1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the login functions used by the iSCSI Target driver. 3e48354ceSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2007-2013 Datera, Inc. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11e48354ceSNicholas Bellinger * (at your option) any later version. 12e48354ceSNicholas Bellinger * 13e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16e48354ceSNicholas Bellinger * GNU General Public License for more details. 17e48354ceSNicholas Bellinger ******************************************************************************/ 18e48354ceSNicholas Bellinger 1969110e3cSHerbert Xu #include <crypto/hash.h> 20da5df620SRussell King #include <linux/module.h> 21e48354ceSNicholas Bellinger #include <linux/string.h> 22e48354ceSNicholas Bellinger #include <linux/kthread.h> 233f07c014SIngo Molnar #include <linux/sched/signal.h> 2440401530SAl Viro #include <linux/idr.h> 258dcf07beSBart Van Assche #include <linux/tcp.h> /* TCP_NODELAY */ 268dcf07beSBart Van Assche #include <net/ipv6.h> /* ipv6_addr_v4mapped() */ 27e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 28e48354ceSNicholas Bellinger #include <target/target_core_base.h> 29c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 30e48354ceSNicholas Bellinger 3167f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_core.h> 3267f091f2SSagi Grimberg #include <target/iscsi/iscsi_target_stat.h> 33e48354ceSNicholas Bellinger #include "iscsi_target_device.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_nego.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_login.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 39e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 40e48354ceSNicholas Bellinger #include "iscsi_target.h" 41e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 42e48354ceSNicholas Bellinger 43baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 44baa4d64bSNicholas Bellinger 45baa4d64bSNicholas Bellinger static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) 46e48354ceSNicholas Bellinger { 47baa4d64bSNicholas Bellinger struct iscsi_login *login; 48baa4d64bSNicholas Bellinger 49baa4d64bSNicholas Bellinger login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); 50baa4d64bSNicholas Bellinger if (!login) { 51baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_login.\n"); 52baa4d64bSNicholas Bellinger return NULL; 53baa4d64bSNicholas Bellinger } 54a91eb7d9SNicholas Bellinger conn->login = login; 55baa4d64bSNicholas Bellinger login->conn = conn; 56baa4d64bSNicholas Bellinger login->first_request = 1; 57baa4d64bSNicholas Bellinger 58baa4d64bSNicholas Bellinger login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); 59baa4d64bSNicholas Bellinger if (!login->req_buf) { 60baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for response buffer.\n"); 61baa4d64bSNicholas Bellinger goto out_login; 62baa4d64bSNicholas Bellinger } 63baa4d64bSNicholas Bellinger 64baa4d64bSNicholas Bellinger login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); 65baa4d64bSNicholas Bellinger if (!login->rsp_buf) { 66baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for request buffer.\n"); 67baa4d64bSNicholas Bellinger goto out_req_buf; 68baa4d64bSNicholas Bellinger } 69baa4d64bSNicholas Bellinger 70baa4d64bSNicholas Bellinger conn->conn_login = login; 71e48354ceSNicholas Bellinger 72baa4d64bSNicholas Bellinger return login; 73baa4d64bSNicholas Bellinger 74baa4d64bSNicholas Bellinger out_req_buf: 75baa4d64bSNicholas Bellinger kfree(login->req_buf); 76baa4d64bSNicholas Bellinger out_login: 77baa4d64bSNicholas Bellinger kfree(login); 78baa4d64bSNicholas Bellinger return NULL; 79e48354ceSNicholas Bellinger } 80e48354ceSNicholas Bellinger 81e48354ceSNicholas Bellinger /* 82e48354ceSNicholas Bellinger * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup 83e48354ceSNicholas Bellinger * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel 84e48354ceSNicholas Bellinger */ 85e48354ceSNicholas Bellinger int iscsi_login_setup_crypto(struct iscsi_conn *conn) 86e48354ceSNicholas Bellinger { 8769110e3cSHerbert Xu struct crypto_ahash *tfm; 8869110e3cSHerbert Xu 89e48354ceSNicholas Bellinger /* 90e48354ceSNicholas Bellinger * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts 91e48354ceSNicholas Bellinger * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback 92e48354ceSNicholas Bellinger * to software 1x8 byte slicing from crc32c.ko 93e48354ceSNicholas Bellinger */ 9469110e3cSHerbert Xu tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 9569110e3cSHerbert Xu if (IS_ERR(tfm)) { 9669110e3cSHerbert Xu pr_err("crypto_alloc_ahash() failed\n"); 97e48354ceSNicholas Bellinger return -ENOMEM; 98e48354ceSNicholas Bellinger } 99e48354ceSNicholas Bellinger 10069110e3cSHerbert Xu conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL); 10169110e3cSHerbert Xu if (!conn->conn_rx_hash) { 10269110e3cSHerbert Xu pr_err("ahash_request_alloc() failed for conn_rx_hash\n"); 10369110e3cSHerbert Xu crypto_free_ahash(tfm); 104e48354ceSNicholas Bellinger return -ENOMEM; 105e48354ceSNicholas Bellinger } 10669110e3cSHerbert Xu ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL); 10769110e3cSHerbert Xu 10869110e3cSHerbert Xu conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL); 10969110e3cSHerbert Xu if (!conn->conn_tx_hash) { 11069110e3cSHerbert Xu pr_err("ahash_request_alloc() failed for conn_tx_hash\n"); 11169110e3cSHerbert Xu ahash_request_free(conn->conn_rx_hash); 11269110e3cSHerbert Xu conn->conn_rx_hash = NULL; 11369110e3cSHerbert Xu crypto_free_ahash(tfm); 11469110e3cSHerbert Xu return -ENOMEM; 11569110e3cSHerbert Xu } 11669110e3cSHerbert Xu ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); 117e48354ceSNicholas Bellinger 118e48354ceSNicholas Bellinger return 0; 119e48354ceSNicholas Bellinger } 120e48354ceSNicholas Bellinger 121e48354ceSNicholas Bellinger static int iscsi_login_check_initiator_version( 122e48354ceSNicholas Bellinger struct iscsi_conn *conn, 123e48354ceSNicholas Bellinger u8 version_max, 124e48354ceSNicholas Bellinger u8 version_min) 125e48354ceSNicholas Bellinger { 126e48354ceSNicholas Bellinger if ((version_max != 0x00) || (version_min != 0x00)) { 127e48354ceSNicholas Bellinger pr_err("Unsupported iSCSI IETF Pre-RFC Revision," 128e48354ceSNicholas Bellinger " version Min/Max 0x%02x/0x%02x, rejecting login.\n", 129e48354ceSNicholas Bellinger version_min, version_max); 130e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 131e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_VERSION); 132e48354ceSNicholas Bellinger return -1; 133e48354ceSNicholas Bellinger } 134e48354ceSNicholas Bellinger 135e48354ceSNicholas Bellinger return 0; 136e48354ceSNicholas Bellinger } 137e48354ceSNicholas Bellinger 138e48354ceSNicholas Bellinger int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) 139e48354ceSNicholas Bellinger { 140e48354ceSNicholas Bellinger int sessiontype; 141e48354ceSNicholas Bellinger struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; 142e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 143e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 144e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 145e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 146e48354ceSNicholas Bellinger 147e48354ceSNicholas Bellinger initiatorname_param = iscsi_find_param_from_key( 148e48354ceSNicholas Bellinger INITIATORNAME, conn->param_list); 149e48354ceSNicholas Bellinger sessiontype_param = iscsi_find_param_from_key( 150e48354ceSNicholas Bellinger SESSIONTYPE, conn->param_list); 1511c5c12c6SRoland Dreier if (!initiatorname_param || !sessiontype_param) { 1521c5c12c6SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1531c5c12c6SRoland Dreier ISCSI_LOGIN_STATUS_MISSING_FIELDS); 154e48354ceSNicholas Bellinger return -1; 1551c5c12c6SRoland Dreier } 156e48354ceSNicholas Bellinger 157e48354ceSNicholas Bellinger sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; 158e48354ceSNicholas Bellinger 159e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 160e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 161e48354ceSNicholas Bellinger sess_list) { 162e48354ceSNicholas Bellinger 1638359cf43SJörn Engel sess_p = se_sess->fabric_sess_ptr; 164e48354ceSNicholas Bellinger spin_lock(&sess_p->conn_lock); 165e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 166e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 167e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 168e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 169e48354ceSNicholas Bellinger continue; 170e48354ceSNicholas Bellinger } 1718359cf43SJörn Engel if (!memcmp(sess_p->isid, conn->sess->isid, 6) && 1728359cf43SJörn Engel (!strcmp(sess_p->sess_ops->InitiatorName, 1738359cf43SJörn Engel initiatorname_param->value) && 174e48354ceSNicholas Bellinger (sess_p->sess_ops->SessionType == sessiontype))) { 175e48354ceSNicholas Bellinger atomic_set(&sess_p->session_reinstatement, 1); 176197b806aSNicholas Bellinger atomic_set(&sess_p->session_fall_back_to_erl0, 1); 177e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 178e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 179e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 180e48354ceSNicholas Bellinger sess = sess_p; 181e48354ceSNicholas Bellinger break; 182e48354ceSNicholas Bellinger } 183e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 184e48354ceSNicholas Bellinger } 185e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 186e48354ceSNicholas Bellinger /* 187e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 188e48354ceSNicholas Bellinger */ 189e48354ceSNicholas Bellinger if (!sess) 190e48354ceSNicholas Bellinger return 0; 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger pr_debug("%s iSCSI Session SID %u is still active for %s," 1930d5efb8aSBart Van Assche " performing session reinstatement.\n", (sessiontype) ? 194e48354ceSNicholas Bellinger "Discovery" : "Normal", sess->sid, 195e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 196e48354ceSNicholas Bellinger 197e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 198e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 199e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 200e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 20144f33d0fSChristoph Hellwig iscsit_close_session(sess); 20299367f01SNicholas Bellinger return 0; 203e48354ceSNicholas Bellinger } 204e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 205e48354ceSNicholas Bellinger 206e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 207e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 208e48354ceSNicholas Bellinger 20944f33d0fSChristoph Hellwig iscsit_close_session(sess); 21099367f01SNicholas Bellinger return 0; 211e48354ceSNicholas Bellinger } 212e48354ceSNicholas Bellinger 2136787ab81SJason A. Donenfeld static int iscsi_login_set_conn_values( 214e48354ceSNicholas Bellinger struct iscsi_session *sess, 215e48354ceSNicholas Bellinger struct iscsi_conn *conn, 21650e5c87dSChristoph Hellwig __be16 cid) 217e48354ceSNicholas Bellinger { 2186787ab81SJason A. Donenfeld int ret; 219e48354ceSNicholas Bellinger conn->sess = sess; 22050e5c87dSChristoph Hellwig conn->cid = be16_to_cpu(cid); 221e48354ceSNicholas Bellinger /* 222e48354ceSNicholas Bellinger * Generate a random Status sequence number (statsn) for the new 223e48354ceSNicholas Bellinger * iSCSI connection. 224e48354ceSNicholas Bellinger */ 2256787ab81SJason A. Donenfeld ret = get_random_bytes_wait(&conn->stat_sn, sizeof(u32)); 2266787ab81SJason A. Donenfeld if (unlikely(ret)) 2276787ab81SJason A. Donenfeld return ret; 228e48354ceSNicholas Bellinger 229e48354ceSNicholas Bellinger mutex_lock(&auth_id_lock); 230e48354ceSNicholas Bellinger conn->auth_id = iscsit_global->auth_id++; 231e48354ceSNicholas Bellinger mutex_unlock(&auth_id_lock); 2326787ab81SJason A. Donenfeld return 0; 233e48354ceSNicholas Bellinger } 234e48354ceSNicholas Bellinger 235d2faaefbSVarun Prakash __printf(2, 3) int iscsi_change_param_sprintf( 23679d59d08SRoland Dreier struct iscsi_conn *conn, 23779d59d08SRoland Dreier const char *fmt, ...) 23879d59d08SRoland Dreier { 23979d59d08SRoland Dreier va_list args; 24079d59d08SRoland Dreier unsigned char buf[64]; 24179d59d08SRoland Dreier 24279d59d08SRoland Dreier memset(buf, 0, sizeof buf); 24379d59d08SRoland Dreier 24479d59d08SRoland Dreier va_start(args, fmt); 24579d59d08SRoland Dreier vsnprintf(buf, sizeof buf, fmt, args); 24679d59d08SRoland Dreier va_end(args); 24779d59d08SRoland Dreier 24879d59d08SRoland Dreier if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 24979d59d08SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 25079d59d08SRoland Dreier ISCSI_LOGIN_STATUS_NO_RESOURCES); 25179d59d08SRoland Dreier return -1; 25279d59d08SRoland Dreier } 25379d59d08SRoland Dreier 25479d59d08SRoland Dreier return 0; 25579d59d08SRoland Dreier } 256d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsi_change_param_sprintf); 25779d59d08SRoland Dreier 258e48354ceSNicholas Bellinger /* 259e48354ceSNicholas Bellinger * This is the leading connection of a new session, 260e48354ceSNicholas Bellinger * or session reinstatement. 261e48354ceSNicholas Bellinger */ 262e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s1( 263e48354ceSNicholas Bellinger struct iscsi_conn *conn, 264e48354ceSNicholas Bellinger unsigned char *buf) 265e48354ceSNicholas Bellinger { 266e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL; 267e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 26813b5533aSBenjamin Wang int ret; 269e48354ceSNicholas Bellinger 270e48354ceSNicholas Bellinger sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); 271e48354ceSNicholas Bellinger if (!sess) { 272e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 273e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 274e48354ceSNicholas Bellinger pr_err("Could not allocate memory for session\n"); 2750957627aSNicholas Bellinger return -ENOMEM; 276e48354ceSNicholas Bellinger } 277e48354ceSNicholas Bellinger 2787915919bSVincent Pelletier if (iscsi_login_set_conn_values(sess, conn, pdu->cid)) 2797915919bSVincent Pelletier goto free_sess; 2807915919bSVincent Pelletier 281e48354ceSNicholas Bellinger sess->init_task_tag = pdu->itt; 2828359cf43SJörn Engel memcpy(&sess->isid, pdu->isid, 6); 28350e5c87dSChristoph Hellwig sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); 284e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_conn_list); 285e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); 286e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_active_list); 287e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_inactive_list); 288e48354ceSNicholas Bellinger init_completion(&sess->async_msg_comp); 289e48354ceSNicholas Bellinger init_completion(&sess->reinstatement_comp); 290e48354ceSNicholas Bellinger init_completion(&sess->session_wait_comp); 291e48354ceSNicholas Bellinger init_completion(&sess->session_waiting_on_uc_comp); 292e48354ceSNicholas Bellinger mutex_init(&sess->cmdsn_mutex); 293e48354ceSNicholas Bellinger spin_lock_init(&sess->conn_lock); 294e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_a_lock); 295e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_i_lock); 296e48354ceSNicholas Bellinger spin_lock_init(&sess->session_usage_lock); 297e48354ceSNicholas Bellinger spin_lock_init(&sess->ttt_lock); 298e48354ceSNicholas Bellinger 299f7c9564aSKees Cook timer_setup(&sess->time2retain_timer, 300f7c9564aSKees Cook iscsit_handle_time2retain_timeout, 0); 3018a47aa9dSBart Van Assche 30231ff0ceeSMatthew Wilcox ret = ida_alloc(&sess_ida, GFP_KERNEL); 30313b5533aSBenjamin Wang if (ret < 0) { 30431ff0ceeSMatthew Wilcox pr_err("Session ID allocation failed %d\n", ret); 30513b5533aSBenjamin Wang iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 30613b5533aSBenjamin Wang ISCSI_LOGIN_STATUS_NO_RESOURCES); 30726abc916SMike Christie goto free_sess; 30813b5533aSBenjamin Wang } 30913b5533aSBenjamin Wang 31031ff0ceeSMatthew Wilcox sess->session_index = ret; 311e48354ceSNicholas Bellinger sess->creation_time = get_jiffies_64(); 312e48354ceSNicholas Bellinger /* 313e48354ceSNicholas Bellinger * The FFP CmdSN window values will be allocated from the TPG's 314e48354ceSNicholas Bellinger * Initiator Node's ACL once the login has been successfully completed. 315e48354ceSNicholas Bellinger */ 316109e2381SRoland Dreier atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); 317e48354ceSNicholas Bellinger 318e48354ceSNicholas Bellinger sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); 319e48354ceSNicholas Bellinger if (!sess->sess_ops) { 320e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 321e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 322e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 323e48354ceSNicholas Bellinger " struct iscsi_sess_ops.\n"); 32431ff0ceeSMatthew Wilcox goto free_id; 325e48354ceSNicholas Bellinger } 326e48354ceSNicholas Bellinger 327317f8971SBart Van Assche sess->se_sess = transport_alloc_session(TARGET_PROT_NORMAL); 3280957627aSNicholas Bellinger if (IS_ERR(sess->se_sess)) { 329e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 330e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 33126abc916SMike Christie goto free_ops; 332e48354ceSNicholas Bellinger } 333e48354ceSNicholas Bellinger 334e48354ceSNicholas Bellinger return 0; 33526abc916SMike Christie 33626abc916SMike Christie free_ops: 33726abc916SMike Christie kfree(sess->sess_ops); 33831ff0ceeSMatthew Wilcox free_id: 33931ff0ceeSMatthew Wilcox ida_free(&sess_ida, sess->session_index); 34026abc916SMike Christie free_sess: 34126abc916SMike Christie kfree(sess); 34226abc916SMike Christie conn->sess = NULL; 34326abc916SMike Christie return -ENOMEM; 344e48354ceSNicholas Bellinger } 345e48354ceSNicholas Bellinger 346e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s2( 347e48354ceSNicholas Bellinger struct iscsi_conn *conn) 348e48354ceSNicholas Bellinger { 349e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 350e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 35103aa2070SNicholas Bellinger bool iser = false; 352e48354ceSNicholas Bellinger 353e48354ceSNicholas Bellinger sess->tpg = conn->tpg; 354e48354ceSNicholas Bellinger 355e48354ceSNicholas Bellinger /* 356e48354ceSNicholas Bellinger * Assign a new TPG Session Handle. Note this is protected with 357e48354ceSNicholas Bellinger * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). 358e48354ceSNicholas Bellinger */ 35960bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 360e48354ceSNicholas Bellinger if (!sess->tsih) 36160bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 362e48354ceSNicholas Bellinger 363e48354ceSNicholas Bellinger /* 364e48354ceSNicholas Bellinger * Create the default params from user defined values.. 365e48354ceSNicholas Bellinger */ 366e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 36760bfcf8eSAndy Grover conn->tpg->param_list, 1) < 0) { 368e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 369e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 370e48354ceSNicholas Bellinger return -1; 371e48354ceSNicholas Bellinger } 372e48354ceSNicholas Bellinger 37303aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 37403aa2070SNicholas Bellinger iser = true; 37503aa2070SNicholas Bellinger 37603aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 377e48354ceSNicholas Bellinger 378e48354ceSNicholas Bellinger if (sess->sess_ops->SessionType) 379e48354ceSNicholas Bellinger return iscsi_set_keys_irrelevant_for_discovery( 380e48354ceSNicholas Bellinger conn->param_list); 381e48354ceSNicholas Bellinger 382e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 383e48354ceSNicholas Bellinger 384e48354ceSNicholas Bellinger /* 385e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 386e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 387e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 388e48354ceSNicholas Bellinger * 389e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 390e48354ceSNicholas Bellinger */ 39179d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 392e48354ceSNicholas Bellinger return -1; 393e48354ceSNicholas Bellinger 394e48354ceSNicholas Bellinger /* 395e48354ceSNicholas Bellinger * Workaround for Initiators that have broken connection recovery logic. 396e48354ceSNicholas Bellinger * 397e48354ceSNicholas Bellinger * "We would really like to get rid of this." Linux-iSCSI.org team 398e48354ceSNicholas Bellinger */ 39979d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) 400e48354ceSNicholas Bellinger return -1; 401e48354ceSNicholas Bellinger 40203aa2070SNicholas Bellinger /* 40303aa2070SNicholas Bellinger * Set RDMAExtensions=Yes by default for iSER enabled network portals 40403aa2070SNicholas Bellinger */ 40503aa2070SNicholas Bellinger if (iser) { 40603aa2070SNicholas Bellinger struct iscsi_param *param; 40703aa2070SNicholas Bellinger unsigned long mrdsl, off; 40803aa2070SNicholas Bellinger int rc; 40903aa2070SNicholas Bellinger 41079d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) 41103aa2070SNicholas Bellinger return -1; 41279d59d08SRoland Dreier 41303aa2070SNicholas Bellinger /* 41403aa2070SNicholas Bellinger * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for 4153fc6a642SColin Ian King * Immediate Data + Unsolicited Data-OUT if necessary.. 41603aa2070SNicholas Bellinger */ 41703aa2070SNicholas Bellinger param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", 41803aa2070SNicholas Bellinger conn->param_list); 41903aa2070SNicholas Bellinger if (!param) { 42003aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 42103aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 42203aa2070SNicholas Bellinger return -1; 42303aa2070SNicholas Bellinger } 42457103d7fSJingoo Han rc = kstrtoul(param->value, 0, &mrdsl); 42503aa2070SNicholas Bellinger if (rc < 0) { 42603aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 42703aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 42803aa2070SNicholas Bellinger return -1; 42903aa2070SNicholas Bellinger } 43003aa2070SNicholas Bellinger off = mrdsl % PAGE_SIZE; 43103aa2070SNicholas Bellinger if (!off) 43252d0aa79SNicholas Bellinger goto check_prot; 43303aa2070SNicholas Bellinger 43403aa2070SNicholas Bellinger if (mrdsl < PAGE_SIZE) 43503aa2070SNicholas Bellinger mrdsl = PAGE_SIZE; 43603aa2070SNicholas Bellinger else 43703aa2070SNicholas Bellinger mrdsl -= off; 43803aa2070SNicholas Bellinger 43903aa2070SNicholas Bellinger pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" 44003aa2070SNicholas Bellinger " to PAGE_SIZE\n", mrdsl); 44103aa2070SNicholas Bellinger 44279d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) 44303aa2070SNicholas Bellinger return -1; 44452d0aa79SNicholas Bellinger /* 44552d0aa79SNicholas Bellinger * ISER currently requires that ImmediateData + Unsolicited 44652d0aa79SNicholas Bellinger * Data be disabled when protection / signature MRs are enabled. 44752d0aa79SNicholas Bellinger */ 44852d0aa79SNicholas Bellinger check_prot: 44952d0aa79SNicholas Bellinger if (sess->se_sess->sup_prot_ops & 45052d0aa79SNicholas Bellinger (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | 45152d0aa79SNicholas Bellinger TARGET_PROT_DOUT_INSERT)) { 45252d0aa79SNicholas Bellinger 45379d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) 45452d0aa79SNicholas Bellinger return -1; 45552d0aa79SNicholas Bellinger 45679d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) 45752d0aa79SNicholas Bellinger return -1; 45879d59d08SRoland Dreier 45952d0aa79SNicholas Bellinger pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" 46052d0aa79SNicholas Bellinger " T10-PI enabled ISER session\n"); 46152d0aa79SNicholas Bellinger } 46203aa2070SNicholas Bellinger } 463e48354ceSNicholas Bellinger 464e48354ceSNicholas Bellinger return 0; 465e48354ceSNicholas Bellinger } 466e48354ceSNicholas Bellinger 467e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s1( 468e48354ceSNicholas Bellinger struct iscsi_conn *conn, 469e48354ceSNicholas Bellinger unsigned char *buf) 470e48354ceSNicholas Bellinger { 471e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 472e48354ceSNicholas Bellinger 4736787ab81SJason A. Donenfeld return iscsi_login_set_conn_values(NULL, conn, pdu->cid); 474e48354ceSNicholas Bellinger } 475e48354ceSNicholas Bellinger 476e48354ceSNicholas Bellinger /* 477e48354ceSNicholas Bellinger * Add a new connection to an existing session. 478e48354ceSNicholas Bellinger */ 479e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s2( 480e48354ceSNicholas Bellinger struct iscsi_conn *conn, 481e48354ceSNicholas Bellinger unsigned char *buf) 482e48354ceSNicholas Bellinger { 483e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 484e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 485e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 486e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 487e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 48803aa2070SNicholas Bellinger bool iser = false; 489e48354ceSNicholas Bellinger 490e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 491e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 492e48354ceSNicholas Bellinger sess_list) { 493e48354ceSNicholas Bellinger 494e48354ceSNicholas Bellinger sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; 495e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 496e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 497e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) 498e48354ceSNicholas Bellinger continue; 4998359cf43SJörn Engel if (!memcmp(sess_p->isid, pdu->isid, 6) && 50050e5c87dSChristoph Hellwig (sess_p->tsih == be16_to_cpu(pdu->tsih))) { 501e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 502e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 503e48354ceSNicholas Bellinger sess = sess_p; 504e48354ceSNicholas Bellinger break; 505e48354ceSNicholas Bellinger } 506e48354ceSNicholas Bellinger } 507e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 508e48354ceSNicholas Bellinger 509e48354ceSNicholas Bellinger /* 510e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 511e48354ceSNicholas Bellinger */ 512e48354ceSNicholas Bellinger if (!sess) { 513e48354ceSNicholas Bellinger pr_err("Initiator attempting to add a connection to" 514e48354ceSNicholas Bellinger " a non-existent session, rejecting iSCSI Login.\n"); 515e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 516e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_SESSION); 517e48354ceSNicholas Bellinger return -1; 518e48354ceSNicholas Bellinger } 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger /* 521e48354ceSNicholas Bellinger * Stop the Time2Retain timer if this is a failed session, we restart 522e48354ceSNicholas Bellinger * the timer if the login is not successful. 523e48354ceSNicholas Bellinger */ 524e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 525e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) 526e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 1); 527e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 528e48354ceSNicholas Bellinger 5296787ab81SJason A. Donenfeld if (iscsi_login_set_conn_values(sess, conn, pdu->cid) < 0 || 5306787ab81SJason A. Donenfeld iscsi_copy_param_list(&conn->param_list, 53160bfcf8eSAndy Grover conn->tpg->param_list, 0) < 0) { 532e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 533e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 534e48354ceSNicholas Bellinger return -1; 535e48354ceSNicholas Bellinger } 536e48354ceSNicholas Bellinger 53703aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 53803aa2070SNicholas Bellinger iser = true; 53903aa2070SNicholas Bellinger 54003aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 541e48354ceSNicholas Bellinger /* 542e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 543e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 544e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 545e48354ceSNicholas Bellinger * 546e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 547e48354ceSNicholas Bellinger */ 54879d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 549e48354ceSNicholas Bellinger return -1; 550e48354ceSNicholas Bellinger 551c04a6091SChristophe Vu-Brugier return 0; 552e48354ceSNicholas Bellinger } 553e48354ceSNicholas Bellinger 554e48354ceSNicholas Bellinger int iscsi_login_post_auth_non_zero_tsih( 555e48354ceSNicholas Bellinger struct iscsi_conn *conn, 556e48354ceSNicholas Bellinger u16 cid, 557e48354ceSNicholas Bellinger u32 exp_statsn) 558e48354ceSNicholas Bellinger { 559e48354ceSNicholas Bellinger struct iscsi_conn *conn_ptr = NULL; 560e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 561e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger /* 564e48354ceSNicholas Bellinger * By following item 5 in the login table, if we have found 565e48354ceSNicholas Bellinger * an existing ISID and a valid/existing TSIH and an existing 566e48354ceSNicholas Bellinger * CID we do connection reinstatement. Currently we dont not 567e48354ceSNicholas Bellinger * support it so we send back an non-zero status class to the 568e48354ceSNicholas Bellinger * initiator and release the new connection. 569e48354ceSNicholas Bellinger */ 570e48354ceSNicholas Bellinger conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); 571ee1b1b9cSAndy Grover if (conn_ptr) { 572e48354ceSNicholas Bellinger pr_err("Connection exists with CID %hu for %s," 573e48354ceSNicholas Bellinger " performing connection reinstatement.\n", 574e48354ceSNicholas Bellinger conn_ptr->cid, sess->sess_ops->InitiatorName); 575e48354ceSNicholas Bellinger 576e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(conn_ptr); 577e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_ptr); 578e48354ceSNicholas Bellinger } 579e48354ceSNicholas Bellinger 580e48354ceSNicholas Bellinger /* 581902ff860SColin Ian King * Check for any connection recovery entries containing CID. 582e48354ceSNicholas Bellinger * We use the original ExpStatSN sent in the first login request 583e48354ceSNicholas Bellinger * to acknowledge commands for the failed connection. 584e48354ceSNicholas Bellinger * 585e48354ceSNicholas Bellinger * Also note that an explict logout may have already been sent, 586e48354ceSNicholas Bellinger * but the response may not be sent due to additional connection 587e48354ceSNicholas Bellinger * loss. 588e48354ceSNicholas Bellinger */ 589e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) { 590e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 591e48354ceSNicholas Bellinger sess, cid); 592ee1b1b9cSAndy Grover if (cr) { 593e48354ceSNicholas Bellinger pr_debug("Performing implicit logout" 594e48354ceSNicholas Bellinger " for connection recovery on CID: %hu\n", 595e48354ceSNicholas Bellinger conn->cid); 596e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); 597e48354ceSNicholas Bellinger } 598e48354ceSNicholas Bellinger } 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger /* 601e48354ceSNicholas Bellinger * Else we follow item 4 from the login table in that we have 602e48354ceSNicholas Bellinger * found an existing ISID and a valid/existing TSIH and a new 603e48354ceSNicholas Bellinger * CID we go ahead and continue to add a new connection to the 604e48354ceSNicholas Bellinger * session. 605e48354ceSNicholas Bellinger */ 606e48354ceSNicholas Bellinger pr_debug("Adding CID %hu to existing session for %s.\n", 607e48354ceSNicholas Bellinger cid, sess->sess_ops->InitiatorName); 608e48354ceSNicholas Bellinger 609e48354ceSNicholas Bellinger if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { 610e48354ceSNicholas Bellinger pr_err("Adding additional connection to this session" 611e48354ceSNicholas Bellinger " would exceed MaxConnections %d, login failed.\n", 612e48354ceSNicholas Bellinger sess->sess_ops->MaxConnections); 613e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 614e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ISID_ERROR); 615e48354ceSNicholas Bellinger return -1; 616e48354ceSNicholas Bellinger } 617e48354ceSNicholas Bellinger 618e48354ceSNicholas Bellinger return 0; 619e48354ceSNicholas Bellinger } 620e48354ceSNicholas Bellinger 621e48354ceSNicholas Bellinger static void iscsi_post_login_start_timers(struct iscsi_conn *conn) 622e48354ceSNicholas Bellinger { 623e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 62403aa2070SNicholas Bellinger /* 6253fc6a642SColin Ian King * FIXME: Unsolicited NopIN support for ISER 62603aa2070SNicholas Bellinger */ 62703aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 62803aa2070SNicholas Bellinger return; 629e48354ceSNicholas Bellinger 630e48354ceSNicholas Bellinger if (!sess->sess_ops->SessionType) 631e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 632e48354ceSNicholas Bellinger } 633e48354ceSNicholas Bellinger 634e5419865SNicholas Bellinger int iscsit_start_kthreads(struct iscsi_conn *conn) 63588dcd2daSNicholas Bellinger { 63688dcd2daSNicholas Bellinger int ret = 0; 63788dcd2daSNicholas Bellinger 63888dcd2daSNicholas Bellinger spin_lock(&iscsit_global->ts_bitmap_lock); 63988dcd2daSNicholas Bellinger conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, 64088dcd2daSNicholas Bellinger ISCSIT_BITMAP_BITS, get_order(1)); 64188dcd2daSNicholas Bellinger spin_unlock(&iscsit_global->ts_bitmap_lock); 64288dcd2daSNicholas Bellinger 64388dcd2daSNicholas Bellinger if (conn->bitmap_id < 0) { 64488dcd2daSNicholas Bellinger pr_err("bitmap_find_free_region() failed for" 64588dcd2daSNicholas Bellinger " iscsit_start_kthreads()\n"); 64688dcd2daSNicholas Bellinger return -ENOMEM; 64788dcd2daSNicholas Bellinger } 64888dcd2daSNicholas Bellinger 64988dcd2daSNicholas Bellinger conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, 65088dcd2daSNicholas Bellinger "%s", ISCSI_TX_THREAD_NAME); 65188dcd2daSNicholas Bellinger if (IS_ERR(conn->tx_thread)) { 65288dcd2daSNicholas Bellinger pr_err("Unable to start iscsi_target_tx_thread\n"); 65388dcd2daSNicholas Bellinger ret = PTR_ERR(conn->tx_thread); 65488dcd2daSNicholas Bellinger goto out_bitmap; 65588dcd2daSNicholas Bellinger } 65688dcd2daSNicholas Bellinger conn->tx_thread_active = true; 65788dcd2daSNicholas Bellinger 65888dcd2daSNicholas Bellinger conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, 65988dcd2daSNicholas Bellinger "%s", ISCSI_RX_THREAD_NAME); 66088dcd2daSNicholas Bellinger if (IS_ERR(conn->rx_thread)) { 66188dcd2daSNicholas Bellinger pr_err("Unable to start iscsi_target_rx_thread\n"); 66288dcd2daSNicholas Bellinger ret = PTR_ERR(conn->rx_thread); 66388dcd2daSNicholas Bellinger goto out_tx; 66488dcd2daSNicholas Bellinger } 66588dcd2daSNicholas Bellinger conn->rx_thread_active = true; 66688dcd2daSNicholas Bellinger 66788dcd2daSNicholas Bellinger return 0; 66888dcd2daSNicholas Bellinger out_tx: 669e5419865SNicholas Bellinger send_sig(SIGINT, conn->tx_thread, 1); 67088dcd2daSNicholas Bellinger kthread_stop(conn->tx_thread); 67188dcd2daSNicholas Bellinger conn->tx_thread_active = false; 67288dcd2daSNicholas Bellinger out_bitmap: 67388dcd2daSNicholas Bellinger spin_lock(&iscsit_global->ts_bitmap_lock); 67488dcd2daSNicholas Bellinger bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, 67588dcd2daSNicholas Bellinger get_order(1)); 67688dcd2daSNicholas Bellinger spin_unlock(&iscsit_global->ts_bitmap_lock); 67788dcd2daSNicholas Bellinger return ret; 67888dcd2daSNicholas Bellinger } 67988dcd2daSNicholas Bellinger 680e5419865SNicholas Bellinger void iscsi_post_login_handler( 681e48354ceSNicholas Bellinger struct iscsi_np *np, 682e48354ceSNicholas Bellinger struct iscsi_conn *conn, 683e48354ceSNicholas Bellinger u8 zero_tsih) 684e48354ceSNicholas Bellinger { 685e48354ceSNicholas Bellinger int stop_timer = 0; 686e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 687e48354ceSNicholas Bellinger struct se_session *se_sess = sess->se_sess; 68860bfcf8eSAndy Grover struct iscsi_portal_group *tpg = sess->tpg; 689e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 690e48354ceSNicholas Bellinger 691e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 692e48354ceSNicholas Bellinger 693e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, 694e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ACCEPT); 695e48354ceSNicholas Bellinger 696e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); 697e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_LOGGED_IN; 698e48354ceSNicholas Bellinger 699e48354ceSNicholas Bellinger iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); 700e48354ceSNicholas Bellinger /* 701e48354ceSNicholas Bellinger * SCSI Initiator -> SCSI Target Port Mapping 702e48354ceSNicholas Bellinger */ 703e48354ceSNicholas Bellinger if (!zero_tsih) { 704e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, 705e48354ceSNicholas Bellinger conn->param_list, 0); 706e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 707e48354ceSNicholas Bellinger conn->param_list = NULL; 708e48354ceSNicholas Bellinger 709e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 710e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 0); 711e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 712e48354ceSNicholas Bellinger pr_debug("Moving to" 713e48354ceSNicholas Bellinger " TARG_SESS_STATE_LOGGED_IN.\n"); 714e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 715e48354ceSNicholas Bellinger stop_timer = 1; 716e48354ceSNicholas Bellinger } 717e48354ceSNicholas Bellinger 718dc58f760SAndy Grover pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" 719dc58f760SAndy Grover " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, 72069d75574SAndy Grover &conn->local_sockaddr, tpg->tpgt); 721e48354ceSNicholas Bellinger 722e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 723e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 724e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu" 725e48354ceSNicholas Bellinger " from node: %s\n", atomic_read(&sess->nconn), 726e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 727e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 728e48354ceSNicholas Bellinger 72988dcd2daSNicholas Bellinger iscsi_post_login_start_timers(conn); 730e48354ceSNicholas Bellinger /* 731e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 732e48354ceSNicholas Bellinger * are scheduled on the same CPU. 733e48354ceSNicholas Bellinger */ 734e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 735e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 736e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 737e5419865SNicholas Bellinger /* 738e5419865SNicholas Bellinger * Wakeup the sleeping iscsi_target_rx_thread() now that 739e5419865SNicholas Bellinger * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. 740e5419865SNicholas Bellinger */ 741e5419865SNicholas Bellinger complete(&conn->rx_login_comp); 742e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 743e5419865SNicholas Bellinger 744e48354ceSNicholas Bellinger if (stop_timer) { 745e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 746e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 747e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 748e48354ceSNicholas Bellinger } 749e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 750e5419865SNicholas Bellinger return; 751e48354ceSNicholas Bellinger } 752e48354ceSNicholas Bellinger 753e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); 754e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 755e48354ceSNicholas Bellinger conn->param_list = NULL; 756e48354ceSNicholas Bellinger 757e48354ceSNicholas Bellinger iscsit_determine_maxcmdsn(sess); 758e48354ceSNicholas Bellinger 759e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 760e48354ceSNicholas Bellinger __transport_register_session(&sess->tpg->tpg_se_tpg, 7618359cf43SJörn Engel se_sess->se_node_acl, se_sess, sess); 762e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); 763e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 764e48354ceSNicholas Bellinger 765dc58f760SAndy Grover pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", 766dc58f760SAndy Grover conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, 7672f9bc894SNicholas Bellinger tpg->tpgt); 768e48354ceSNicholas Bellinger 769e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 770e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 771e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 772e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu from node:" 773e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 774e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 775e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 776e48354ceSNicholas Bellinger 777e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 778e48354ceSNicholas Bellinger if (!sess->sid) 779e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 780e48354ceSNicholas Bellinger pr_debug("Established iSCSI session from node: %s\n", 781e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 782e48354ceSNicholas Bellinger 783e48354ceSNicholas Bellinger tpg->nsessions++; 784e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 785e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions++; 786e48354ceSNicholas Bellinger 787e48354ceSNicholas Bellinger pr_debug("Incremented number of active iSCSI sessions to %u on" 788e48354ceSNicholas Bellinger " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); 789e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 792e48354ceSNicholas Bellinger /* 793e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 794e48354ceSNicholas Bellinger * are scheduled on the same CPU. 795e48354ceSNicholas Bellinger */ 796e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 797e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 798e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 799e5419865SNicholas Bellinger /* 800e5419865SNicholas Bellinger * Wakeup the sleeping iscsi_target_rx_thread() now that 801e5419865SNicholas Bellinger * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. 802e5419865SNicholas Bellinger */ 803e5419865SNicholas Bellinger complete(&conn->rx_login_comp); 804e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 805e48354ceSNicholas Bellinger } 806e48354ceSNicholas Bellinger 807f7c9564aSKees Cook void iscsi_handle_login_thread_timeout(struct timer_list *t) 808e48354ceSNicholas Bellinger { 809f7c9564aSKees Cook struct iscsi_np *np = from_timer(np, t, np_login_timer); 810e48354ceSNicholas Bellinger 811e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 81269d75574SAndy Grover pr_err("iSCSI Login timeout on Network Portal %pISpc\n", 81369d75574SAndy Grover &np->np_sockaddr); 814e48354ceSNicholas Bellinger 815e48354ceSNicholas Bellinger if (np->np_login_timer_flags & ISCSI_TF_STOP) { 816e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 817e48354ceSNicholas Bellinger return; 818e48354ceSNicholas Bellinger } 819e48354ceSNicholas Bellinger 820e48354ceSNicholas Bellinger if (np->np_thread) 821e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 822e48354ceSNicholas Bellinger 823e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 824e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 825e48354ceSNicholas Bellinger } 826e48354ceSNicholas Bellinger 827e48354ceSNicholas Bellinger static void iscsi_start_login_thread_timer(struct iscsi_np *np) 828e48354ceSNicholas Bellinger { 829e48354ceSNicholas Bellinger /* 830e48354ceSNicholas Bellinger * This used the TA_LOGIN_TIMEOUT constant because at this 831e48354ceSNicholas Bellinger * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout 832e48354ceSNicholas Bellinger */ 833e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 834e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_STOP; 835e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_RUNNING; 8368a47aa9dSBart Van Assche mod_timer(&np->np_login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ); 837e48354ceSNicholas Bellinger 838e48354ceSNicholas Bellinger pr_debug("Added timeout timer to iSCSI login request for" 839e48354ceSNicholas Bellinger " %u seconds.\n", TA_LOGIN_TIMEOUT); 840e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 841e48354ceSNicholas Bellinger } 842e48354ceSNicholas Bellinger 843e48354ceSNicholas Bellinger static void iscsi_stop_login_thread_timer(struct iscsi_np *np) 844e48354ceSNicholas Bellinger { 845e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 846e48354ceSNicholas Bellinger if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { 847e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 848e48354ceSNicholas Bellinger return; 849e48354ceSNicholas Bellinger } 850e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_STOP; 851e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 852e48354ceSNicholas Bellinger 853e48354ceSNicholas Bellinger del_timer_sync(&np->np_login_timer); 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 856e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 857e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 858e48354ceSNicholas Bellinger } 859e48354ceSNicholas Bellinger 860baa4d64bSNicholas Bellinger int iscsit_setup_np( 861e48354ceSNicholas Bellinger struct iscsi_np *np, 86213a3cf08SAndy Grover struct sockaddr_storage *sockaddr) 863e48354ceSNicholas Bellinger { 864baa4d64bSNicholas Bellinger struct socket *sock = NULL; 865837f6452SNicholas Bellinger int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; 866e48354ceSNicholas Bellinger 867e48354ceSNicholas Bellinger switch (np->np_network_transport) { 868e48354ceSNicholas Bellinger case ISCSI_TCP: 869e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 870e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 871e48354ceSNicholas Bellinger break; 872e48354ceSNicholas Bellinger case ISCSI_SCTP_TCP: 873e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 874e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 875e48354ceSNicholas Bellinger break; 876e48354ceSNicholas Bellinger case ISCSI_SCTP_UDP: 877e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 878e48354ceSNicholas Bellinger np->np_sock_type = SOCK_SEQPACKET; 879e48354ceSNicholas Bellinger break; 880e48354ceSNicholas Bellinger default: 881e48354ceSNicholas Bellinger pr_err("Unsupported network_transport: %d\n", 882e48354ceSNicholas Bellinger np->np_network_transport); 883e48354ceSNicholas Bellinger return -EINVAL; 884e48354ceSNicholas Bellinger } 885e48354ceSNicholas Bellinger 886e48354ceSNicholas Bellinger ret = sock_create(sockaddr->ss_family, np->np_sock_type, 887e48354ceSNicholas Bellinger np->np_ip_proto, &sock); 888e48354ceSNicholas Bellinger if (ret < 0) { 889e48354ceSNicholas Bellinger pr_err("sock_create() failed.\n"); 890e48354ceSNicholas Bellinger return ret; 891e48354ceSNicholas Bellinger } 892e48354ceSNicholas Bellinger np->np_socket = sock; 893e48354ceSNicholas Bellinger /* 894e48354ceSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 895e48354ceSNicholas Bellinger * in iscsi_target_configfs.c code.. 896e48354ceSNicholas Bellinger */ 8978359cf43SJörn Engel memcpy(&np->np_sockaddr, sockaddr, 89813a3cf08SAndy Grover sizeof(struct sockaddr_storage)); 899e48354ceSNicholas Bellinger 900e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) 901e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in6); 902e48354ceSNicholas Bellinger else 903e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in); 904e48354ceSNicholas Bellinger /* 905e48354ceSNicholas Bellinger * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. 906e48354ceSNicholas Bellinger */ 9078359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 908e48354ceSNicholas Bellinger opt = 1; 909e48354ceSNicholas Bellinger if (np->np_network_transport == ISCSI_TCP) { 910e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, 911e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 912e48354ceSNicholas Bellinger if (ret < 0) { 913e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for TCP_NODELAY" 914e48354ceSNicholas Bellinger " failed: %d\n", ret); 915e48354ceSNicholas Bellinger goto fail; 916e48354ceSNicholas Bellinger } 917e48354ceSNicholas Bellinger } 918e48354ceSNicholas Bellinger 9198359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 920e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, 921e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 922e48354ceSNicholas Bellinger if (ret < 0) { 923e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for SO_REUSEADDR" 924e48354ceSNicholas Bellinger " failed\n"); 925e48354ceSNicholas Bellinger goto fail; 926e48354ceSNicholas Bellinger } 927e48354ceSNicholas Bellinger 9289f9ef6d3SDax Kelson ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, 9299f9ef6d3SDax Kelson (char *)&opt, sizeof(opt)); 9309f9ef6d3SDax Kelson if (ret < 0) { 9319f9ef6d3SDax Kelson pr_err("kernel_setsockopt() for IP_FREEBIND" 9329f9ef6d3SDax Kelson " failed\n"); 9339f9ef6d3SDax Kelson goto fail; 9349f9ef6d3SDax Kelson } 9359f9ef6d3SDax Kelson 936e48354ceSNicholas Bellinger ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); 937e48354ceSNicholas Bellinger if (ret < 0) { 938e48354ceSNicholas Bellinger pr_err("kernel_bind() failed: %d\n", ret); 939e48354ceSNicholas Bellinger goto fail; 940e48354ceSNicholas Bellinger } 941e48354ceSNicholas Bellinger 942e48354ceSNicholas Bellinger ret = kernel_listen(sock, backlog); 943e48354ceSNicholas Bellinger if (ret != 0) { 944e48354ceSNicholas Bellinger pr_err("kernel_listen() failed: %d\n", ret); 945e48354ceSNicholas Bellinger goto fail; 946e48354ceSNicholas Bellinger } 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger return 0; 949e48354ceSNicholas Bellinger fail: 950e48354ceSNicholas Bellinger np->np_socket = NULL; 951e48354ceSNicholas Bellinger sock_release(sock); 952e48354ceSNicholas Bellinger return ret; 953e48354ceSNicholas Bellinger } 954e48354ceSNicholas Bellinger 955baa4d64bSNicholas Bellinger int iscsi_target_setup_login_socket( 956baa4d64bSNicholas Bellinger struct iscsi_np *np, 95713a3cf08SAndy Grover struct sockaddr_storage *sockaddr) 958baa4d64bSNicholas Bellinger { 959baa4d64bSNicholas Bellinger struct iscsit_transport *t; 960baa4d64bSNicholas Bellinger int rc; 961baa4d64bSNicholas Bellinger 962baa4d64bSNicholas Bellinger t = iscsit_get_transport(np->np_network_transport); 963baa4d64bSNicholas Bellinger if (!t) 964baa4d64bSNicholas Bellinger return -EINVAL; 965baa4d64bSNicholas Bellinger 966baa4d64bSNicholas Bellinger rc = t->iscsit_setup_np(np, sockaddr); 967baa4d64bSNicholas Bellinger if (rc < 0) { 968baa4d64bSNicholas Bellinger iscsit_put_transport(t); 969baa4d64bSNicholas Bellinger return rc; 970baa4d64bSNicholas Bellinger } 971baa4d64bSNicholas Bellinger 972baa4d64bSNicholas Bellinger np->np_transport = t; 97314f4b54fSSagi Grimberg np->enabled = true; 974baa4d64bSNicholas Bellinger return 0; 975baa4d64bSNicholas Bellinger } 976baa4d64bSNicholas Bellinger 977baa4d64bSNicholas Bellinger int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 978baa4d64bSNicholas Bellinger { 979baa4d64bSNicholas Bellinger struct socket *new_sock, *sock = np->np_socket; 980baa4d64bSNicholas Bellinger struct sockaddr_in sock_in; 981baa4d64bSNicholas Bellinger struct sockaddr_in6 sock_in6; 9829b2c45d4SDenys Vlasenko int rc; 983baa4d64bSNicholas Bellinger 984baa4d64bSNicholas Bellinger rc = kernel_accept(sock, &new_sock, 0); 985baa4d64bSNicholas Bellinger if (rc < 0) 986baa4d64bSNicholas Bellinger return rc; 987baa4d64bSNicholas Bellinger 988baa4d64bSNicholas Bellinger conn->sock = new_sock; 989baa4d64bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 990baa4d64bSNicholas Bellinger 991baa4d64bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 992baa4d64bSNicholas Bellinger memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); 993baa4d64bSNicholas Bellinger 994baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 9959b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in6, 1); 9969b2c45d4SDenys Vlasenko if (rc >= 0) { 997dc58f760SAndy Grover if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { 998dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); 999dc58f760SAndy Grover } else { 1000dc58f760SAndy Grover /* Pretend to be an ipv4 socket */ 1001dc58f760SAndy Grover sock_in.sin_family = AF_INET; 1002dc58f760SAndy Grover sock_in.sin_port = sock_in6.sin6_port; 1003dc58f760SAndy Grover memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); 1004dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); 1005dc58f760SAndy Grover } 1006baa4d64bSNicholas Bellinger } 1007baa4d64bSNicholas Bellinger 1008baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10099b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in6, 0); 10109b2c45d4SDenys Vlasenko if (rc >= 0) { 101169d75574SAndy Grover if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { 101269d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); 101369d75574SAndy Grover } else { 101469d75574SAndy Grover /* Pretend to be an ipv4 socket */ 101569d75574SAndy Grover sock_in.sin_family = AF_INET; 101669d75574SAndy Grover sock_in.sin_port = sock_in6.sin6_port; 101769d75574SAndy Grover memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); 101869d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); 101969d75574SAndy Grover } 1020baa4d64bSNicholas Bellinger } 1021baa4d64bSNicholas Bellinger } else { 1022baa4d64bSNicholas Bellinger memset(&sock_in, 0, sizeof(struct sockaddr_in)); 1023baa4d64bSNicholas Bellinger 1024baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10259b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in, 1); 10269b2c45d4SDenys Vlasenko if (rc >= 0) 1027dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); 1028baa4d64bSNicholas Bellinger 1029baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10309b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in, 0); 10319b2c45d4SDenys Vlasenko if (rc >= 0) 103269d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); 1033baa4d64bSNicholas Bellinger } 1034baa4d64bSNicholas Bellinger 1035baa4d64bSNicholas Bellinger return 0; 1036baa4d64bSNicholas Bellinger } 1037baa4d64bSNicholas Bellinger 1038baa4d64bSNicholas Bellinger int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 1039baa4d64bSNicholas Bellinger { 1040baa4d64bSNicholas Bellinger struct iscsi_login_req *login_req; 1041baa4d64bSNicholas Bellinger u32 padding = 0, payload_length; 1042baa4d64bSNicholas Bellinger 1043baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) 1044baa4d64bSNicholas Bellinger return -1; 1045baa4d64bSNicholas Bellinger 1046baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1047baa4d64bSNicholas Bellinger payload_length = ntoh24(login_req->dlength); 1048baa4d64bSNicholas Bellinger padding = ((-payload_length) & 3); 1049baa4d64bSNicholas Bellinger 1050baa4d64bSNicholas Bellinger pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," 1051baa4d64bSNicholas Bellinger " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", 1052baa4d64bSNicholas Bellinger login_req->flags, login_req->itt, login_req->cmdsn, 1053baa4d64bSNicholas Bellinger login_req->exp_statsn, login_req->cid, payload_length); 1054baa4d64bSNicholas Bellinger /* 1055baa4d64bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1056baa4d64bSNicholas Bellinger * login request PDU. 1057baa4d64bSNicholas Bellinger */ 1058baa4d64bSNicholas Bellinger if (login->first_request) { 1059baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1060baa4d64bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 10613e1c81a9SNicholas Bellinger login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); 1062baa4d64bSNicholas Bellinger login->version_min = login_req->min_version; 1063baa4d64bSNicholas Bellinger login->version_max = login_req->max_version; 1064baa4d64bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1065baa4d64bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1066baa4d64bSNicholas Bellinger login->init_task_tag = login_req->itt; 1067baa4d64bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1068baa4d64bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1069baa4d64bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1070baa4d64bSNicholas Bellinger } 1071baa4d64bSNicholas Bellinger 1072baa4d64bSNicholas Bellinger if (iscsi_target_check_login_request(conn, login) < 0) 1073baa4d64bSNicholas Bellinger return -1; 1074baa4d64bSNicholas Bellinger 1075baa4d64bSNicholas Bellinger memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); 1076baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req_buf, 1077baa4d64bSNicholas Bellinger payload_length + padding) < 0) 1078baa4d64bSNicholas Bellinger return -1; 1079baa4d64bSNicholas Bellinger 1080baa4d64bSNicholas Bellinger return 0; 1081baa4d64bSNicholas Bellinger } 1082baa4d64bSNicholas Bellinger 1083baa4d64bSNicholas Bellinger int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1084baa4d64bSNicholas Bellinger u32 length) 1085baa4d64bSNicholas Bellinger { 1086baa4d64bSNicholas Bellinger if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) 1087baa4d64bSNicholas Bellinger return -1; 1088baa4d64bSNicholas Bellinger 1089baa4d64bSNicholas Bellinger return 0; 1090baa4d64bSNicholas Bellinger } 1091baa4d64bSNicholas Bellinger 1092baa4d64bSNicholas Bellinger static int 1093baa4d64bSNicholas Bellinger iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) 1094baa4d64bSNicholas Bellinger { 1095baa4d64bSNicholas Bellinger int rc; 1096baa4d64bSNicholas Bellinger 1097baa4d64bSNicholas Bellinger if (!t->owner) { 1098baa4d64bSNicholas Bellinger conn->conn_transport = t; 1099baa4d64bSNicholas Bellinger return 0; 1100baa4d64bSNicholas Bellinger } 1101baa4d64bSNicholas Bellinger 1102baa4d64bSNicholas Bellinger rc = try_module_get(t->owner); 1103baa4d64bSNicholas Bellinger if (!rc) { 1104baa4d64bSNicholas Bellinger pr_err("try_module_get() failed for %s\n", t->name); 1105baa4d64bSNicholas Bellinger return -EINVAL; 1106baa4d64bSNicholas Bellinger } 1107baa4d64bSNicholas Bellinger 1108baa4d64bSNicholas Bellinger conn->conn_transport = t; 1109baa4d64bSNicholas Bellinger return 0; 1110baa4d64bSNicholas Bellinger } 1111baa4d64bSNicholas Bellinger 111205a86e78SMike Christie static struct iscsi_conn *iscsit_alloc_conn(struct iscsi_np *np) 111305a86e78SMike Christie { 111405a86e78SMike Christie struct iscsi_conn *conn; 111505a86e78SMike Christie 111605a86e78SMike Christie conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); 111705a86e78SMike Christie if (!conn) { 111805a86e78SMike Christie pr_err("Could not allocate memory for new connection\n"); 111905a86e78SMike Christie return NULL; 112005a86e78SMike Christie } 112105a86e78SMike Christie pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 112205a86e78SMike Christie conn->conn_state = TARG_CONN_STATE_FREE; 112305a86e78SMike Christie 112405a86e78SMike Christie init_waitqueue_head(&conn->queues_wq); 112505a86e78SMike Christie INIT_LIST_HEAD(&conn->conn_list); 112605a86e78SMike Christie INIT_LIST_HEAD(&conn->conn_cmd_list); 112705a86e78SMike Christie INIT_LIST_HEAD(&conn->immed_queue_list); 112805a86e78SMike Christie INIT_LIST_HEAD(&conn->response_queue_list); 112905a86e78SMike Christie init_completion(&conn->conn_post_wait_comp); 113005a86e78SMike Christie init_completion(&conn->conn_wait_comp); 113105a86e78SMike Christie init_completion(&conn->conn_wait_rcfr_comp); 113205a86e78SMike Christie init_completion(&conn->conn_waiting_on_uc_comp); 113305a86e78SMike Christie init_completion(&conn->conn_logout_comp); 113405a86e78SMike Christie init_completion(&conn->rx_half_close_comp); 113505a86e78SMike Christie init_completion(&conn->tx_half_close_comp); 113605a86e78SMike Christie init_completion(&conn->rx_login_comp); 113705a86e78SMike Christie spin_lock_init(&conn->cmd_lock); 113805a86e78SMike Christie spin_lock_init(&conn->conn_usage_lock); 113905a86e78SMike Christie spin_lock_init(&conn->immed_queue_lock); 114005a86e78SMike Christie spin_lock_init(&conn->nopin_timer_lock); 114105a86e78SMike Christie spin_lock_init(&conn->response_queue_lock); 114205a86e78SMike Christie spin_lock_init(&conn->state_lock); 114305a86e78SMike Christie 114405a86e78SMike Christie timer_setup(&conn->nopin_response_timer, 114505a86e78SMike Christie iscsit_handle_nopin_response_timeout, 0); 114605a86e78SMike Christie timer_setup(&conn->nopin_timer, iscsit_handle_nopin_timeout, 0); 114705a86e78SMike Christie 114805a86e78SMike Christie if (iscsit_conn_set_transport(conn, np->np_transport) < 0) 114905a86e78SMike Christie goto free_conn; 115005a86e78SMike Christie 115105a86e78SMike Christie conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); 115205a86e78SMike Christie if (!conn->conn_ops) { 115305a86e78SMike Christie pr_err("Unable to allocate memory for struct iscsi_conn_ops.\n"); 115405a86e78SMike Christie goto put_transport; 115505a86e78SMike Christie } 115605a86e78SMike Christie 115705a86e78SMike Christie if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { 115805a86e78SMike Christie pr_err("Unable to allocate conn->conn_cpumask\n"); 1159f55d0b40Stangwenji goto free_conn_ops; 116005a86e78SMike Christie } 116105a86e78SMike Christie 116205a86e78SMike Christie return conn; 116305a86e78SMike Christie 1164f55d0b40Stangwenji free_conn_ops: 1165f55d0b40Stangwenji kfree(conn->conn_ops); 116605a86e78SMike Christie put_transport: 116705a86e78SMike Christie iscsit_put_transport(conn->conn_transport); 116805a86e78SMike Christie free_conn: 116905a86e78SMike Christie kfree(conn); 117005a86e78SMike Christie return NULL; 117105a86e78SMike Christie } 117205a86e78SMike Christie 117305a86e78SMike Christie void iscsit_free_conn(struct iscsi_conn *conn) 117405a86e78SMike Christie { 117505a86e78SMike Christie free_cpumask_var(conn->conn_cpumask); 117605a86e78SMike Christie kfree(conn->conn_ops); 117705a86e78SMike Christie iscsit_put_transport(conn->conn_transport); 117805a86e78SMike Christie kfree(conn); 117905a86e78SMike Christie } 118005a86e78SMike Christie 1181a91eb7d9SNicholas Bellinger void iscsi_target_login_sess_out(struct iscsi_conn *conn, 1182a91eb7d9SNicholas Bellinger struct iscsi_np *np, bool zero_tsih, bool new_sess) 1183a91eb7d9SNicholas Bellinger { 11840bcc297eSChristophe Vu-Brugier if (!new_sess) 1185a91eb7d9SNicholas Bellinger goto old_sess_out; 1186a91eb7d9SNicholas Bellinger 1187a91eb7d9SNicholas Bellinger pr_err("iSCSI Login negotiation failed.\n"); 1188a91eb7d9SNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1189a91eb7d9SNicholas Bellinger ISCSI_LOGIN_STATUS_INIT_ERR); 1190a91eb7d9SNicholas Bellinger if (!zero_tsih || !conn->sess) 1191a91eb7d9SNicholas Bellinger goto old_sess_out; 119226abc916SMike Christie 1193a91eb7d9SNicholas Bellinger transport_free_session(conn->sess->se_sess); 119431ff0ceeSMatthew Wilcox ida_free(&sess_ida, conn->sess->session_index); 1195a91eb7d9SNicholas Bellinger kfree(conn->sess->sess_ops); 1196a91eb7d9SNicholas Bellinger kfree(conn->sess); 1197a0b3b9b2SSagi Grimberg conn->sess = NULL; 1198a91eb7d9SNicholas Bellinger 1199a91eb7d9SNicholas Bellinger old_sess_out: 1200a91eb7d9SNicholas Bellinger iscsi_stop_login_thread_timer(np); 1201a91eb7d9SNicholas Bellinger /* 1202a91eb7d9SNicholas Bellinger * If login negotiation fails check if the Time2Retain timer 1203a91eb7d9SNicholas Bellinger * needs to be restarted. 1204a91eb7d9SNicholas Bellinger */ 1205a91eb7d9SNicholas Bellinger if (!zero_tsih && conn->sess) { 1206a91eb7d9SNicholas Bellinger spin_lock_bh(&conn->sess->conn_lock); 1207a91eb7d9SNicholas Bellinger if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { 1208a91eb7d9SNicholas Bellinger struct se_portal_group *se_tpg = 120960bfcf8eSAndy Grover &conn->tpg->tpg_se_tpg; 1210a91eb7d9SNicholas Bellinger 1211a91eb7d9SNicholas Bellinger atomic_set(&conn->sess->session_continuation, 0); 1212a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1213a91eb7d9SNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 1214a91eb7d9SNicholas Bellinger iscsit_start_time2retain_handler(conn->sess); 1215a91eb7d9SNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 1216a91eb7d9SNicholas Bellinger } else 1217a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1218a91eb7d9SNicholas Bellinger iscsit_dec_session_usage_count(conn->sess); 1219a91eb7d9SNicholas Bellinger } 1220a91eb7d9SNicholas Bellinger 122169110e3cSHerbert Xu ahash_request_free(conn->conn_tx_hash); 122269110e3cSHerbert Xu if (conn->conn_rx_hash) { 122369110e3cSHerbert Xu struct crypto_ahash *tfm; 122469110e3cSHerbert Xu 122569110e3cSHerbert Xu tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); 122669110e3cSHerbert Xu ahash_request_free(conn->conn_rx_hash); 122769110e3cSHerbert Xu crypto_free_ahash(tfm); 122869110e3cSHerbert Xu } 1229a91eb7d9SNicholas Bellinger 1230a91eb7d9SNicholas Bellinger if (conn->param_list) { 1231a91eb7d9SNicholas Bellinger iscsi_release_param_list(conn->param_list); 1232a91eb7d9SNicholas Bellinger conn->param_list = NULL; 1233a91eb7d9SNicholas Bellinger } 1234a91eb7d9SNicholas Bellinger iscsi_target_nego_release(conn); 1235a91eb7d9SNicholas Bellinger 1236a91eb7d9SNicholas Bellinger if (conn->sock) { 1237a91eb7d9SNicholas Bellinger sock_release(conn->sock); 1238a91eb7d9SNicholas Bellinger conn->sock = NULL; 1239a91eb7d9SNicholas Bellinger } 1240a91eb7d9SNicholas Bellinger 1241954f2372SSagi Grimberg if (conn->conn_transport->iscsit_wait_conn) 1242954f2372SSagi Grimberg conn->conn_transport->iscsit_wait_conn(conn); 1243954f2372SSagi Grimberg 1244a91eb7d9SNicholas Bellinger if (conn->conn_transport->iscsit_free_conn) 1245a91eb7d9SNicholas Bellinger conn->conn_transport->iscsit_free_conn(conn); 1246a91eb7d9SNicholas Bellinger 124705a86e78SMike Christie iscsit_free_conn(conn); 1248a91eb7d9SNicholas Bellinger } 1249a91eb7d9SNicholas Bellinger 1250e48354ceSNicholas Bellinger static int __iscsi_target_login_thread(struct iscsi_np *np) 1251e48354ceSNicholas Bellinger { 1252baa4d64bSNicholas Bellinger u8 *buffer, zero_tsih = 0; 125381a9c5e7SMikulas Patocka int ret = 0, rc; 1254e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 1255e48354ceSNicholas Bellinger struct iscsi_login *login; 1256e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = NULL; 1257e48354ceSNicholas Bellinger struct iscsi_login_req *pdu; 1258a91eb7d9SNicholas Bellinger struct iscsi_tpg_np *tpg_np; 1259a91eb7d9SNicholas Bellinger bool new_sess = false; 1260e48354ceSNicholas Bellinger 1261e48354ceSNicholas Bellinger flush_signals(current); 1262e48354ceSNicholas Bellinger 1263e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1264978d13d6SNicholas Bellinger if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { 1265e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1266978d13d6SNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1267e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 1268978d13d6SNicholas Bellinger return 1; 126981a9c5e7SMikulas Patocka } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { 127081a9c5e7SMikulas Patocka spin_unlock_bh(&np->np_thread_lock); 127181a9c5e7SMikulas Patocka goto exit; 1272e48354ceSNicholas Bellinger } else { 1273e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1274e48354ceSNicholas Bellinger } 1275e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1276e48354ceSNicholas Bellinger 127705a86e78SMike Christie conn = iscsit_alloc_conn(np); 1278e48354ceSNicholas Bellinger if (!conn) { 1279e48354ceSNicholas Bellinger /* Get another socket */ 1280e48354ceSNicholas Bellinger return 1; 1281e48354ceSNicholas Bellinger } 1282e48354ceSNicholas Bellinger 1283baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_accept_np(np, conn); 1284baa4d64bSNicholas Bellinger if (rc == -ENOSYS) { 1285baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 128605a86e78SMike Christie iscsit_free_conn(conn); 1287baa4d64bSNicholas Bellinger goto exit; 1288baa4d64bSNicholas Bellinger } else if (rc < 0) { 1289baa4d64bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1290978d13d6SNicholas Bellinger if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { 1291978d13d6SNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1292baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1293baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 129405a86e78SMike Christie iscsit_free_conn(conn); 1295baa4d64bSNicholas Bellinger /* Get another socket */ 1296baa4d64bSNicholas Bellinger return 1; 1297baa4d64bSNicholas Bellinger } 1298baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 129905a86e78SMike Christie iscsit_free_conn(conn); 130005a86e78SMike Christie return 1; 1301e48354ceSNicholas Bellinger } 1302e48354ceSNicholas Bellinger /* 1303e48354ceSNicholas Bellinger * Perform the remaining iSCSI connection initialization items.. 1304e48354ceSNicholas Bellinger */ 1305baa4d64bSNicholas Bellinger login = iscsi_login_init_conn(conn); 1306baa4d64bSNicholas Bellinger if (!login) { 1307e48354ceSNicholas Bellinger goto new_sess_out; 1308e48354ceSNicholas Bellinger } 1309e48354ceSNicholas Bellinger 1310baa4d64bSNicholas Bellinger iscsi_start_login_thread_timer(np); 1311e48354ceSNicholas Bellinger 1312baa4d64bSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); 1313baa4d64bSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_XPT_UP; 1314baa4d64bSNicholas Bellinger /* 1315baa4d64bSNicholas Bellinger * This will process the first login request + payload.. 1316baa4d64bSNicholas Bellinger */ 1317baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_get_login_rx(conn, login); 1318baa4d64bSNicholas Bellinger if (rc == 1) 1319baa4d64bSNicholas Bellinger return 1; 1320baa4d64bSNicholas Bellinger else if (rc < 0) 1321baa4d64bSNicholas Bellinger goto new_sess_out; 1322baa4d64bSNicholas Bellinger 1323baa4d64bSNicholas Bellinger buffer = &login->req[0]; 1324e48354ceSNicholas Bellinger pdu = (struct iscsi_login_req *)buffer; 1325e48354ceSNicholas Bellinger /* 1326e48354ceSNicholas Bellinger * Used by iscsit_tx_login_rsp() for Login Resonses PDUs 1327e48354ceSNicholas Bellinger * when Status-Class != 0. 1328e48354ceSNicholas Bellinger */ 1329e48354ceSNicholas Bellinger conn->login_itt = pdu->itt; 1330e48354ceSNicholas Bellinger 1331e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1332e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 1333e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 133469d75574SAndy Grover pr_err("iSCSI Network Portal on %pISpc currently not" 133569d75574SAndy Grover " active.\n", &np->np_sockaddr); 1336e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1337e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1338e48354ceSNicholas Bellinger goto new_sess_out; 1339e48354ceSNicholas Bellinger } 1340e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger conn->network_transport = np->np_network_transport; 1343e48354ceSNicholas Bellinger 1344dc58f760SAndy Grover pr_debug("Received iSCSI login request from %pISpc on %s Network" 1345dc58f760SAndy Grover " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, 134669d75574SAndy Grover &conn->local_sockaddr); 1347e48354ceSNicholas Bellinger 1348e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); 1349e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGIN; 1350e48354ceSNicholas Bellinger 1351e48354ceSNicholas Bellinger if (iscsi_login_check_initiator_version(conn, pdu->max_version, 1352e48354ceSNicholas Bellinger pdu->min_version) < 0) 1353e48354ceSNicholas Bellinger goto new_sess_out; 1354e48354ceSNicholas Bellinger 1355e48354ceSNicholas Bellinger zero_tsih = (pdu->tsih == 0x0000); 1356ee1b1b9cSAndy Grover if (zero_tsih) { 1357e48354ceSNicholas Bellinger /* 1358e48354ceSNicholas Bellinger * This is the leading connection of a new session. 1359e48354ceSNicholas Bellinger * We wait until after authentication to check for 1360e48354ceSNicholas Bellinger * session reinstatement. 1361e48354ceSNicholas Bellinger */ 1362e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) 1363e48354ceSNicholas Bellinger goto new_sess_out; 1364e48354ceSNicholas Bellinger } else { 1365e48354ceSNicholas Bellinger /* 1366e48354ceSNicholas Bellinger * Add a new connection to an existing session. 1367e48354ceSNicholas Bellinger * We check for a non-existant session in 1368e48354ceSNicholas Bellinger * iscsi_login_non_zero_tsih_s2() below based 1369e48354ceSNicholas Bellinger * on ISID/TSIH, but wait until after authentication 1370e48354ceSNicholas Bellinger * to check for connection reinstatement, etc. 1371e48354ceSNicholas Bellinger */ 1372e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) 1373e48354ceSNicholas Bellinger goto new_sess_out; 1374e48354ceSNicholas Bellinger } 1375e48354ceSNicholas Bellinger /* 1376baa4d64bSNicholas Bellinger * SessionType: Discovery 1377baa4d64bSNicholas Bellinger * 1378baa4d64bSNicholas Bellinger * Locates Default Portal 1379baa4d64bSNicholas Bellinger * 1380baa4d64bSNicholas Bellinger * SessionType: Normal 1381baa4d64bSNicholas Bellinger * 1382baa4d64bSNicholas Bellinger * Locates Target Portal from NP -> Target IQN 1383e48354ceSNicholas Bellinger */ 1384baa4d64bSNicholas Bellinger rc = iscsi_target_locate_portal(np, conn, login); 1385baa4d64bSNicholas Bellinger if (rc < 0) { 1386e48354ceSNicholas Bellinger tpg = conn->tpg; 1387e48354ceSNicholas Bellinger goto new_sess_out; 1388e48354ceSNicholas Bellinger } 1389a91eb7d9SNicholas Bellinger login->zero_tsih = zero_tsih; 1390e48354ceSNicholas Bellinger 13918abc718dSFeng Li if (conn->sess) 139223a548eeSSagi Grimberg conn->sess->se_sess->sup_prot_ops = 139323a548eeSSagi Grimberg conn->conn_transport->iscsit_get_sup_prot_ops(conn); 139423a548eeSSagi Grimberg 1395e48354ceSNicholas Bellinger tpg = conn->tpg; 1396e48354ceSNicholas Bellinger if (!tpg) { 1397e48354ceSNicholas Bellinger pr_err("Unable to locate struct iscsi_conn->tpg\n"); 1398e48354ceSNicholas Bellinger goto new_sess_out; 1399e48354ceSNicholas Bellinger } 1400e48354ceSNicholas Bellinger 1401e48354ceSNicholas Bellinger if (zero_tsih) { 1402baa4d64bSNicholas Bellinger if (iscsi_login_zero_tsih_s2(conn) < 0) 1403e48354ceSNicholas Bellinger goto new_sess_out; 1404e48354ceSNicholas Bellinger } else { 1405baa4d64bSNicholas Bellinger if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) 1406e48354ceSNicholas Bellinger goto old_sess_out; 1407e48354ceSNicholas Bellinger } 1408e48354ceSNicholas Bellinger 140942bc3e57SVarun Prakash if (conn->conn_transport->iscsit_validate_params) { 141042bc3e57SVarun Prakash ret = conn->conn_transport->iscsit_validate_params(conn); 141142bc3e57SVarun Prakash if (ret < 0) { 141242bc3e57SVarun Prakash if (zero_tsih) 141342bc3e57SVarun Prakash goto new_sess_out; 141442bc3e57SVarun Prakash else 141542bc3e57SVarun Prakash goto old_sess_out; 141642bc3e57SVarun Prakash } 141742bc3e57SVarun Prakash } 141842bc3e57SVarun Prakash 1419a91eb7d9SNicholas Bellinger ret = iscsi_target_start_negotiation(login, conn); 1420a91eb7d9SNicholas Bellinger if (ret < 0) 1421e48354ceSNicholas Bellinger goto new_sess_out; 1422e48354ceSNicholas Bellinger 1423e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1424e48354ceSNicholas Bellinger 1425a91eb7d9SNicholas Bellinger if (ret == 1) { 1426a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1427e48354ceSNicholas Bellinger 1428e5419865SNicholas Bellinger iscsi_post_login_handler(np, conn, zero_tsih); 1429a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1430a91eb7d9SNicholas Bellinger } 1431a91eb7d9SNicholas Bellinger 1432e48354ceSNicholas Bellinger tpg = NULL; 1433a91eb7d9SNicholas Bellinger tpg_np = NULL; 1434e48354ceSNicholas Bellinger /* Get another socket */ 1435e48354ceSNicholas Bellinger return 1; 1436e48354ceSNicholas Bellinger 1437e48354ceSNicholas Bellinger new_sess_out: 1438a91eb7d9SNicholas Bellinger new_sess = true; 1439e48354ceSNicholas Bellinger old_sess_out: 1440a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1441a91eb7d9SNicholas Bellinger iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); 1442a91eb7d9SNicholas Bellinger new_sess = false; 1443e48354ceSNicholas Bellinger 1444e48354ceSNicholas Bellinger if (tpg) { 1445a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1446e48354ceSNicholas Bellinger tpg = NULL; 1447a91eb7d9SNicholas Bellinger tpg_np = NULL; 1448e48354ceSNicholas Bellinger } 1449e48354ceSNicholas Bellinger 1450e48354ceSNicholas Bellinger return 1; 145181a9c5e7SMikulas Patocka 1452baa4d64bSNicholas Bellinger exit: 1453e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1454e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1455e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_EXIT; 1456e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1457baa4d64bSNicholas Bellinger 1458e48354ceSNicholas Bellinger return 0; 1459e48354ceSNicholas Bellinger } 1460e48354ceSNicholas Bellinger 1461e48354ceSNicholas Bellinger int iscsi_target_login_thread(void *arg) 1462e48354ceSNicholas Bellinger { 14638359cf43SJörn Engel struct iscsi_np *np = arg; 1464e48354ceSNicholas Bellinger int ret; 1465e48354ceSNicholas Bellinger 1466e48354ceSNicholas Bellinger allow_signal(SIGINT); 1467e48354ceSNicholas Bellinger 146881a9c5e7SMikulas Patocka while (1) { 1469e48354ceSNicholas Bellinger ret = __iscsi_target_login_thread(np); 1470e48354ceSNicholas Bellinger /* 1471e48354ceSNicholas Bellinger * We break and exit here unless another sock_accept() call 1472e48354ceSNicholas Bellinger * is expected. 1473e48354ceSNicholas Bellinger */ 1474e48354ceSNicholas Bellinger if (ret != 1) 1475e48354ceSNicholas Bellinger break; 1476e48354ceSNicholas Bellinger } 1477e48354ceSNicholas Bellinger 14785e0cf5e6SJiang Yi while (!kthread_should_stop()) { 14795e0cf5e6SJiang Yi msleep(100); 14805e0cf5e6SJiang Yi } 14815e0cf5e6SJiang Yi 1482e48354ceSNicholas Bellinger return 0; 1483e48354ceSNicholas Bellinger } 1484