19650e5c87dSChristoph Hellwig __be16 cid) 197e48354ceSNicholas Bellinger { 198e48354ceSNicholas Bellinger conn->sess = sess; 19950e5c87dSChristoph Hellwig conn->cid = be16_to_cpu(cid); 200e48354ceSNicholas Bellinger /* 201e48354ceSNicholas Bellinger * Generate a random Status sequence number (statsn) for the new 202e48354ceSNicholas Bellinger * iSCSI connection. 203e48354ceSNicholas Bellinger */ 204e48354ceSNicholas Bellinger get_random_bytes(&conn->stat_sn, sizeof(u32)); 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger mutex_lock(&auth_id_lock); 207e48354ceSNicholas Bellinger conn->auth_id = iscsit_global->auth_id++; 208e48354ceSNicholas Bellinger mutex_unlock(&auth_id_lock); 209e48354ceSNicholas Bellinger } 210e48354ceSNicholas Bellinger 211e48354ceSNicholas Bellinger /* 212e48354ceSNicholas Bellinger * This is the leading connection of a new session, 213e48354ceSNicholas Bellinger * or session reinstatement. 214e48354ceSNicholas Bellinger */ 215e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s1( 216e48354ceSNicholas Bellinger struct iscsi_conn *conn, 217e48354ceSNicholas Bellinger unsigned char *buf) 218e48354ceSNicholas Bellinger { 219e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL; 220e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 22113b5533aSBenjamin Wang int ret; 222e48354ceSNicholas Bellinger 223e48354ceSNicholas Bellinger sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); 224e48354ceSNicholas Bellinger if (!sess) { 225e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 226e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 227e48354ceSNicholas Bellinger pr_err("Could not allocate memory for session\n"); 2280957627aSNicholas Bellinger return -ENOMEM; 229e48354ceSNicholas Bellinger } 230e48354ceSNicholas Bellinger 231e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 232e48354ceSNicholas Bellinger sess->init_task_tag = pdu->itt; 2338359cf43SJörn Engel memcpy(&sess->isid, pdu->isid, 6); 23450e5c87dSChristoph Hellwig sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); 235e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_conn_list); 236e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); 237e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_active_list); 238e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_inactive_list); 239e48354ceSNicholas Bellinger init_completion(&sess->async_msg_comp); 240e48354ceSNicholas Bellinger init_completion(&sess->reinstatement_comp); 241e48354ceSNicholas Bellinger init_completion(&sess->session_wait_comp); 242e48354ceSNicholas Bellinger init_completion(&sess->session_waiting_on_uc_comp); 243e48354ceSNicholas Bellinger mutex_init(&sess->cmdsn_mutex); 244e48354ceSNicholas Bellinger spin_lock_init(&sess->conn_lock); 245e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_a_lock); 246e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_i_lock); 247e48354ceSNicholas Bellinger spin_lock_init(&sess->session_usage_lock); 248e48354ceSNicholas Bellinger spin_lock_init(&sess->ttt_lock); 249e48354ceSNicholas Bellinger 250c9365bd0STejun Heo idr_preload(GFP_KERNEL); 251998866b0SRoland Dreier spin_lock_bh(&sess_idr_lock); 252c9365bd0STejun Heo ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); 253c9365bd0STejun Heo if (ret >= 0) 254c9365bd0STejun Heo sess->session_index = ret; 255998866b0SRoland Dreier spin_unlock_bh(&sess_idr_lock); 256c9365bd0STejun Heo idr_preload_end(); 257e48354ceSNicholas Bellinger 25813b5533aSBenjamin Wang if (ret < 0) { 259c9365bd0STejun Heo pr_err("idr_alloc() for sess_idr failed\n"); 26013b5533aSBenjamin Wang iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 26113b5533aSBenjamin Wang ISCSI_LOGIN_STATUS_NO_RESOURCES); 26213b5533aSBenjamin Wang kfree(sess); 26313b5533aSBenjamin Wang return -ENOMEM; 26413b5533aSBenjamin Wang } 26513b5533aSBenjamin Wang 266e48354ceSNicholas Bellinger sess->creation_time = get_jiffies_64(); 267e48354ceSNicholas Bellinger spin_lock_init(&sess->session_stats_lock); 268e48354ceSNicholas Bellinger /* 269e48354ceSNicholas Bellinger * The FFP CmdSN window values will be allocated from the TPG's 270e48354ceSNicholas Bellinger * Initiator Node's ACL once the login has been successfully completed. 271e48354ceSNicholas Bellinger */ 27250e5c87dSChristoph Hellwig sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn); 273e48354ceSNicholas Bellinger 274e48354ceSNicholas Bellinger sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); 275e48354ceSNicholas Bellinger if (!sess->sess_ops) { 276e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 277e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 278e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 279e48354ceSNicholas Bellinger " struct iscsi_sess_ops.\n"); 2800957627aSNicholas Bellinger kfree(sess); 2810957627aSNicholas Bellinger return -ENOMEM; 282e48354ceSNicholas Bellinger } 283e48354ceSNicholas Bellinger 284e48354ceSNicholas Bellinger sess->se_sess = transport_init_session(); 2850957627aSNicholas Bellinger if (IS_ERR(sess->se_sess)) { 286e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 287e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 2880957627aSNicholas Bellinger kfree(sess); 2890957627aSNicholas Bellinger return -ENOMEM; 290e48354ceSNicholas Bellinger } 291e48354ceSNicholas Bellinger 292e48354ceSNicholas Bellinger return 0; 293e48354ceSNicholas Bellinger } 294e48354ceSNicholas Bellinger 295e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s2( 296e48354ceSNicholas Bellinger struct iscsi_conn *conn) 297e48354ceSNicholas Bellinger { 298e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 299e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 300e48354ceSNicholas Bellinger unsigned char buf[32]; 301e48354ceSNicholas Bellinger 302e48354ceSNicholas Bellinger sess->tpg = conn->tpg; 303e48354ceSNicholas Bellinger 304e48354ceSNicholas Bellinger /* 305e48354ceSNicholas Bellinger * Assign a new TPG Session Handle. Note this is protected with 306e48354ceSNicholas Bellinger * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). 307e48354ceSNicholas Bellinger */ 308e48354ceSNicholas Bellinger sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; 309e48354ceSNicholas Bellinger if (!sess->tsih) 310e48354ceSNicholas Bellinger sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; 311e48354ceSNicholas Bellinger 312e48354ceSNicholas Bellinger /* 313e48354ceSNicholas Bellinger * Create the default params from user defined values.. 314e48354ceSNicholas Bellinger */ 315e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 316e48354ceSNicholas Bellinger ISCSI_TPG_C(conn)->param_list, 1) < 0) { 317e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 318e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 319e48354ceSNicholas Bellinger return -1; 320e48354ceSNicholas Bellinger } 321e48354ceSNicholas Bellinger 322e48354ceSNicholas Bellinger iscsi_set_keys_to_negotiate(0, conn->param_list); 323e48354ceSNicholas Bellinger 324e48354ceSNicholas Bellinger if (sess->sess_ops->SessionType) 325e48354ceSNicholas Bellinger return iscsi_set_keys_irrelevant_for_discovery( 326e48354ceSNicholas Bellinger conn->param_list); 327e48354ceSNicholas Bellinger 328e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 329e48354ceSNicholas Bellinger 330e48354ceSNicholas Bellinger /* 331e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 332e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 333e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 334e48354ceSNicholas Bellinger * 335e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 336e48354ceSNicholas Bellinger */ 337e48354ceSNicholas Bellinger memset(buf, 0, 32); 338e48354ceSNicholas Bellinger sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); 339e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 340e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 341e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 342e48354ceSNicholas Bellinger return -1; 343e48354ceSNicholas Bellinger } 344e48354ceSNicholas Bellinger 345e48354ceSNicholas Bellinger /* 346e48354ceSNicholas Bellinger * Workaround for Initiators that have broken connection recovery logic. 347e48354ceSNicholas Bellinger * 348e48354ceSNicholas Bellinger * "We would really like to get rid of this." Linux-iSCSI.org team 349e48354ceSNicholas Bellinger */ 350e48354ceSNicholas Bellinger memset(buf, 0, 32); 351e48354ceSNicholas Bellinger sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl); 352e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 353e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 354e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 355e48354ceSNicholas Bellinger return -1; 356e48354ceSNicholas Bellinger } 357e48354ceSNicholas Bellinger 358e48354ceSNicholas Bellinger if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0) 359e48354ceSNicholas Bellinger return -1; 360e48354ceSNicholas Bellinger 361e48354ceSNicholas Bellinger return 0; 362e48354ceSNicholas Bellinger } 363e48354ceSNicholas Bellinger 364e48354ceSNicholas Bellinger /* 365e48354ceSNicholas Bellinger * Remove PSTATE_NEGOTIATE for the four FIM related keys. 366e48354ceSNicholas Bellinger * The Initiator node will be able to enable FIM by proposing them itself. 367e48354ceSNicholas Bellinger */ 368e48354ceSNicholas Bellinger int iscsi_login_disable_FIM_keys( 369e48354ceSNicholas Bellinger struct iscsi_param_list *param_list, 370e48354ceSNicholas Bellinger struct iscsi_conn *conn) 371e48354ceSNicholas Bellinger { 372e48354ceSNicholas Bellinger struct iscsi_param *param; 373e48354ceSNicholas Bellinger 374e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarker", param_list); 375e48354ceSNicholas Bellinger if (!param) { 376e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 377e48354ceSNicholas Bellinger " OFMarker failed\n"); 378e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 379e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 380e48354ceSNicholas Bellinger return -1; 381e48354ceSNicholas Bellinger } 382e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 383e48354ceSNicholas Bellinger 384e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("OFMarkInt", param_list); 385e48354ceSNicholas Bellinger if (!param) { 386e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 387e48354ceSNicholas Bellinger " IFMarker failed\n"); 388e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 389e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 390e48354ceSNicholas Bellinger return -1; 391e48354ceSNicholas Bellinger } 392e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 393e48354ceSNicholas Bellinger 394e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarker", param_list); 395e48354ceSNicholas Bellinger if (!param) { 396e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 397e48354ceSNicholas Bellinger " IFMarker failed\n"); 398e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 399e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 400e48354ceSNicholas Bellinger return -1; 401e48354ceSNicholas Bellinger } 402e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 403e48354ceSNicholas Bellinger 404e48354ceSNicholas Bellinger param = iscsi_find_param_from_key("IFMarkInt", param_list); 405e48354ceSNicholas Bellinger if (!param) { 406e48354ceSNicholas Bellinger pr_err("iscsi_find_param_from_key() for" 407e48354ceSNicholas Bellinger " IFMarker failed\n"); 408e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 409e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 410e48354ceSNicholas Bellinger return -1; 411e48354ceSNicholas Bellinger } 412e48354ceSNicholas Bellinger param->state &= ~PSTATE_NEGOTIATE; 413e48354ceSNicholas Bellinger 414e48354ceSNicholas Bellinger return 0; 415e48354ceSNicholas Bellinger } 416e48354ceSNicholas Bellinger 417e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s1( 418e48354ceSNicholas Bellinger struct iscsi_conn *conn, 419e48354ceSNicholas Bellinger unsigned char *buf) 420e48354ceSNicholas Bellinger { 421e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 422e48354ceSNicholas Bellinger 423e48354ceSNicholas Bellinger iscsi_login_set_conn_values(NULL, conn, pdu->cid); 424e48354ceSNicholas Bellinger return 0; 425e48354ceSNicholas Bellinger } 426e48354ceSNicholas Bellinger 427e48354ceSNicholas Bellinger /* 428e48354ceSNicholas Bellinger * Add a new connection to an existing session. 429e48354ceSNicholas Bellinger */ 430e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s2( 431e48354ceSNicholas Bellinger struct iscsi_conn *conn, 432e48354ceSNicholas Bellinger unsigned char *buf) 433e48354ceSNicholas Bellinger { 434e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 435e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 436e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 437e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 438e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 439e48354ceSNicholas Bellinger 440e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 441e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 442e48354ceSNicholas Bellinger sess_list) { 443e48354ceSNicholas Bellinger 444e48354ceSNicholas Bellinger sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; 445e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 446e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 447e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) 448e48354ceSNicholas Bellinger continue; 4498359cf43SJörn Engel if (!memcmp(sess_p->isid, pdu->isid, 6) && 45050e5c87dSChristoph Hellwig (sess_p->tsih == be16_to_cpu(pdu->tsih))) { 451e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 452e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 453e48354ceSNicholas Bellinger sess = sess_p; 454e48354ceSNicholas Bellinger break; 455e48354ceSNicholas Bellinger } 456e48354ceSNicholas Bellinger } 457e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 458e48354ceSNicholas Bellinger 459e48354ceSNicholas Bellinger /* 460e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 461e48354ceSNicholas Bellinger */ 462e48354ceSNicholas Bellinger if (!sess) { 463e48354ceSNicholas Bellinger pr_err("Initiator attempting to add a connection to" 464e48354ceSNicholas Bellinger " a non-existent session, rejecting iSCSI Login.\n"); 465e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 466e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_SESSION); 467e48354ceSNicholas Bellinger return -1; 468e48354ceSNicholas Bellinger } 469e48354ceSNicholas Bellinger 470e48354ceSNicholas Bellinger /* 471e48354ceSNicholas Bellinger * Stop the Time2Retain timer if this is a failed session, we restart 472e48354ceSNicholas Bellinger * the timer if the login is not successful. 473e48354ceSNicholas Bellinger */ 474e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 475e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) 476e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 1); 477e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 478e48354ceSNicholas Bellinger 479e48354ceSNicholas Bellinger iscsi_login_set_conn_values(sess, conn, pdu->cid); 480e48354ceSNicholas Bellinger 481e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 482e48354ceSNicholas Bellinger ISCSI_TPG_C(conn)->param_list, 0) < 0) { 483e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 484e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 485e48354ceSNicholas Bellinger return -1; 486e48354ceSNicholas Bellinger } 487e48354ceSNicholas Bellinger 488e48354ceSNicholas Bellinger iscsi_set_keys_to_negotiate(0, conn->param_list); 489e48354ceSNicholas Bellinger /* 490e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 491e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 492e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 493e48354ceSNicholas Bellinger * 494e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 495e48354ceSNicholas Bellinger */ 496e48354ceSNicholas Bellinger memset(buf, 0, 32); 497e48354ceSNicholas Bellinger sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); 498e48354ceSNicholas Bellinger if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 499e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 500e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 501e48354ceSNicholas Bellinger return -1; 502e48354ceSNicholas Bellinger } 503e48354ceSNicholas Bellinger 504e48354ceSNicholas Bellinger return iscsi_login_disable_FIM_keys(conn->param_list, conn); 505e48354ceSNicholas Bellinger } 506e48354ceSNicholas Bellinger 507e48354ceSNicholas Bellinger int iscsi_login_post_auth_non_zero_tsih( 508e48354ceSNicholas Bellinger struct iscsi_conn *conn, 509e48354ceSNicholas Bellinger u16 cid, 510e48354ceSNicholas Bellinger u32 exp_statsn) 511e48354ceSNicholas Bellinger { 512e48354ceSNicholas Bellinger struct iscsi_conn *conn_ptr = NULL; 513e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 514e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 515e48354ceSNicholas Bellinger 516e48354ceSNicholas Bellinger /* 517e48354ceSNicholas Bellinger * By following item 5 in the login table, if we have found 518e48354ceSNicholas Bellinger * an existing ISID and a valid/existing TSIH and an existing 519e48354ceSNicholas Bellinger * CID we do connection reinstatement. Currently we dont not 520e48354ceSNicholas Bellinger * support it so we send back an non-zero status class to the 521e48354ceSNicholas Bellinger * initiator and release the new connection. 522e48354ceSNicholas Bellinger */ 523e48354ceSNicholas Bellinger conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); 524ee1b1b9cSAndy Grover if (conn_ptr) { 525e48354ceSNicholas Bellinger pr_err("Connection exists with CID %hu for %s," 526e48354ceSNicholas Bellinger " performing connection reinstatement.\n", 527e48354ceSNicholas Bellinger conn_ptr->cid, sess->sess_ops->InitiatorName); 528e48354ceSNicholas Bellinger 529e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(conn_ptr); 530e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_ptr); 531e48354ceSNicholas Bellinger } 532e48354ceSNicholas Bellinger 533e48354ceSNicholas Bellinger /* 534e48354ceSNicholas Bellinger * Check for any connection recovery entires containing CID. 535e48354ceSNicholas Bellinger * We use the original ExpStatSN sent in the first login request 536e48354ceSNicholas Bellinger * to acknowledge commands for the failed connection. 537e48354ceSNicholas Bellinger * 538e48354ceSNicholas Bellinger * Also note that an explict logout may have already been sent, 539e48354ceSNicholas Bellinger * but the response may not be sent due to additional connection 540e48354ceSNicholas Bellinger * loss. 541e48354ceSNicholas Bellinger */ 542e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) { 543e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 544e48354ceSNicholas Bellinger sess, cid); 545ee1b1b9cSAndy Grover if (cr) { 546e48354ceSNicholas Bellinger pr_debug("Performing implicit logout" 547e48354ceSNicholas Bellinger " for connection recovery on CID: %hu\n", 548e48354ceSNicholas Bellinger conn->cid); 549e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); 550e48354ceSNicholas Bellinger } 551e48354ceSNicholas Bellinger } 552e48354ceSNicholas Bellinger 553e48354ceSNicholas Bellinger /* 554e48354ceSNicholas Bellinger * Else we follow item 4 from the login table in that we have 555e48354ceSNicholas Bellinger * found an existing ISID and a valid/existing TSIH and a new 556e48354ceSNicholas Bellinger * CID we go ahead and continue to add a new connection to the 557e48354ceSNicholas Bellinger * session. 558e48354ceSNicholas Bellinger */ 559e48354ceSNicholas Bellinger pr_debug("Adding CID %hu to existing session for %s.\n", 560e48354ceSNicholas Bellinger cid, sess->sess_ops->InitiatorName); 561e48354ceSNicholas Bellinger 562e48354ceSNicholas Bellinger if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { 563e48354ceSNicholas Bellinger pr_err("Adding additional connection to this session" 564e48354ceSNicholas Bellinger " would exceed MaxConnections %d, login failed.\n", 565e48354ceSNicholas Bellinger sess->sess_ops->MaxConnections); 566e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 567e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ISID_ERROR); 568e48354ceSNicholas Bellinger return -1; 569e48354ceSNicholas Bellinger } 570e48354ceSNicholas Bellinger 571e48354ceSNicholas Bellinger return 0; 572e48354ceSNicholas Bellinger } 573e48354ceSNicholas Bellinger 574e48354ceSNicholas Bellinger static void iscsi_post_login_start_timers(struct iscsi_conn *conn) 575e48354ceSNicholas Bellinger { 576e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 577e48354ceSNicholas Bellinger 578e48354ceSNicholas Bellinger if (!sess->sess_ops->SessionType) 579e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 580e48354ceSNicholas Bellinger } 581e48354ceSNicholas Bellinger 582e48354ceSNicholas Bellinger static int iscsi_post_login_handler( 583e48354ceSNicholas Bellinger struct iscsi_np *np, 584e48354ceSNicholas Bellinger struct iscsi_conn *conn, 585e48354ceSNicholas Bellinger u8 zero_tsih) 586e48354ceSNicholas Bellinger { 587e48354ceSNicholas Bellinger int stop_timer = 0; 588e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 589e48354ceSNicholas Bellinger struct se_session *se_sess = sess->se_sess; 590e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); 591e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 592e48354ceSNicholas Bellinger struct iscsi_thread_set *ts; 593e48354ceSNicholas Bellinger 594e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 595e48354ceSNicholas Bellinger 596e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, 597e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ACCEPT); 598e48354ceSNicholas Bellinger 599e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); 600e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_LOGGED_IN; 601e48354ceSNicholas Bellinger 602e48354ceSNicholas Bellinger iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); 603e48354ceSNicholas Bellinger iscsit_set_sync_and_steering_values(conn); 604e48354ceSNicholas Bellinger /* 605e48354ceSNicholas Bellinger * SCSI Initiator -> SCSI Target Port Mapping 606e48354ceSNicholas Bellinger */ 607e48354ceSNicholas Bellinger ts = iscsi_get_thread_set(); 608e48354ceSNicholas Bellinger if (!zero_tsih) { 609e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, 610e48354ceSNicholas Bellinger conn->param_list, 0); 611e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 612e48354ceSNicholas Bellinger conn->param_list = NULL; 613e48354ceSNicholas Bellinger 614e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 615e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 0); 616e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 617e48354ceSNicholas Bellinger pr_debug("Moving to" 618e48354ceSNicholas Bellinger " TARG_SESS_STATE_LOGGED_IN.\n"); 619e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 620e48354ceSNicholas Bellinger stop_timer = 1; 621e48354ceSNicholas Bellinger } 622e48354ceSNicholas Bellinger 623e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to" 6242f9bc894SNicholas Bellinger " %s:%hu,%hu\n", conn->cid, conn->login_ip, 6252f9bc894SNicholas Bellinger conn->local_ip, conn->local_port, tpg->tpgt); 626e48354ceSNicholas Bellinger 627e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 628e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 629e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu" 630e48354ceSNicholas Bellinger " from node: %s\n", atomic_read(&sess->nconn), 631e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 632e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 633e48354ceSNicholas Bellinger 634e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 635e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 636e48354ceSNicholas Bellinger /* 637e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 638e48354ceSNicholas Bellinger * are scheduled on the same CPU. 639e48354ceSNicholas Bellinger */ 640e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 641e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 642e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 643e48354ceSNicholas Bellinger 644e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 645e48354ceSNicholas Bellinger if (stop_timer) { 646e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 647e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 648e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 649e48354ceSNicholas Bellinger } 650e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 651e48354ceSNicholas Bellinger return 0; 652e48354ceSNicholas Bellinger } 653e48354ceSNicholas Bellinger 654e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); 655e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 656e48354ceSNicholas Bellinger conn->param_list = NULL; 657e48354ceSNicholas Bellinger 658e48354ceSNicholas Bellinger iscsit_determine_maxcmdsn(sess); 659e48354ceSNicholas Bellinger 660e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 661e48354ceSNicholas Bellinger __transport_register_session(&sess->tpg->tpg_se_tpg, 6628359cf43SJörn Engel se_sess->se_node_acl, se_sess, sess); 663e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); 664e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 665e48354ceSNicholas Bellinger 666e48354ceSNicholas Bellinger pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n", 6672f9bc894SNicholas Bellinger conn->cid, conn->login_ip, conn->local_ip, conn->local_port, 6682f9bc894SNicholas Bellinger tpg->tpgt); 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 671e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 672e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 673e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu from node:" 674e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 675e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 676e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 677e48354ceSNicholas Bellinger 678e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 679e48354ceSNicholas Bellinger if (!sess->sid) 680e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 681e48354ceSNicholas Bellinger pr_debug("Established iSCSI session from node: %s\n", 682e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 683e48354ceSNicholas Bellinger 684e48354ceSNicholas Bellinger tpg->nsessions++; 685e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 686e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions++; 687e48354ceSNicholas Bellinger 688e48354ceSNicholas Bellinger pr_debug("Incremented number of active iSCSI sessions to %u on" 689e48354ceSNicholas Bellinger " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); 690e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 691e48354ceSNicholas Bellinger 692e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 693e48354ceSNicholas Bellinger iscsi_activate_thread_set(conn, ts); 694e48354ceSNicholas Bellinger /* 695e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 696e48354ceSNicholas Bellinger * are scheduled on the same CPU. 697e48354ceSNicholas Bellinger */ 698e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 699e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 700e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 701e48354ceSNicholas Bellinger 702e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 703e48354ceSNicholas Bellinger 704e48354ceSNicholas Bellinger return 0; 705e48354ceSNicholas Bellinger } 706e48354ceSNicholas Bellinger 707e48354ceSNicholas Bellinger static void iscsi_handle_login_thread_timeout(unsigned long data) 708e48354ceSNicholas Bellinger { 709e48354ceSNicholas Bellinger struct iscsi_np *np = (struct iscsi_np *) data; 710e48354ceSNicholas Bellinger 711e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 712e48354ceSNicholas Bellinger pr_err("iSCSI Login timeout on Network Portal %s:%hu\n", 713e48354ceSNicholas Bellinger np->np_ip, np->np_port); 714e48354ceSNicholas Bellinger 715e48354ceSNicholas Bellinger if (np->np_login_timer_flags & ISCSI_TF_STOP) { 716e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 717e48354ceSNicholas Bellinger return; 718e48354ceSNicholas Bellinger } 719e48354ceSNicholas Bellinger 720e48354ceSNicholas Bellinger if (np->np_thread) 721e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 722e48354ceSNicholas Bellinger 723e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 724e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 725e48354ceSNicholas Bellinger } 726e48354ceSNicholas Bellinger 727e48354ceSNicholas Bellinger static void iscsi_start_login_thread_timer(struct iscsi_np *np) 728e48354ceSNicholas Bellinger { 729e48354ceSNicholas Bellinger /* 730e48354ceSNicholas Bellinger * This used the TA_LOGIN_TIMEOUT constant because at this 731e48354ceSNicholas Bellinger * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout 732e48354ceSNicholas Bellinger */ 733e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 734e48354ceSNicholas Bellinger init_timer(&np->np_login_timer); 735e48354ceSNicholas Bellinger np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); 736e48354ceSNicholas Bellinger np->np_login_timer.data = (unsigned long)np; 737e48354ceSNicholas Bellinger np->np_login_timer.function = iscsi_handle_login_thread_timeout; 738e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_STOP; 739e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_RUNNING; 740e48354ceSNicholas Bellinger add_timer(&np->np_login_timer); 741e48354ceSNicholas Bellinger 742e48354ceSNicholas Bellinger pr_debug("Added timeout timer to iSCSI login request for" 743e48354ceSNicholas Bellinger " %u seconds.\n", TA_LOGIN_TIMEOUT); 744e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 745e48354ceSNicholas Bellinger } 746e48354ceSNicholas Bellinger 747e48354ceSNicholas Bellinger static void iscsi_stop_login_thread_timer(struct iscsi_np *np) 748e48354ceSNicholas Bellinger { 749e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 750e48354ceSNicholas Bellinger if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { 751e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 752e48354ceSNicholas Bellinger return; 753e48354ceSNicholas Bellinger } 754e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_STOP; 755e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 756e48354ceSNicholas Bellinger 757e48354ceSNicholas Bellinger del_timer_sync(&np->np_login_timer); 758e48354ceSNicholas Bellinger 759e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 760e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 761e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 762e48354ceSNicholas Bellinger } 763e48354ceSNicholas Bellinger 764e48354ceSNicholas Bellinger int iscsi_target_setup_login_socket( 765e48354ceSNicholas Bellinger struct iscsi_np *np, 766e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr) 767e48354ceSNicholas Bellinger { 768e48354ceSNicholas Bellinger struct socket *sock; 769e48354ceSNicholas Bellinger int backlog = 5, ret, opt = 0, len; 770e48354ceSNicholas Bellinger 771e48354ceSNicholas Bellinger switch (np->np_network_transport) { 772e48354ceSNicholas Bellinger case ISCSI_TCP: 773e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 774e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 775e48354ceSNicholas Bellinger break; 776e48354ceSNicholas Bellinger case ISCSI_SCTP_TCP: 777e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 778e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 779e48354ceSNicholas Bellinger break; 780e48354ceSNicholas Bellinger case ISCSI_SCTP_UDP: 781e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 782e48354ceSNicholas Bellinger np->np_sock_type = SOCK_SEQPACKET; 783e48354ceSNicholas Bellinger break; 784e48354ceSNicholas Bellinger case ISCSI_IWARP_TCP: 785e48354ceSNicholas Bellinger case ISCSI_IWARP_SCTP: 786e48354ceSNicholas Bellinger case ISCSI_INFINIBAND: 787e48354ceSNicholas Bellinger default: 788e48354ceSNicholas Bellinger pr_err("Unsupported network_transport: %d\n", 789e48354ceSNicholas Bellinger np->np_network_transport); 790e48354ceSNicholas Bellinger return -EINVAL; 791e48354ceSNicholas Bellinger } 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger ret = sock_create(sockaddr->ss_family, np->np_sock_type, 794e48354ceSNicholas Bellinger np->np_ip_proto, &sock); 795e48354ceSNicholas Bellinger if (ret < 0) { 796e48354ceSNicholas Bellinger pr_err("sock_create() failed.\n"); 797e48354ceSNicholas Bellinger return ret; 798e48354ceSNicholas Bellinger } 799e48354ceSNicholas Bellinger np->np_socket = sock; 800e48354ceSNicholas Bellinger /* 801e48354ceSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 802e48354ceSNicholas Bellinger * in iscsi_target_configfs.c code.. 803e48354ceSNicholas Bellinger */ 8048359cf43SJörn Engel memcpy(&np->np_sockaddr, sockaddr, 805e48354ceSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 806e48354ceSNicholas Bellinger 807e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) 808e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in6); 809e48354ceSNicholas Bellinger else 810e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in); 811e48354ceSNicholas Bellinger /* 812e48354ceSNicholas Bellinger * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. 813e48354ceSNicholas Bellinger */ 8148359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 815e48354ceSNicholas Bellinger opt = 1; 816e48354ceSNicholas Bellinger if (np->np_network_transport == ISCSI_TCP) { 817e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, 818e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 819e48354ceSNicholas Bellinger if (ret < 0) { 820e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for TCP_NODELAY" 821e48354ceSNicholas Bellinger " failed: %d\n", ret); 822e48354ceSNicholas Bellinger goto fail; 823e48354ceSNicholas Bellinger } 824e48354ceSNicholas Bellinger } 825e48354ceSNicholas Bellinger 8268359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 827e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, 828e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 829e48354ceSNicholas Bellinger if (ret < 0) { 830e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for SO_REUSEADDR" 831e48354ceSNicholas Bellinger " failed\n"); 832e48354ceSNicholas Bellinger goto fail; 833e48354ceSNicholas Bellinger } 834e48354ceSNicholas Bellinger 8359f9ef6d3SDax Kelson ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, 8369f9ef6d3SDax Kelson (char *)&opt, sizeof(opt)); 8379f9ef6d3SDax Kelson if (ret < 0) { 8389f9ef6d3SDax Kelson pr_err("kernel_setsockopt() for IP_FREEBIND" 8399f9ef6d3SDax Kelson " failed\n"); 8409f9ef6d3SDax Kelson goto fail; 8419f9ef6d3SDax Kelson } 8429f9ef6d3SDax Kelson 843e48354ceSNicholas Bellinger ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); 844e48354ceSNicholas Bellinger if (ret < 0) { 845e48354ceSNicholas Bellinger pr_err("kernel_bind() failed: %d\n", ret); 846e48354ceSNicholas Bellinger goto fail; 847e48354ceSNicholas Bellinger } 848e48354ceSNicholas Bellinger 849e48354ceSNicholas Bellinger ret = kernel_listen(sock, backlog); 850e48354ceSNicholas Bellinger if (ret != 0) { 851e48354ceSNicholas Bellinger pr_err("kernel_listen() failed: %d\n", ret); 852e48354ceSNicholas Bellinger goto fail; 853e48354ceSNicholas Bellinger } 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger return 0; 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger fail: 858e48354ceSNicholas Bellinger np->np_socket = NULL; 859bf6932f4SAl Viro if (sock) 860e48354ceSNicholas Bellinger sock_release(sock); 861e48354ceSNicholas Bellinger return ret; 862e48354ceSNicholas Bellinger } 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger static int __iscsi_target_login_thread(struct iscsi_np *np) 865e48354ceSNicholas Bellinger { 866e48354ceSNicholas Bellinger u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0; 867bf6932f4SAl Viro int err, ret = 0, stop; 868e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 869e48354ceSNicholas Bellinger struct iscsi_login *login; 870e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = NULL; 871e48354ceSNicholas Bellinger struct socket *new_sock, *sock; 872e48354ceSNicholas Bellinger struct kvec iov; 873e48354ceSNicholas Bellinger struct iscsi_login_req *pdu; 874e48354ceSNicholas Bellinger struct sockaddr_in sock_in; 875e48354ceSNicholas Bellinger struct sockaddr_in6 sock_in6; 876e48354ceSNicholas Bellinger 877e48354ceSNicholas Bellinger flush_signals(current); 878e48354ceSNicholas Bellinger sock = np->np_socket; 879e48354ceSNicholas Bellinger 880e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 881e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 882e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 883e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 884e48354ceSNicholas Bellinger } else { 885e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 888e48354ceSNicholas Bellinger 889e48354ceSNicholas Bellinger if (kernel_accept(sock, &new_sock, 0) < 0) { 890e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 891e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 892e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 893e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 894e48354ceSNicholas Bellinger /* Get another socket */ 895e48354ceSNicholas Bellinger return 1; 896e48354ceSNicholas Bellinger } 897e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 898e48354ceSNicholas Bellinger goto out; 899e48354ceSNicholas Bellinger } 900e48354ceSNicholas Bellinger iscsi_start_login_thread_timer(np); 901e48354ceSNicholas Bellinger 902e48354ceSNicholas Bellinger conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); 903e48354ceSNicholas Bellinger if (!conn) { 904e48354ceSNicholas Bellinger pr_err("Could not allocate memory for" 905e48354ceSNicholas Bellinger " new connection\n"); 906e48354ceSNicholas Bellinger sock_release(new_sock); 907e48354ceSNicholas Bellinger /* Get another socket */ 908e48354ceSNicholas Bellinger return 1; 909e48354ceSNicholas Bellinger } 910e48354ceSNicholas Bellinger 911e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 912e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 913e48354ceSNicholas Bellinger conn->sock = new_sock; 914e48354ceSNicholas Bellinger 915e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); 916e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_XPT_UP; 917e48354ceSNicholas Bellinger 918e48354ceSNicholas Bellinger /* 919e48354ceSNicholas Bellinger * Allocate conn->conn_ops early as a failure calling 920e48354ceSNicholas Bellinger * iscsit_tx_login_rsp() below will call tx_data(). 921e48354ceSNicholas Bellinger */ 922e48354ceSNicholas Bellinger conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); 923e48354ceSNicholas Bellinger if (!conn->conn_ops) { 924e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 925e48354ceSNicholas Bellinger " struct iscsi_conn_ops.\n"); 926e48354ceSNicholas Bellinger goto new_sess_out; 927e48354ceSNicholas Bellinger } 928e48354ceSNicholas Bellinger /* 929e48354ceSNicholas Bellinger * Perform the remaining iSCSI connection initialization items.. 930e48354ceSNicholas Bellinger */ 931e48354ceSNicholas Bellinger if (iscsi_login_init_conn(conn) < 0) 932e48354ceSNicholas Bellinger goto new_sess_out; 933e48354ceSNicholas Bellinger 934e48354ceSNicholas Bellinger memset(buffer, 0, ISCSI_HDR_LEN); 935e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 936e48354ceSNicholas Bellinger iov.iov_base = buffer; 937e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 938e48354ceSNicholas Bellinger 939e48354ceSNicholas Bellinger if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) { 940e48354ceSNicholas Bellinger pr_err("rx_data() returned an error.\n"); 941e48354ceSNicholas Bellinger goto new_sess_out; 942e48354ceSNicholas Bellinger } 943e48354ceSNicholas Bellinger 944e48354ceSNicholas Bellinger iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK); 945e48354ceSNicholas Bellinger if (!(iscsi_opcode & ISCSI_OP_LOGIN)) { 946e48354ceSNicholas Bellinger pr_err("First opcode is not login request," 947e48354ceSNicholas Bellinger " failing login request.\n"); 948e48354ceSNicholas Bellinger goto new_sess_out; 949e48354ceSNicholas Bellinger } 950e48354ceSNicholas Bellinger 951e48354ceSNicholas Bellinger pdu = (struct iscsi_login_req *) buffer; 95266c7db68SChristoph Hellwig 953e48354ceSNicholas Bellinger /* 954e48354ceSNicholas Bellinger * Used by iscsit_tx_login_rsp() for Login Resonses PDUs 955e48354ceSNicholas Bellinger * when Status-Class != 0. 956e48354ceSNicholas Bellinger */ 957e48354ceSNicholas Bellinger conn->login_itt = pdu->itt; 958e48354ceSNicholas Bellinger 959e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 960e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 961e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 962e48354ceSNicholas Bellinger pr_err("iSCSI Network Portal on %s:%hu currently not" 963e48354ceSNicholas Bellinger " active.\n", np->np_ip, np->np_port); 964e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 965e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 966e48354ceSNicholas Bellinger goto new_sess_out; 967e48354ceSNicholas Bellinger } 968e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 969e48354ceSNicholas Bellinger 970e48354ceSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 971e48354ceSNicholas Bellinger memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); 972e48354ceSNicholas Bellinger 973e48354ceSNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 974e48354ceSNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 1) < 0) { 975e48354ceSNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 976e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 977e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 978e48354ceSNicholas Bellinger goto new_sess_out; 979e48354ceSNicholas Bellinger } 9806626a057SChris Boot snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", 9816626a057SChris Boot &sock_in6.sin6_addr.in6_u); 9826626a057SChris Boot conn->login_port = ntohs(sock_in6.sin6_port); 9832f9bc894SNicholas Bellinger 9842f9bc894SNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 9852f9bc894SNicholas Bellinger (struct sockaddr *)&sock_in6, &err, 0) < 0) { 9862f9bc894SNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 9872f9bc894SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 9882f9bc894SNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 9892f9bc894SNicholas Bellinger goto new_sess_out; 9902f9bc894SNicholas Bellinger } 9912f9bc894SNicholas Bellinger snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", 9922f9bc894SNicholas Bellinger &sock_in6.sin6_addr.in6_u); 9932f9bc894SNicholas Bellinger conn->local_port = ntohs(sock_in6.sin6_port); 9942f9bc894SNicholas Bellinger 995e48354ceSNicholas Bellinger } else { 996e48354ceSNicholas Bellinger memset(&sock_in, 0, sizeof(struct sockaddr_in)); 997e48354ceSNicholas Bellinger 998e48354ceSNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 999e48354ceSNicholas Bellinger (struct sockaddr *)&sock_in, &err, 1) < 0) { 1000e48354ceSNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 1001e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1002e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 1003e48354ceSNicholas Bellinger goto new_sess_out; 1004e48354ceSNicholas Bellinger } 1005e48354ceSNicholas Bellinger sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr); 1006e48354ceSNicholas Bellinger conn->login_port = ntohs(sock_in.sin_port); 10072f9bc894SNicholas Bellinger 10082f9bc894SNicholas Bellinger if (conn->sock->ops->getname(conn->sock, 10092f9bc894SNicholas Bellinger (struct sockaddr *)&sock_in, &err, 0) < 0) { 10102f9bc894SNicholas Bellinger pr_err("sock_ops->getname() failed.\n"); 10112f9bc894SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 10122f9bc894SNicholas Bellinger ISCSI_LOGIN_STATUS_TARGET_ERROR); 10132f9bc894SNicholas Bellinger goto new_sess_out; 10142f9bc894SNicholas Bellinger } 10152f9bc894SNicholas Bellinger sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr); 10162f9bc894SNicholas Bellinger conn->local_port = ntohs(sock_in.sin_port); 1017e48354ceSNicholas Bellinger } 1018e48354ceSNicholas Bellinger 1019e48354ceSNicholas Bellinger conn->network_transport = np->np_network_transport; 1020e48354ceSNicholas Bellinger 1021e48354ceSNicholas Bellinger pr_debug("Received iSCSI login request from %s on %s Network" 1022e48354ceSNicholas Bellinger " Portal %s:%hu\n", conn->login_ip, 1023e48354ceSNicholas Bellinger (conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP", 10242f9bc894SNicholas Bellinger conn->local_ip, conn->local_port); 1025e48354ceSNicholas Bellinger 1026e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); 1027e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGIN; 1028e48354ceSNicholas Bellinger 1029e48354ceSNicholas Bellinger if (iscsi_login_check_initiator_version(conn, pdu->max_version, 1030e48354ceSNicholas Bellinger pdu->min_version) < 0) 1031e48354ceSNicholas Bellinger goto new_sess_out; 1032e48354ceSNicholas Bellinger 1033e48354ceSNicholas Bellinger zero_tsih = (pdu->tsih == 0x0000); 1034ee1b1b9cSAndy Grover if (zero_tsih) { 1035e48354ceSNicholas Bellinger /* 1036e48354ceSNicholas Bellinger * This is the leading connection of a new session. 1037e48354ceSNicholas Bellinger * We wait until after authentication to check for 1038e48354ceSNicholas Bellinger * session reinstatement. 1039e48354ceSNicholas Bellinger */ 1040e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) 1041e48354ceSNicholas Bellinger goto new_sess_out; 1042e48354ceSNicholas Bellinger } else { 1043e48354ceSNicholas Bellinger /* 1044e48354ceSNicholas Bellinger * Add a new connection to an existing session. 1045e48354ceSNicholas Bellinger * We check for a non-existant session in 1046e48354ceSNicholas Bellinger * iscsi_login_non_zero_tsih_s2() below based 1047e48354ceSNicholas Bellinger * on ISID/TSIH, but wait until after authentication 1048e48354ceSNicholas Bellinger * to check for connection reinstatement, etc. 1049e48354ceSNicholas Bellinger */ 1050e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) 1051e48354ceSNicholas Bellinger goto new_sess_out; 1052e48354ceSNicholas Bellinger } 1053e48354ceSNicholas Bellinger 1054e48354ceSNicholas Bellinger /* 1055e48354ceSNicholas Bellinger * This will process the first login request, and call 1056e48354ceSNicholas Bellinger * iscsi_target_locate_portal(), and return a valid struct iscsi_login. 1057e48354ceSNicholas Bellinger */ 1058e48354ceSNicholas Bellinger login = iscsi_target_init_negotiation(np, conn, buffer); 1059e48354ceSNicholas Bellinger if (!login) { 1060e48354ceSNicholas Bellinger tpg = conn->tpg; 1061e48354ceSNicholas Bellinger goto new_sess_out; 1062e48354ceSNicholas Bellinger } 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger tpg = conn->tpg; 1065e48354ceSNicholas Bellinger if (!tpg) { 1066e48354ceSNicholas Bellinger pr_err("Unable to locate struct iscsi_conn->tpg\n"); 1067e48354ceSNicholas Bellinger goto new_sess_out; 1068e48354ceSNicholas Bellinger } 1069e48354ceSNicholas Bellinger 1070e48354ceSNicholas Bellinger if (zero_tsih) { 1071e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s2(conn) < 0) { 1072e48354ceSNicholas Bellinger iscsi_target_nego_release(login, conn); 1073e48354ceSNicholas Bellinger goto new_sess_out; 1074e48354ceSNicholas Bellinger } 1075e48354ceSNicholas Bellinger } else { 1076e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) { 1077e48354ceSNicholas Bellinger iscsi_target_nego_release(login, conn); 1078e48354ceSNicholas Bellinger goto old_sess_out; 1079e48354ceSNicholas Bellinger } 1080e48354ceSNicholas Bellinger } 1081e48354ceSNicholas Bellinger 1082e48354ceSNicholas Bellinger if (iscsi_target_start_negotiation(login, conn) < 0) 1083e48354ceSNicholas Bellinger goto new_sess_out; 1084e48354ceSNicholas Bellinger 1085e48354ceSNicholas Bellinger if (!conn->sess) { 1086e48354ceSNicholas Bellinger pr_err("struct iscsi_conn session pointer is NULL!\n"); 1087e48354ceSNicholas Bellinger goto new_sess_out; 1088e48354ceSNicholas Bellinger } 1089e48354ceSNicholas Bellinger 1090e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1091e48354ceSNicholas Bellinger 1092e48354ceSNicholas Bellinger if (signal_pending(current)) 1093e48354ceSNicholas Bellinger goto new_sess_out; 1094e48354ceSNicholas Bellinger 1095e48354ceSNicholas Bellinger ret = iscsi_post_login_handler(np, conn, zero_tsih); 1096e48354ceSNicholas Bellinger 1097e48354ceSNicholas Bellinger if (ret < 0) 1098e48354ceSNicholas Bellinger goto new_sess_out; 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger iscsit_deaccess_np(np, tpg); 1101e48354ceSNicholas Bellinger tpg = NULL; 1102e48354ceSNicholas Bellinger /* Get another socket */ 1103e48354ceSNicholas Bellinger return 1; 1104e48354ceSNicholas Bellinger 1105e48354ceSNicholas Bellinger new_sess_out: 1106e48354ceSNicholas Bellinger pr_err("iSCSI Login negotiation failed.\n"); 1107e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1108e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_INIT_ERR); 1109e48354ceSNicholas Bellinger if (!zero_tsih || !conn->sess) 1110e48354ceSNicholas Bellinger goto old_sess_out; 1111e48354ceSNicholas Bellinger if (conn->sess->se_sess) 1112e48354ceSNicholas Bellinger transport_free_session(conn->sess->se_sess); 1113e48354ceSNicholas Bellinger if (conn->sess->session_index != 0) { 1114e48354ceSNicholas Bellinger spin_lock_bh(&sess_idr_lock); 1115e48354ceSNicholas Bellinger idr_remove(&sess_idr, conn->sess->session_index); 1116e48354ceSNicholas Bellinger spin_unlock_bh(&sess_idr_lock); 1117e48354ceSNicholas Bellinger } 1118e48354ceSNicholas Bellinger kfree(conn->sess->sess_ops); 1119e48354ceSNicholas Bellinger kfree(conn->sess); 1120e48354ceSNicholas Bellinger old_sess_out: 1121e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1122e48354ceSNicholas Bellinger /* 1123e48354ceSNicholas Bellinger * If login negotiation fails check if the Time2Retain timer 1124e48354ceSNicholas Bellinger * needs to be restarted. 1125e48354ceSNicholas Bellinger */ 1126e48354ceSNicholas Bellinger if (!zero_tsih && conn->sess) { 1127e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->conn_lock); 1128e48354ceSNicholas Bellinger if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { 1129e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = 1130e48354ceSNicholas Bellinger &ISCSI_TPG_C(conn)->tpg_se_tpg; 1131e48354ceSNicholas Bellinger 1132e48354ceSNicholas Bellinger atomic_set(&conn->sess->session_continuation, 0); 1133e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1134e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 1135e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(conn->sess); 1136e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 1137e48354ceSNicholas Bellinger } else 1138e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1139e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(conn->sess); 1140e48354ceSNicholas Bellinger } 1141e48354ceSNicholas Bellinger 1142e48354ceSNicholas Bellinger if (!IS_ERR(conn->conn_rx_hash.tfm)) 1143e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 1144e48354ceSNicholas Bellinger if (!IS_ERR(conn->conn_tx_hash.tfm)) 1145e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_tx_hash.tfm); 1146e48354ceSNicholas Bellinger 1147e48354ceSNicholas Bellinger if (conn->conn_cpumask) 1148e48354ceSNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 1149e48354ceSNicholas Bellinger 1150e48354ceSNicholas Bellinger kfree(conn->conn_ops); 1151e48354ceSNicholas Bellinger 1152e48354ceSNicholas Bellinger if (conn->param_list) { 1153e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 1154e48354ceSNicholas Bellinger conn->param_list = NULL; 1155e48354ceSNicholas Bellinger } 1156bf6932f4SAl Viro if (conn->sock) 1157e48354ceSNicholas Bellinger sock_release(conn->sock); 1158e48354ceSNicholas Bellinger kfree(conn); 1159e48354ceSNicholas Bellinger 1160e48354ceSNicholas Bellinger if (tpg) { 1161e48354ceSNicholas Bellinger iscsit_deaccess_np(np, tpg); 1162e48354ceSNicholas Bellinger tpg = NULL; 1163e48354ceSNicholas Bellinger } 1164e48354ceSNicholas Bellinger 1165e48354ceSNicholas Bellinger out: 1166e48354ceSNicholas Bellinger stop = kthread_should_stop(); 1167e48354ceSNicholas Bellinger if (!stop && signal_pending(current)) { 1168e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1169e48354ceSNicholas Bellinger stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN); 1170e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1171e48354ceSNicholas Bellinger } 1172e48354ceSNicholas Bellinger /* Wait for another socket.. */ 1173e48354ceSNicholas Bellinger if (!stop) 1174e48354ceSNicholas Bellinger return 1; 1175e48354ceSNicholas Bellinger 1176e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1177e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1178e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_EXIT; 1179e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1180e48354ceSNicholas Bellinger return 0; 1181e48354ceSNicholas Bellinger } 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger int iscsi_target_login_thread(void *arg) 1184e48354ceSNicholas Bellinger { 11858359cf43SJörn Engel struct iscsi_np *np = arg; 1186e48354ceSNicholas Bellinger int ret; 1187e48354ceSNicholas Bellinger 1188e48354ceSNicholas Bellinger allow_signal(SIGINT); 1189e48354ceSNicholas Bellinger 1190e48354ceSNicholas Bellinger while (!kthread_should_stop()) { 1191e48354ceSNicholas Bellinger ret = __iscsi_target_login_thread(np); 1192e48354ceSNicholas Bellinger /* 1193e48354ceSNicholas Bellinger * We break and exit here unless another sock_accept() call 1194e48354ceSNicholas Bellinger * is expected. 1195e48354ceSNicholas Bellinger */ 1196e48354ceSNicholas Bellinger if (ret != 1) 1197e48354ceSNicholas Bellinger break; 1198e48354ceSNicholas Bellinger } 1199e48354ceSNicholas Bellinger 1200e48354ceSNicholas Bellinger return 0; 1201e48354ceSNicholas Bellinger } 1202