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_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); 71baa4d64bSNicholas Bellinger if (!conn->conn_ops) { 72baa4d64bSNicholas Bellinger pr_err("Unable to allocate memory for" 73baa4d64bSNicholas Bellinger " struct iscsi_conn_ops.\n"); 74baa4d64bSNicholas Bellinger goto out_rsp_buf; 75baa4d64bSNicholas Bellinger } 76baa4d64bSNicholas Bellinger 77d5627acbSRoland Dreier init_waitqueue_head(&conn->queues_wq); 78e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_list); 79e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->conn_cmd_list); 80e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->immed_queue_list); 81e48354ceSNicholas Bellinger INIT_LIST_HEAD(&conn->response_queue_list); 82e48354ceSNicholas Bellinger init_completion(&conn->conn_post_wait_comp); 83e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_comp); 84e48354ceSNicholas Bellinger init_completion(&conn->conn_wait_rcfr_comp); 85e48354ceSNicholas Bellinger init_completion(&conn->conn_waiting_on_uc_comp); 86e48354ceSNicholas Bellinger init_completion(&conn->conn_logout_comp); 87e48354ceSNicholas Bellinger init_completion(&conn->rx_half_close_comp); 88e48354ceSNicholas Bellinger init_completion(&conn->tx_half_close_comp); 89e5419865SNicholas Bellinger init_completion(&conn->rx_login_comp); 90e48354ceSNicholas Bellinger spin_lock_init(&conn->cmd_lock); 91e48354ceSNicholas Bellinger spin_lock_init(&conn->conn_usage_lock); 92e48354ceSNicholas Bellinger spin_lock_init(&conn->immed_queue_lock); 93e48354ceSNicholas Bellinger spin_lock_init(&conn->nopin_timer_lock); 94e48354ceSNicholas Bellinger spin_lock_init(&conn->response_queue_lock); 95e48354ceSNicholas Bellinger spin_lock_init(&conn->state_lock); 96e48354ceSNicholas Bellinger 97e48354ceSNicholas Bellinger if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { 98e48354ceSNicholas Bellinger pr_err("Unable to allocate conn->conn_cpumask\n"); 99baa4d64bSNicholas Bellinger goto out_conn_ops; 100e48354ceSNicholas Bellinger } 101baa4d64bSNicholas Bellinger conn->conn_login = login; 102e48354ceSNicholas Bellinger 103baa4d64bSNicholas Bellinger return login; 104baa4d64bSNicholas Bellinger 105baa4d64bSNicholas Bellinger out_conn_ops: 106baa4d64bSNicholas Bellinger kfree(conn->conn_ops); 107baa4d64bSNicholas Bellinger out_rsp_buf: 108baa4d64bSNicholas Bellinger kfree(login->rsp_buf); 109baa4d64bSNicholas Bellinger out_req_buf: 110baa4d64bSNicholas Bellinger kfree(login->req_buf); 111baa4d64bSNicholas Bellinger out_login: 112baa4d64bSNicholas Bellinger kfree(login); 113baa4d64bSNicholas Bellinger return NULL; 114e48354ceSNicholas Bellinger } 115e48354ceSNicholas Bellinger 116e48354ceSNicholas Bellinger /* 117e48354ceSNicholas Bellinger * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup 118e48354ceSNicholas Bellinger * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel 119e48354ceSNicholas Bellinger */ 120e48354ceSNicholas Bellinger int iscsi_login_setup_crypto(struct iscsi_conn *conn) 121e48354ceSNicholas Bellinger { 12269110e3cSHerbert Xu struct crypto_ahash *tfm; 12369110e3cSHerbert Xu 124e48354ceSNicholas Bellinger /* 125e48354ceSNicholas Bellinger * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts 126e48354ceSNicholas Bellinger * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback 127e48354ceSNicholas Bellinger * to software 1x8 byte slicing from crc32c.ko 128e48354ceSNicholas Bellinger */ 12969110e3cSHerbert Xu tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); 13069110e3cSHerbert Xu if (IS_ERR(tfm)) { 13169110e3cSHerbert Xu pr_err("crypto_alloc_ahash() failed\n"); 132e48354ceSNicholas Bellinger return -ENOMEM; 133e48354ceSNicholas Bellinger } 134e48354ceSNicholas Bellinger 13569110e3cSHerbert Xu conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL); 13669110e3cSHerbert Xu if (!conn->conn_rx_hash) { 13769110e3cSHerbert Xu pr_err("ahash_request_alloc() failed for conn_rx_hash\n"); 13869110e3cSHerbert Xu crypto_free_ahash(tfm); 139e48354ceSNicholas Bellinger return -ENOMEM; 140e48354ceSNicholas Bellinger } 14169110e3cSHerbert Xu ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL); 14269110e3cSHerbert Xu 14369110e3cSHerbert Xu conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL); 14469110e3cSHerbert Xu if (!conn->conn_tx_hash) { 14569110e3cSHerbert Xu pr_err("ahash_request_alloc() failed for conn_tx_hash\n"); 14669110e3cSHerbert Xu ahash_request_free(conn->conn_rx_hash); 14769110e3cSHerbert Xu conn->conn_rx_hash = NULL; 14869110e3cSHerbert Xu crypto_free_ahash(tfm); 14969110e3cSHerbert Xu return -ENOMEM; 15069110e3cSHerbert Xu } 15169110e3cSHerbert Xu ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL); 152e48354ceSNicholas Bellinger 153e48354ceSNicholas Bellinger return 0; 154e48354ceSNicholas Bellinger } 155e48354ceSNicholas Bellinger 156e48354ceSNicholas Bellinger static int iscsi_login_check_initiator_version( 157e48354ceSNicholas Bellinger struct iscsi_conn *conn, 158e48354ceSNicholas Bellinger u8 version_max, 159e48354ceSNicholas Bellinger u8 version_min) 160e48354ceSNicholas Bellinger { 161e48354ceSNicholas Bellinger if ((version_max != 0x00) || (version_min != 0x00)) { 162e48354ceSNicholas Bellinger pr_err("Unsupported iSCSI IETF Pre-RFC Revision," 163e48354ceSNicholas Bellinger " version Min/Max 0x%02x/0x%02x, rejecting login.\n", 164e48354ceSNicholas Bellinger version_min, version_max); 165e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 166e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_VERSION); 167e48354ceSNicholas Bellinger return -1; 168e48354ceSNicholas Bellinger } 169e48354ceSNicholas Bellinger 170e48354ceSNicholas Bellinger return 0; 171e48354ceSNicholas Bellinger } 172e48354ceSNicholas Bellinger 173e48354ceSNicholas Bellinger int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) 174e48354ceSNicholas Bellinger { 175e48354ceSNicholas Bellinger int sessiontype; 176e48354ceSNicholas Bellinger struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; 177e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 178e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 179e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 180e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 181e48354ceSNicholas Bellinger 182e48354ceSNicholas Bellinger initiatorname_param = iscsi_find_param_from_key( 183e48354ceSNicholas Bellinger INITIATORNAME, conn->param_list); 184e48354ceSNicholas Bellinger sessiontype_param = iscsi_find_param_from_key( 185e48354ceSNicholas Bellinger SESSIONTYPE, conn->param_list); 1861c5c12c6SRoland Dreier if (!initiatorname_param || !sessiontype_param) { 1871c5c12c6SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1881c5c12c6SRoland Dreier ISCSI_LOGIN_STATUS_MISSING_FIELDS); 189e48354ceSNicholas Bellinger return -1; 1901c5c12c6SRoland Dreier } 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; 193e48354ceSNicholas Bellinger 194e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 195e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 196e48354ceSNicholas Bellinger sess_list) { 197e48354ceSNicholas Bellinger 1988359cf43SJörn Engel sess_p = se_sess->fabric_sess_ptr; 199e48354ceSNicholas Bellinger spin_lock(&sess_p->conn_lock); 200e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 201e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 202e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 203e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 204e48354ceSNicholas Bellinger continue; 205e48354ceSNicholas Bellinger } 2068359cf43SJörn Engel if (!memcmp(sess_p->isid, conn->sess->isid, 6) && 2078359cf43SJörn Engel (!strcmp(sess_p->sess_ops->InitiatorName, 2088359cf43SJörn Engel initiatorname_param->value) && 209e48354ceSNicholas Bellinger (sess_p->sess_ops->SessionType == sessiontype))) { 210e48354ceSNicholas Bellinger atomic_set(&sess_p->session_reinstatement, 1); 211197b806aSNicholas Bellinger atomic_set(&sess_p->session_fall_back_to_erl0, 1); 212e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 213e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 214e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 215e48354ceSNicholas Bellinger sess = sess_p; 216e48354ceSNicholas Bellinger break; 217e48354ceSNicholas Bellinger } 218e48354ceSNicholas Bellinger spin_unlock(&sess_p->conn_lock); 219e48354ceSNicholas Bellinger } 220e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 221e48354ceSNicholas Bellinger /* 222e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 223e48354ceSNicholas Bellinger */ 224e48354ceSNicholas Bellinger if (!sess) 225e48354ceSNicholas Bellinger return 0; 226e48354ceSNicholas Bellinger 227e48354ceSNicholas Bellinger pr_debug("%s iSCSI Session SID %u is still active for %s," 2280d5efb8aSBart Van Assche " performing session reinstatement.\n", (sessiontype) ? 229e48354ceSNicholas Bellinger "Discovery" : "Normal", sess->sid, 230e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 231e48354ceSNicholas Bellinger 232e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 233e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 234e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 235e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 23644f33d0fSChristoph Hellwig iscsit_close_session(sess); 23799367f01SNicholas Bellinger return 0; 238e48354ceSNicholas Bellinger } 239e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 240e48354ceSNicholas Bellinger 241e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 242e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 243e48354ceSNicholas Bellinger 24444f33d0fSChristoph Hellwig iscsit_close_session(sess); 24599367f01SNicholas Bellinger return 0; 246e48354ceSNicholas Bellinger } 247e48354ceSNicholas Bellinger 2486787ab81SJason A. Donenfeld static int iscsi_login_set_conn_values( 249e48354ceSNicholas Bellinger struct iscsi_session *sess, 250e48354ceSNicholas Bellinger struct iscsi_conn *conn, 25150e5c87dSChristoph Hellwig __be16 cid) 252e48354ceSNicholas Bellinger { 2536787ab81SJason A. Donenfeld int ret; 254e48354ceSNicholas Bellinger conn->sess = sess; 25550e5c87dSChristoph Hellwig conn->cid = be16_to_cpu(cid); 256e48354ceSNicholas Bellinger /* 257e48354ceSNicholas Bellinger * Generate a random Status sequence number (statsn) for the new 258e48354ceSNicholas Bellinger * iSCSI connection. 259e48354ceSNicholas Bellinger */ 2606787ab81SJason A. Donenfeld ret = get_random_bytes_wait(&conn->stat_sn, sizeof(u32)); 2616787ab81SJason A. Donenfeld if (unlikely(ret)) 2626787ab81SJason A. Donenfeld return ret; 263e48354ceSNicholas Bellinger 264e48354ceSNicholas Bellinger mutex_lock(&auth_id_lock); 265e48354ceSNicholas Bellinger conn->auth_id = iscsit_global->auth_id++; 266e48354ceSNicholas Bellinger mutex_unlock(&auth_id_lock); 2676787ab81SJason A. Donenfeld return 0; 268e48354ceSNicholas Bellinger } 269e48354ceSNicholas Bellinger 270d2faaefbSVarun Prakash __printf(2, 3) int iscsi_change_param_sprintf( 27179d59d08SRoland Dreier struct iscsi_conn *conn, 27279d59d08SRoland Dreier const char *fmt, ...) 27379d59d08SRoland Dreier { 27479d59d08SRoland Dreier va_list args; 27579d59d08SRoland Dreier unsigned char buf[64]; 27679d59d08SRoland Dreier 27779d59d08SRoland Dreier memset(buf, 0, sizeof buf); 27879d59d08SRoland Dreier 27979d59d08SRoland Dreier va_start(args, fmt); 28079d59d08SRoland Dreier vsnprintf(buf, sizeof buf, fmt, args); 28179d59d08SRoland Dreier va_end(args); 28279d59d08SRoland Dreier 28379d59d08SRoland Dreier if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { 28479d59d08SRoland Dreier iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 28579d59d08SRoland Dreier ISCSI_LOGIN_STATUS_NO_RESOURCES); 28679d59d08SRoland Dreier return -1; 28779d59d08SRoland Dreier } 28879d59d08SRoland Dreier 28979d59d08SRoland Dreier return 0; 29079d59d08SRoland Dreier } 291d2faaefbSVarun Prakash EXPORT_SYMBOL(iscsi_change_param_sprintf); 29279d59d08SRoland Dreier 293e48354ceSNicholas Bellinger /* 294e48354ceSNicholas Bellinger * This is the leading connection of a new session, 295e48354ceSNicholas Bellinger * or session reinstatement. 296e48354ceSNicholas Bellinger */ 297e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s1( 298e48354ceSNicholas Bellinger struct iscsi_conn *conn, 299e48354ceSNicholas Bellinger unsigned char *buf) 300e48354ceSNicholas Bellinger { 301e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL; 302e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 30313b5533aSBenjamin Wang int ret; 304e48354ceSNicholas Bellinger 305e48354ceSNicholas Bellinger sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); 306e48354ceSNicholas Bellinger if (!sess) { 307e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 308e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 309e48354ceSNicholas Bellinger pr_err("Could not allocate memory for session\n"); 3100957627aSNicholas Bellinger return -ENOMEM; 311e48354ceSNicholas Bellinger } 312e48354ceSNicholas Bellinger 3136787ab81SJason A. Donenfeld ret = iscsi_login_set_conn_values(sess, conn, pdu->cid); 3146787ab81SJason A. Donenfeld if (unlikely(ret)) { 3156787ab81SJason A. Donenfeld kfree(sess); 3166787ab81SJason A. Donenfeld return ret; 3176787ab81SJason A. Donenfeld } 318e48354ceSNicholas Bellinger sess->init_task_tag = pdu->itt; 3198359cf43SJörn Engel memcpy(&sess->isid, pdu->isid, 6); 32050e5c87dSChristoph Hellwig sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); 321e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_conn_list); 322e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); 323e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_active_list); 324e48354ceSNicholas Bellinger INIT_LIST_HEAD(&sess->cr_inactive_list); 325e48354ceSNicholas Bellinger init_completion(&sess->async_msg_comp); 326e48354ceSNicholas Bellinger init_completion(&sess->reinstatement_comp); 327e48354ceSNicholas Bellinger init_completion(&sess->session_wait_comp); 328e48354ceSNicholas Bellinger init_completion(&sess->session_waiting_on_uc_comp); 329e48354ceSNicholas Bellinger mutex_init(&sess->cmdsn_mutex); 330e48354ceSNicholas Bellinger spin_lock_init(&sess->conn_lock); 331e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_a_lock); 332e48354ceSNicholas Bellinger spin_lock_init(&sess->cr_i_lock); 333e48354ceSNicholas Bellinger spin_lock_init(&sess->session_usage_lock); 334e48354ceSNicholas Bellinger spin_lock_init(&sess->ttt_lock); 335e48354ceSNicholas Bellinger 336f7c9564aSKees Cook timer_setup(&sess->time2retain_timer, 337f7c9564aSKees Cook iscsit_handle_time2retain_timeout, 0); 3388a47aa9dSBart Van Assche 33931ff0ceeSMatthew Wilcox ret = ida_alloc(&sess_ida, GFP_KERNEL); 34013b5533aSBenjamin Wang if (ret < 0) { 34131ff0ceeSMatthew Wilcox pr_err("Session ID allocation failed %d\n", ret); 34213b5533aSBenjamin Wang iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 34313b5533aSBenjamin Wang ISCSI_LOGIN_STATUS_NO_RESOURCES); 34426abc916SMike Christie goto free_sess; 34513b5533aSBenjamin Wang } 34613b5533aSBenjamin Wang 34731ff0ceeSMatthew Wilcox sess->session_index = ret; 348e48354ceSNicholas Bellinger sess->creation_time = get_jiffies_64(); 349e48354ceSNicholas Bellinger /* 350e48354ceSNicholas Bellinger * The FFP CmdSN window values will be allocated from the TPG's 351e48354ceSNicholas Bellinger * Initiator Node's ACL once the login has been successfully completed. 352e48354ceSNicholas Bellinger */ 353109e2381SRoland Dreier atomic_set(&sess->max_cmd_sn, be32_to_cpu(pdu->cmdsn)); 354e48354ceSNicholas Bellinger 355e48354ceSNicholas Bellinger sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); 356e48354ceSNicholas Bellinger if (!sess->sess_ops) { 357e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 358e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 359e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 360e48354ceSNicholas Bellinger " struct iscsi_sess_ops.\n"); 36131ff0ceeSMatthew Wilcox goto free_id; 362e48354ceSNicholas Bellinger } 363e48354ceSNicholas Bellinger 36423a548eeSSagi Grimberg sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); 3650957627aSNicholas Bellinger if (IS_ERR(sess->se_sess)) { 366e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 367e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 36826abc916SMike Christie goto free_ops; 369e48354ceSNicholas Bellinger } 370e48354ceSNicholas Bellinger 371e48354ceSNicholas Bellinger return 0; 37226abc916SMike Christie 37326abc916SMike Christie free_ops: 37426abc916SMike Christie kfree(sess->sess_ops); 37531ff0ceeSMatthew Wilcox free_id: 37631ff0ceeSMatthew Wilcox ida_free(&sess_ida, sess->session_index); 37726abc916SMike Christie free_sess: 37826abc916SMike Christie kfree(sess); 37926abc916SMike Christie conn->sess = NULL; 38026abc916SMike Christie return -ENOMEM; 381e48354ceSNicholas Bellinger } 382e48354ceSNicholas Bellinger 383e48354ceSNicholas Bellinger static int iscsi_login_zero_tsih_s2( 384e48354ceSNicholas Bellinger struct iscsi_conn *conn) 385e48354ceSNicholas Bellinger { 386e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 387e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 38803aa2070SNicholas Bellinger bool iser = false; 389e48354ceSNicholas Bellinger 390e48354ceSNicholas Bellinger sess->tpg = conn->tpg; 391e48354ceSNicholas Bellinger 392e48354ceSNicholas Bellinger /* 393e48354ceSNicholas Bellinger * Assign a new TPG Session Handle. Note this is protected with 394e48354ceSNicholas Bellinger * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). 395e48354ceSNicholas Bellinger */ 39660bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 397e48354ceSNicholas Bellinger if (!sess->tsih) 39860bfcf8eSAndy Grover sess->tsih = ++sess->tpg->ntsih; 399e48354ceSNicholas Bellinger 400e48354ceSNicholas Bellinger /* 401e48354ceSNicholas Bellinger * Create the default params from user defined values.. 402e48354ceSNicholas Bellinger */ 403e48354ceSNicholas Bellinger if (iscsi_copy_param_list(&conn->param_list, 40460bfcf8eSAndy Grover conn->tpg->param_list, 1) < 0) { 405e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 406e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 407e48354ceSNicholas Bellinger return -1; 408e48354ceSNicholas Bellinger } 409e48354ceSNicholas Bellinger 41003aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 41103aa2070SNicholas Bellinger iser = true; 41203aa2070SNicholas Bellinger 41303aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger if (sess->sess_ops->SessionType) 416e48354ceSNicholas Bellinger return iscsi_set_keys_irrelevant_for_discovery( 417e48354ceSNicholas Bellinger conn->param_list); 418e48354ceSNicholas Bellinger 419e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 420e48354ceSNicholas Bellinger 421e48354ceSNicholas Bellinger /* 422e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 423e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 424e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 425e48354ceSNicholas Bellinger * 426e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 427e48354ceSNicholas Bellinger */ 42879d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 429e48354ceSNicholas Bellinger return -1; 430e48354ceSNicholas Bellinger 431e48354ceSNicholas Bellinger /* 432e48354ceSNicholas Bellinger * Workaround for Initiators that have broken connection recovery logic. 433e48354ceSNicholas Bellinger * 434e48354ceSNicholas Bellinger * "We would really like to get rid of this." Linux-iSCSI.org team 435e48354ceSNicholas Bellinger */ 43679d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl)) 437e48354ceSNicholas Bellinger return -1; 438e48354ceSNicholas Bellinger 43903aa2070SNicholas Bellinger /* 44003aa2070SNicholas Bellinger * Set RDMAExtensions=Yes by default for iSER enabled network portals 44103aa2070SNicholas Bellinger */ 44203aa2070SNicholas Bellinger if (iser) { 44303aa2070SNicholas Bellinger struct iscsi_param *param; 44403aa2070SNicholas Bellinger unsigned long mrdsl, off; 44503aa2070SNicholas Bellinger int rc; 44603aa2070SNicholas Bellinger 44779d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes")) 44803aa2070SNicholas Bellinger return -1; 44979d59d08SRoland Dreier 45003aa2070SNicholas Bellinger /* 45103aa2070SNicholas Bellinger * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for 4523fc6a642SColin Ian King * Immediate Data + Unsolicited Data-OUT if necessary.. 45303aa2070SNicholas Bellinger */ 45403aa2070SNicholas Bellinger param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", 45503aa2070SNicholas Bellinger conn->param_list); 45603aa2070SNicholas Bellinger if (!param) { 45703aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 45803aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 45903aa2070SNicholas Bellinger return -1; 46003aa2070SNicholas Bellinger } 46157103d7fSJingoo Han rc = kstrtoul(param->value, 0, &mrdsl); 46203aa2070SNicholas Bellinger if (rc < 0) { 46303aa2070SNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 46403aa2070SNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 46503aa2070SNicholas Bellinger return -1; 46603aa2070SNicholas Bellinger } 46703aa2070SNicholas Bellinger off = mrdsl % PAGE_SIZE; 46803aa2070SNicholas Bellinger if (!off) 46952d0aa79SNicholas Bellinger goto check_prot; 47003aa2070SNicholas Bellinger 47103aa2070SNicholas Bellinger if (mrdsl < PAGE_SIZE) 47203aa2070SNicholas Bellinger mrdsl = PAGE_SIZE; 47303aa2070SNicholas Bellinger else 47403aa2070SNicholas Bellinger mrdsl -= off; 47503aa2070SNicholas Bellinger 47603aa2070SNicholas Bellinger pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" 47703aa2070SNicholas Bellinger " to PAGE_SIZE\n", mrdsl); 47803aa2070SNicholas Bellinger 47979d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl)) 48003aa2070SNicholas Bellinger return -1; 48152d0aa79SNicholas Bellinger /* 48252d0aa79SNicholas Bellinger * ISER currently requires that ImmediateData + Unsolicited 48352d0aa79SNicholas Bellinger * Data be disabled when protection / signature MRs are enabled. 48452d0aa79SNicholas Bellinger */ 48552d0aa79SNicholas Bellinger check_prot: 48652d0aa79SNicholas Bellinger if (sess->se_sess->sup_prot_ops & 48752d0aa79SNicholas Bellinger (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS | 48852d0aa79SNicholas Bellinger TARGET_PROT_DOUT_INSERT)) { 48952d0aa79SNicholas Bellinger 49079d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "ImmediateData=No")) 49152d0aa79SNicholas Bellinger return -1; 49252d0aa79SNicholas Bellinger 49379d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes")) 49452d0aa79SNicholas Bellinger return -1; 49579d59d08SRoland Dreier 49652d0aa79SNicholas Bellinger pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for" 49752d0aa79SNicholas Bellinger " T10-PI enabled ISER session\n"); 49852d0aa79SNicholas Bellinger } 49903aa2070SNicholas Bellinger } 500e48354ceSNicholas Bellinger 501e48354ceSNicholas Bellinger return 0; 502e48354ceSNicholas Bellinger } 503e48354ceSNicholas Bellinger 504e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s1( 505e48354ceSNicholas Bellinger struct iscsi_conn *conn, 506e48354ceSNicholas Bellinger unsigned char *buf) 507e48354ceSNicholas Bellinger { 508e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 509e48354ceSNicholas Bellinger 5106787ab81SJason A. Donenfeld return iscsi_login_set_conn_values(NULL, conn, pdu->cid); 511e48354ceSNicholas Bellinger } 512e48354ceSNicholas Bellinger 513e48354ceSNicholas Bellinger /* 514e48354ceSNicholas Bellinger * Add a new connection to an existing session. 515e48354ceSNicholas Bellinger */ 516e48354ceSNicholas Bellinger static int iscsi_login_non_zero_tsih_s2( 517e48354ceSNicholas Bellinger struct iscsi_conn *conn, 518e48354ceSNicholas Bellinger unsigned char *buf) 519e48354ceSNicholas Bellinger { 520e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->tpg; 521e48354ceSNicholas Bellinger struct iscsi_session *sess = NULL, *sess_p = NULL; 522e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 523e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 524e48354ceSNicholas Bellinger struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; 52503aa2070SNicholas Bellinger bool iser = false; 526e48354ceSNicholas Bellinger 527e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 528e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 529e48354ceSNicholas Bellinger sess_list) { 530e48354ceSNicholas Bellinger 531e48354ceSNicholas Bellinger sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; 532e48354ceSNicholas Bellinger if (atomic_read(&sess_p->session_fall_back_to_erl0) || 533e48354ceSNicholas Bellinger atomic_read(&sess_p->session_logout) || 534e48354ceSNicholas Bellinger (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) 535e48354ceSNicholas Bellinger continue; 5368359cf43SJörn Engel if (!memcmp(sess_p->isid, pdu->isid, 6) && 53750e5c87dSChristoph Hellwig (sess_p->tsih == be16_to_cpu(pdu->tsih))) { 538e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess_p); 539e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess_p); 540e48354ceSNicholas Bellinger sess = sess_p; 541e48354ceSNicholas Bellinger break; 542e48354ceSNicholas Bellinger } 543e48354ceSNicholas Bellinger } 544e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 545e48354ceSNicholas Bellinger 546e48354ceSNicholas Bellinger /* 547e48354ceSNicholas Bellinger * If the Time2Retain handler has expired, the session is already gone. 548e48354ceSNicholas Bellinger */ 549e48354ceSNicholas Bellinger if (!sess) { 550e48354ceSNicholas Bellinger pr_err("Initiator attempting to add a connection to" 551e48354ceSNicholas Bellinger " a non-existent session, rejecting iSCSI Login.\n"); 552e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 553e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_SESSION); 554e48354ceSNicholas Bellinger return -1; 555e48354ceSNicholas Bellinger } 556e48354ceSNicholas Bellinger 557e48354ceSNicholas Bellinger /* 558e48354ceSNicholas Bellinger * Stop the Time2Retain timer if this is a failed session, we restart 559e48354ceSNicholas Bellinger * the timer if the login is not successful. 560e48354ceSNicholas Bellinger */ 561e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 562e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) 563e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 1); 564e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 565e48354ceSNicholas Bellinger 5666787ab81SJason A. Donenfeld if (iscsi_login_set_conn_values(sess, conn, pdu->cid) < 0 || 5676787ab81SJason A. Donenfeld iscsi_copy_param_list(&conn->param_list, 56860bfcf8eSAndy Grover conn->tpg->param_list, 0) < 0) { 569e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 570e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_NO_RESOURCES); 571e48354ceSNicholas Bellinger return -1; 572e48354ceSNicholas Bellinger } 573e48354ceSNicholas Bellinger 57403aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 57503aa2070SNicholas Bellinger iser = true; 57603aa2070SNicholas Bellinger 57703aa2070SNicholas Bellinger iscsi_set_keys_to_negotiate(conn->param_list, iser); 578e48354ceSNicholas Bellinger /* 579e48354ceSNicholas Bellinger * Need to send TargetPortalGroupTag back in first login response 580e48354ceSNicholas Bellinger * on any iSCSI connection where the Initiator provides TargetName. 581e48354ceSNicholas Bellinger * See 5.3.1. Login Phase Start 582e48354ceSNicholas Bellinger * 583e48354ceSNicholas Bellinger * In our case, we have already located the struct iscsi_tiqn at this point. 584e48354ceSNicholas Bellinger */ 58579d59d08SRoland Dreier if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt)) 586e48354ceSNicholas Bellinger return -1; 587e48354ceSNicholas Bellinger 588c04a6091SChristophe Vu-Brugier return 0; 589e48354ceSNicholas Bellinger } 590e48354ceSNicholas Bellinger 591e48354ceSNicholas Bellinger int iscsi_login_post_auth_non_zero_tsih( 592e48354ceSNicholas Bellinger struct iscsi_conn *conn, 593e48354ceSNicholas Bellinger u16 cid, 594e48354ceSNicholas Bellinger u32 exp_statsn) 595e48354ceSNicholas Bellinger { 596e48354ceSNicholas Bellinger struct iscsi_conn *conn_ptr = NULL; 597e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 598e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 599e48354ceSNicholas Bellinger 600e48354ceSNicholas Bellinger /* 601e48354ceSNicholas Bellinger * By following item 5 in the login table, if we have found 602e48354ceSNicholas Bellinger * an existing ISID and a valid/existing TSIH and an existing 603e48354ceSNicholas Bellinger * CID we do connection reinstatement. Currently we dont not 604e48354ceSNicholas Bellinger * support it so we send back an non-zero status class to the 605e48354ceSNicholas Bellinger * initiator and release the new connection. 606e48354ceSNicholas Bellinger */ 607e48354ceSNicholas Bellinger conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); 608ee1b1b9cSAndy Grover if (conn_ptr) { 609e48354ceSNicholas Bellinger pr_err("Connection exists with CID %hu for %s," 610e48354ceSNicholas Bellinger " performing connection reinstatement.\n", 611e48354ceSNicholas Bellinger conn_ptr->cid, sess->sess_ops->InitiatorName); 612e48354ceSNicholas Bellinger 613e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(conn_ptr); 614e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_ptr); 615e48354ceSNicholas Bellinger } 616e48354ceSNicholas Bellinger 617e48354ceSNicholas Bellinger /* 618e48354ceSNicholas Bellinger * Check for any connection recovery entires containing CID. 619e48354ceSNicholas Bellinger * We use the original ExpStatSN sent in the first login request 620e48354ceSNicholas Bellinger * to acknowledge commands for the failed connection. 621e48354ceSNicholas Bellinger * 622e48354ceSNicholas Bellinger * Also note that an explict logout may have already been sent, 623e48354ceSNicholas Bellinger * but the response may not be sent due to additional connection 624e48354ceSNicholas Bellinger * loss. 625e48354ceSNicholas Bellinger */ 626e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) { 627e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 628e48354ceSNicholas Bellinger sess, cid); 629ee1b1b9cSAndy Grover if (cr) { 630e48354ceSNicholas Bellinger pr_debug("Performing implicit logout" 631e48354ceSNicholas Bellinger " for connection recovery on CID: %hu\n", 632e48354ceSNicholas Bellinger conn->cid); 633e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); 634e48354ceSNicholas Bellinger } 635e48354ceSNicholas Bellinger } 636e48354ceSNicholas Bellinger 637e48354ceSNicholas Bellinger /* 638e48354ceSNicholas Bellinger * Else we follow item 4 from the login table in that we have 639e48354ceSNicholas Bellinger * found an existing ISID and a valid/existing TSIH and a new 640e48354ceSNicholas Bellinger * CID we go ahead and continue to add a new connection to the 641e48354ceSNicholas Bellinger * session. 642e48354ceSNicholas Bellinger */ 643e48354ceSNicholas Bellinger pr_debug("Adding CID %hu to existing session for %s.\n", 644e48354ceSNicholas Bellinger cid, sess->sess_ops->InitiatorName); 645e48354ceSNicholas Bellinger 646e48354ceSNicholas Bellinger if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { 647e48354ceSNicholas Bellinger pr_err("Adding additional connection to this session" 648e48354ceSNicholas Bellinger " would exceed MaxConnections %d, login failed.\n", 649e48354ceSNicholas Bellinger sess->sess_ops->MaxConnections); 650e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 651e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ISID_ERROR); 652e48354ceSNicholas Bellinger return -1; 653e48354ceSNicholas Bellinger } 654e48354ceSNicholas Bellinger 655e48354ceSNicholas Bellinger return 0; 656e48354ceSNicholas Bellinger } 657e48354ceSNicholas Bellinger 658e48354ceSNicholas Bellinger static void iscsi_post_login_start_timers(struct iscsi_conn *conn) 659e48354ceSNicholas Bellinger { 660e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 66103aa2070SNicholas Bellinger /* 6623fc6a642SColin Ian King * FIXME: Unsolicited NopIN support for ISER 66303aa2070SNicholas Bellinger */ 66403aa2070SNicholas Bellinger if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) 66503aa2070SNicholas Bellinger return; 666e48354ceSNicholas Bellinger 667e48354ceSNicholas Bellinger if (!sess->sess_ops->SessionType) 668e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 669e48354ceSNicholas Bellinger } 670e48354ceSNicholas Bellinger 671e5419865SNicholas Bellinger int iscsit_start_kthreads(struct iscsi_conn *conn) 67288dcd2daSNicholas Bellinger { 67388dcd2daSNicholas Bellinger int ret = 0; 67488dcd2daSNicholas Bellinger 67588dcd2daSNicholas Bellinger spin_lock(&iscsit_global->ts_bitmap_lock); 67688dcd2daSNicholas Bellinger conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap, 67788dcd2daSNicholas Bellinger ISCSIT_BITMAP_BITS, get_order(1)); 67888dcd2daSNicholas Bellinger spin_unlock(&iscsit_global->ts_bitmap_lock); 67988dcd2daSNicholas Bellinger 68088dcd2daSNicholas Bellinger if (conn->bitmap_id < 0) { 68188dcd2daSNicholas Bellinger pr_err("bitmap_find_free_region() failed for" 68288dcd2daSNicholas Bellinger " iscsit_start_kthreads()\n"); 68388dcd2daSNicholas Bellinger return -ENOMEM; 68488dcd2daSNicholas Bellinger } 68588dcd2daSNicholas Bellinger 68688dcd2daSNicholas Bellinger conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn, 68788dcd2daSNicholas Bellinger "%s", ISCSI_TX_THREAD_NAME); 68888dcd2daSNicholas Bellinger if (IS_ERR(conn->tx_thread)) { 68988dcd2daSNicholas Bellinger pr_err("Unable to start iscsi_target_tx_thread\n"); 69088dcd2daSNicholas Bellinger ret = PTR_ERR(conn->tx_thread); 69188dcd2daSNicholas Bellinger goto out_bitmap; 69288dcd2daSNicholas Bellinger } 69388dcd2daSNicholas Bellinger conn->tx_thread_active = true; 69488dcd2daSNicholas Bellinger 69588dcd2daSNicholas Bellinger conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn, 69688dcd2daSNicholas Bellinger "%s", ISCSI_RX_THREAD_NAME); 69788dcd2daSNicholas Bellinger if (IS_ERR(conn->rx_thread)) { 69888dcd2daSNicholas Bellinger pr_err("Unable to start iscsi_target_rx_thread\n"); 69988dcd2daSNicholas Bellinger ret = PTR_ERR(conn->rx_thread); 70088dcd2daSNicholas Bellinger goto out_tx; 70188dcd2daSNicholas Bellinger } 70288dcd2daSNicholas Bellinger conn->rx_thread_active = true; 70388dcd2daSNicholas Bellinger 70488dcd2daSNicholas Bellinger return 0; 70588dcd2daSNicholas Bellinger out_tx: 706e5419865SNicholas Bellinger send_sig(SIGINT, conn->tx_thread, 1); 70788dcd2daSNicholas Bellinger kthread_stop(conn->tx_thread); 70888dcd2daSNicholas Bellinger conn->tx_thread_active = false; 70988dcd2daSNicholas Bellinger out_bitmap: 71088dcd2daSNicholas Bellinger spin_lock(&iscsit_global->ts_bitmap_lock); 71188dcd2daSNicholas Bellinger bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, 71288dcd2daSNicholas Bellinger get_order(1)); 71388dcd2daSNicholas Bellinger spin_unlock(&iscsit_global->ts_bitmap_lock); 71488dcd2daSNicholas Bellinger return ret; 71588dcd2daSNicholas Bellinger } 71688dcd2daSNicholas Bellinger 717e5419865SNicholas Bellinger void iscsi_post_login_handler( 718e48354ceSNicholas Bellinger struct iscsi_np *np, 719e48354ceSNicholas Bellinger struct iscsi_conn *conn, 720e48354ceSNicholas Bellinger u8 zero_tsih) 721e48354ceSNicholas Bellinger { 722e48354ceSNicholas Bellinger int stop_timer = 0; 723e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 724e48354ceSNicholas Bellinger struct se_session *se_sess = sess->se_sess; 72560bfcf8eSAndy Grover struct iscsi_portal_group *tpg = sess->tpg; 726e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 727e48354ceSNicholas Bellinger 728e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 729e48354ceSNicholas Bellinger 730e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, 731e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_ACCEPT); 732e48354ceSNicholas Bellinger 733e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); 734e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_LOGGED_IN; 735e48354ceSNicholas Bellinger 736e48354ceSNicholas Bellinger iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); 737e48354ceSNicholas Bellinger /* 738e48354ceSNicholas Bellinger * SCSI Initiator -> SCSI Target Port Mapping 739e48354ceSNicholas Bellinger */ 740e48354ceSNicholas Bellinger if (!zero_tsih) { 741e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, 742e48354ceSNicholas Bellinger conn->param_list, 0); 743e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 744e48354ceSNicholas Bellinger conn->param_list = NULL; 745e48354ceSNicholas Bellinger 746e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 747e48354ceSNicholas Bellinger atomic_set(&sess->session_continuation, 0); 748e48354ceSNicholas Bellinger if (sess->session_state == TARG_SESS_STATE_FAILED) { 749e48354ceSNicholas Bellinger pr_debug("Moving to" 750e48354ceSNicholas Bellinger " TARG_SESS_STATE_LOGGED_IN.\n"); 751e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 752e48354ceSNicholas Bellinger stop_timer = 1; 753e48354ceSNicholas Bellinger } 754e48354ceSNicholas Bellinger 755dc58f760SAndy Grover pr_debug("iSCSI Login successful on CID: %hu from %pISpc to" 756dc58f760SAndy Grover " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr, 75769d75574SAndy Grover &conn->local_sockaddr, tpg->tpgt); 758e48354ceSNicholas Bellinger 759e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 760e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 761e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu" 762e48354ceSNicholas Bellinger " from node: %s\n", atomic_read(&sess->nconn), 763e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 764e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 765e48354ceSNicholas Bellinger 76688dcd2daSNicholas Bellinger iscsi_post_login_start_timers(conn); 767e48354ceSNicholas Bellinger /* 768e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 769e48354ceSNicholas Bellinger * are scheduled on the same CPU. 770e48354ceSNicholas Bellinger */ 771e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 772e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 773e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 774e5419865SNicholas Bellinger /* 775e5419865SNicholas Bellinger * Wakeup the sleeping iscsi_target_rx_thread() now that 776e5419865SNicholas Bellinger * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. 777e5419865SNicholas Bellinger */ 778e5419865SNicholas Bellinger complete(&conn->rx_login_comp); 779e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 780e5419865SNicholas Bellinger 781e48354ceSNicholas Bellinger if (stop_timer) { 782e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 783e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 784e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 785e48354ceSNicholas Bellinger } 786e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 787e5419865SNicholas Bellinger return; 788e48354ceSNicholas Bellinger } 789e48354ceSNicholas Bellinger 790e48354ceSNicholas Bellinger iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); 791e48354ceSNicholas Bellinger iscsi_release_param_list(conn->param_list); 792e48354ceSNicholas Bellinger conn->param_list = NULL; 793e48354ceSNicholas Bellinger 794e48354ceSNicholas Bellinger iscsit_determine_maxcmdsn(sess); 795e48354ceSNicholas Bellinger 796e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 797e48354ceSNicholas Bellinger __transport_register_session(&sess->tpg->tpg_se_tpg, 7988359cf43SJörn Engel se_sess->se_node_acl, se_sess, sess); 799e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); 800e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_LOGGED_IN; 801e48354ceSNicholas Bellinger 802dc58f760SAndy Grover pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n", 803dc58f760SAndy Grover conn->cid, &conn->login_sockaddr, &conn->local_sockaddr, 8042f9bc894SNicholas Bellinger tpg->tpgt); 805e48354ceSNicholas Bellinger 806e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 807e48354ceSNicholas Bellinger list_add_tail(&conn->conn_list, &sess->sess_conn_list); 808e48354ceSNicholas Bellinger atomic_inc(&sess->nconn); 809e48354ceSNicholas Bellinger pr_debug("Incremented iSCSI Connection count to %hu from node:" 810e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 811e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 812e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 813e48354ceSNicholas Bellinger 814e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 815e48354ceSNicholas Bellinger if (!sess->sid) 816e48354ceSNicholas Bellinger sess->sid = tpg->sid++; 817e48354ceSNicholas Bellinger pr_debug("Established iSCSI session from node: %s\n", 818e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 819e48354ceSNicholas Bellinger 820e48354ceSNicholas Bellinger tpg->nsessions++; 821e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 822e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions++; 823e48354ceSNicholas Bellinger 824e48354ceSNicholas Bellinger pr_debug("Incremented number of active iSCSI sessions to %u on" 825e48354ceSNicholas Bellinger " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); 826e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 827e48354ceSNicholas Bellinger 828e48354ceSNicholas Bellinger iscsi_post_login_start_timers(conn); 829e48354ceSNicholas Bellinger /* 830e48354ceSNicholas Bellinger * Determine CPU mask to ensure connection's RX and TX kthreads 831e48354ceSNicholas Bellinger * are scheduled on the same CPU. 832e48354ceSNicholas Bellinger */ 833e48354ceSNicholas Bellinger iscsit_thread_get_cpumask(conn); 834e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 1; 835e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 1; 836e5419865SNicholas Bellinger /* 837e5419865SNicholas Bellinger * Wakeup the sleeping iscsi_target_rx_thread() now that 838e5419865SNicholas Bellinger * iscsi_conn is in TARG_CONN_STATE_LOGGED_IN state. 839e5419865SNicholas Bellinger */ 840e5419865SNicholas Bellinger complete(&conn->rx_login_comp); 841e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 842e48354ceSNicholas Bellinger } 843e48354ceSNicholas Bellinger 844f7c9564aSKees Cook void iscsi_handle_login_thread_timeout(struct timer_list *t) 845e48354ceSNicholas Bellinger { 846f7c9564aSKees Cook struct iscsi_np *np = from_timer(np, t, np_login_timer); 847e48354ceSNicholas Bellinger 848e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 84969d75574SAndy Grover pr_err("iSCSI Login timeout on Network Portal %pISpc\n", 85069d75574SAndy Grover &np->np_sockaddr); 851e48354ceSNicholas Bellinger 852e48354ceSNicholas Bellinger if (np->np_login_timer_flags & ISCSI_TF_STOP) { 853e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 854e48354ceSNicholas Bellinger return; 855e48354ceSNicholas Bellinger } 856e48354ceSNicholas Bellinger 857e48354ceSNicholas Bellinger if (np->np_thread) 858e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 859e48354ceSNicholas Bellinger 860e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 861e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 862e48354ceSNicholas Bellinger } 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger static void iscsi_start_login_thread_timer(struct iscsi_np *np) 865e48354ceSNicholas Bellinger { 866e48354ceSNicholas Bellinger /* 867e48354ceSNicholas Bellinger * This used the TA_LOGIN_TIMEOUT constant because at this 868e48354ceSNicholas Bellinger * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout 869e48354ceSNicholas Bellinger */ 870e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 871e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_STOP; 872e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_RUNNING; 8738a47aa9dSBart Van Assche mod_timer(&np->np_login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ); 874e48354ceSNicholas Bellinger 875e48354ceSNicholas Bellinger pr_debug("Added timeout timer to iSCSI login request for" 876e48354ceSNicholas Bellinger " %u seconds.\n", TA_LOGIN_TIMEOUT); 877e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 878e48354ceSNicholas Bellinger } 879e48354ceSNicholas Bellinger 880e48354ceSNicholas Bellinger static void iscsi_stop_login_thread_timer(struct iscsi_np *np) 881e48354ceSNicholas Bellinger { 882e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 883e48354ceSNicholas Bellinger if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { 884e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 885e48354ceSNicholas Bellinger return; 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger np->np_login_timer_flags |= ISCSI_TF_STOP; 888e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 889e48354ceSNicholas Bellinger 890e48354ceSNicholas Bellinger del_timer_sync(&np->np_login_timer); 891e48354ceSNicholas Bellinger 892e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 893e48354ceSNicholas Bellinger np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; 894e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 895e48354ceSNicholas Bellinger } 896e48354ceSNicholas Bellinger 897baa4d64bSNicholas Bellinger int iscsit_setup_np( 898e48354ceSNicholas Bellinger struct iscsi_np *np, 89913a3cf08SAndy Grover struct sockaddr_storage *sockaddr) 900e48354ceSNicholas Bellinger { 901baa4d64bSNicholas Bellinger struct socket *sock = NULL; 902837f6452SNicholas Bellinger int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len; 903e48354ceSNicholas Bellinger 904e48354ceSNicholas Bellinger switch (np->np_network_transport) { 905e48354ceSNicholas Bellinger case ISCSI_TCP: 906e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 907e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 908e48354ceSNicholas Bellinger break; 909e48354ceSNicholas Bellinger case ISCSI_SCTP_TCP: 910e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 911e48354ceSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 912e48354ceSNicholas Bellinger break; 913e48354ceSNicholas Bellinger case ISCSI_SCTP_UDP: 914e48354ceSNicholas Bellinger np->np_ip_proto = IPPROTO_SCTP; 915e48354ceSNicholas Bellinger np->np_sock_type = SOCK_SEQPACKET; 916e48354ceSNicholas Bellinger break; 917e48354ceSNicholas Bellinger default: 918e48354ceSNicholas Bellinger pr_err("Unsupported network_transport: %d\n", 919e48354ceSNicholas Bellinger np->np_network_transport); 920e48354ceSNicholas Bellinger return -EINVAL; 921e48354ceSNicholas Bellinger } 922e48354ceSNicholas Bellinger 923baa4d64bSNicholas Bellinger np->np_ip_proto = IPPROTO_TCP; 924baa4d64bSNicholas Bellinger np->np_sock_type = SOCK_STREAM; 925baa4d64bSNicholas Bellinger 926e48354ceSNicholas Bellinger ret = sock_create(sockaddr->ss_family, np->np_sock_type, 927e48354ceSNicholas Bellinger np->np_ip_proto, &sock); 928e48354ceSNicholas Bellinger if (ret < 0) { 929e48354ceSNicholas Bellinger pr_err("sock_create() failed.\n"); 930e48354ceSNicholas Bellinger return ret; 931e48354ceSNicholas Bellinger } 932e48354ceSNicholas Bellinger np->np_socket = sock; 933e48354ceSNicholas Bellinger /* 934e48354ceSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 935e48354ceSNicholas Bellinger * in iscsi_target_configfs.c code.. 936e48354ceSNicholas Bellinger */ 9378359cf43SJörn Engel memcpy(&np->np_sockaddr, sockaddr, 93813a3cf08SAndy Grover sizeof(struct sockaddr_storage)); 939e48354ceSNicholas Bellinger 940e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) 941e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in6); 942e48354ceSNicholas Bellinger else 943e48354ceSNicholas Bellinger len = sizeof(struct sockaddr_in); 944e48354ceSNicholas Bellinger /* 945e48354ceSNicholas Bellinger * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. 946e48354ceSNicholas Bellinger */ 9478359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 948e48354ceSNicholas Bellinger opt = 1; 949e48354ceSNicholas Bellinger if (np->np_network_transport == ISCSI_TCP) { 950e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, 951e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 952e48354ceSNicholas Bellinger if (ret < 0) { 953e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for TCP_NODELAY" 954e48354ceSNicholas Bellinger " failed: %d\n", ret); 955e48354ceSNicholas Bellinger goto fail; 956e48354ceSNicholas Bellinger } 957e48354ceSNicholas Bellinger } 958e48354ceSNicholas Bellinger 9598359cf43SJörn Engel /* FIXME: Someone please explain why this is endian-safe */ 960e48354ceSNicholas Bellinger ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, 961e48354ceSNicholas Bellinger (char *)&opt, sizeof(opt)); 962e48354ceSNicholas Bellinger if (ret < 0) { 963e48354ceSNicholas Bellinger pr_err("kernel_setsockopt() for SO_REUSEADDR" 964e48354ceSNicholas Bellinger " failed\n"); 965e48354ceSNicholas Bellinger goto fail; 966e48354ceSNicholas Bellinger } 967e48354ceSNicholas Bellinger 9689f9ef6d3SDax Kelson ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, 9699f9ef6d3SDax Kelson (char *)&opt, sizeof(opt)); 9709f9ef6d3SDax Kelson if (ret < 0) { 9719f9ef6d3SDax Kelson pr_err("kernel_setsockopt() for IP_FREEBIND" 9729f9ef6d3SDax Kelson " failed\n"); 9739f9ef6d3SDax Kelson goto fail; 9749f9ef6d3SDax Kelson } 9759f9ef6d3SDax Kelson 976e48354ceSNicholas Bellinger ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); 977e48354ceSNicholas Bellinger if (ret < 0) { 978e48354ceSNicholas Bellinger pr_err("kernel_bind() failed: %d\n", ret); 979e48354ceSNicholas Bellinger goto fail; 980e48354ceSNicholas Bellinger } 981e48354ceSNicholas Bellinger 982e48354ceSNicholas Bellinger ret = kernel_listen(sock, backlog); 983e48354ceSNicholas Bellinger if (ret != 0) { 984e48354ceSNicholas Bellinger pr_err("kernel_listen() failed: %d\n", ret); 985e48354ceSNicholas Bellinger goto fail; 986e48354ceSNicholas Bellinger } 987e48354ceSNicholas Bellinger 988e48354ceSNicholas Bellinger return 0; 989e48354ceSNicholas Bellinger fail: 990e48354ceSNicholas Bellinger np->np_socket = NULL; 991e48354ceSNicholas Bellinger sock_release(sock); 992e48354ceSNicholas Bellinger return ret; 993e48354ceSNicholas Bellinger } 994e48354ceSNicholas Bellinger 995baa4d64bSNicholas Bellinger int iscsi_target_setup_login_socket( 996baa4d64bSNicholas Bellinger struct iscsi_np *np, 99713a3cf08SAndy Grover struct sockaddr_storage *sockaddr) 998baa4d64bSNicholas Bellinger { 999baa4d64bSNicholas Bellinger struct iscsit_transport *t; 1000baa4d64bSNicholas Bellinger int rc; 1001baa4d64bSNicholas Bellinger 1002baa4d64bSNicholas Bellinger t = iscsit_get_transport(np->np_network_transport); 1003baa4d64bSNicholas Bellinger if (!t) 1004baa4d64bSNicholas Bellinger return -EINVAL; 1005baa4d64bSNicholas Bellinger 1006baa4d64bSNicholas Bellinger rc = t->iscsit_setup_np(np, sockaddr); 1007baa4d64bSNicholas Bellinger if (rc < 0) { 1008baa4d64bSNicholas Bellinger iscsit_put_transport(t); 1009baa4d64bSNicholas Bellinger return rc; 1010baa4d64bSNicholas Bellinger } 1011baa4d64bSNicholas Bellinger 1012baa4d64bSNicholas Bellinger np->np_transport = t; 101314f4b54fSSagi Grimberg np->enabled = true; 1014baa4d64bSNicholas Bellinger return 0; 1015baa4d64bSNicholas Bellinger } 1016baa4d64bSNicholas Bellinger 1017baa4d64bSNicholas Bellinger int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 1018baa4d64bSNicholas Bellinger { 1019baa4d64bSNicholas Bellinger struct socket *new_sock, *sock = np->np_socket; 1020baa4d64bSNicholas Bellinger struct sockaddr_in sock_in; 1021baa4d64bSNicholas Bellinger struct sockaddr_in6 sock_in6; 10229b2c45d4SDenys Vlasenko int rc; 1023baa4d64bSNicholas Bellinger 1024baa4d64bSNicholas Bellinger rc = kernel_accept(sock, &new_sock, 0); 1025baa4d64bSNicholas Bellinger if (rc < 0) 1026baa4d64bSNicholas Bellinger return rc; 1027baa4d64bSNicholas Bellinger 1028baa4d64bSNicholas Bellinger conn->sock = new_sock; 1029baa4d64bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 1030baa4d64bSNicholas Bellinger 1031baa4d64bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 1032baa4d64bSNicholas Bellinger memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); 1033baa4d64bSNicholas Bellinger 1034baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10359b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in6, 1); 10369b2c45d4SDenys Vlasenko if (rc >= 0) { 1037dc58f760SAndy Grover if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { 1038dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6)); 1039dc58f760SAndy Grover } else { 1040dc58f760SAndy Grover /* Pretend to be an ipv4 socket */ 1041dc58f760SAndy Grover sock_in.sin_family = AF_INET; 1042dc58f760SAndy Grover sock_in.sin_port = sock_in6.sin6_port; 1043dc58f760SAndy Grover memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); 1044dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); 1045dc58f760SAndy Grover } 1046baa4d64bSNicholas Bellinger } 1047baa4d64bSNicholas Bellinger 1048baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10499b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in6, 0); 10509b2c45d4SDenys Vlasenko if (rc >= 0) { 105169d75574SAndy Grover if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) { 105269d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6)); 105369d75574SAndy Grover } else { 105469d75574SAndy Grover /* Pretend to be an ipv4 socket */ 105569d75574SAndy Grover sock_in.sin_family = AF_INET; 105669d75574SAndy Grover sock_in.sin_port = sock_in6.sin6_port; 105769d75574SAndy Grover memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4); 105869d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); 105969d75574SAndy Grover } 1060baa4d64bSNicholas Bellinger } 1061baa4d64bSNicholas Bellinger } else { 1062baa4d64bSNicholas Bellinger memset(&sock_in, 0, sizeof(struct sockaddr_in)); 1063baa4d64bSNicholas Bellinger 1064baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10659b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in, 1); 10669b2c45d4SDenys Vlasenko if (rc >= 0) 1067dc58f760SAndy Grover memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in)); 1068baa4d64bSNicholas Bellinger 1069baa4d64bSNicholas Bellinger rc = conn->sock->ops->getname(conn->sock, 10709b2c45d4SDenys Vlasenko (struct sockaddr *)&sock_in, 0); 10719b2c45d4SDenys Vlasenko if (rc >= 0) 107269d75574SAndy Grover memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in)); 1073baa4d64bSNicholas Bellinger } 1074baa4d64bSNicholas Bellinger 1075baa4d64bSNicholas Bellinger return 0; 1076baa4d64bSNicholas Bellinger } 1077baa4d64bSNicholas Bellinger 1078baa4d64bSNicholas Bellinger int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 1079baa4d64bSNicholas Bellinger { 1080baa4d64bSNicholas Bellinger struct iscsi_login_req *login_req; 1081baa4d64bSNicholas Bellinger u32 padding = 0, payload_length; 1082baa4d64bSNicholas Bellinger 1083baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) 1084baa4d64bSNicholas Bellinger return -1; 1085baa4d64bSNicholas Bellinger 1086baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1087baa4d64bSNicholas Bellinger payload_length = ntoh24(login_req->dlength); 1088baa4d64bSNicholas Bellinger padding = ((-payload_length) & 3); 1089baa4d64bSNicholas Bellinger 1090baa4d64bSNicholas Bellinger pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," 1091baa4d64bSNicholas Bellinger " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", 1092baa4d64bSNicholas Bellinger login_req->flags, login_req->itt, login_req->cmdsn, 1093baa4d64bSNicholas Bellinger login_req->exp_statsn, login_req->cid, payload_length); 1094baa4d64bSNicholas Bellinger /* 1095baa4d64bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1096baa4d64bSNicholas Bellinger * login request PDU. 1097baa4d64bSNicholas Bellinger */ 1098baa4d64bSNicholas Bellinger if (login->first_request) { 1099baa4d64bSNicholas Bellinger login_req = (struct iscsi_login_req *)login->req; 1100baa4d64bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 11013e1c81a9SNicholas Bellinger login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); 1102baa4d64bSNicholas Bellinger login->version_min = login_req->min_version; 1103baa4d64bSNicholas Bellinger login->version_max = login_req->max_version; 1104baa4d64bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1105baa4d64bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1106baa4d64bSNicholas Bellinger login->init_task_tag = login_req->itt; 1107baa4d64bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1108baa4d64bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1109baa4d64bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1110baa4d64bSNicholas Bellinger } 1111baa4d64bSNicholas Bellinger 1112baa4d64bSNicholas Bellinger if (iscsi_target_check_login_request(conn, login) < 0) 1113baa4d64bSNicholas Bellinger return -1; 1114baa4d64bSNicholas Bellinger 1115baa4d64bSNicholas Bellinger memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); 1116baa4d64bSNicholas Bellinger if (iscsi_login_rx_data(conn, login->req_buf, 1117baa4d64bSNicholas Bellinger payload_length + padding) < 0) 1118baa4d64bSNicholas Bellinger return -1; 1119baa4d64bSNicholas Bellinger 1120baa4d64bSNicholas Bellinger return 0; 1121baa4d64bSNicholas Bellinger } 1122baa4d64bSNicholas Bellinger 1123baa4d64bSNicholas Bellinger int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1124baa4d64bSNicholas Bellinger u32 length) 1125baa4d64bSNicholas Bellinger { 1126baa4d64bSNicholas Bellinger if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) 1127baa4d64bSNicholas Bellinger return -1; 1128baa4d64bSNicholas Bellinger 1129baa4d64bSNicholas Bellinger return 0; 1130baa4d64bSNicholas Bellinger } 1131baa4d64bSNicholas Bellinger 1132baa4d64bSNicholas Bellinger static int 1133baa4d64bSNicholas Bellinger iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) 1134baa4d64bSNicholas Bellinger { 1135baa4d64bSNicholas Bellinger int rc; 1136baa4d64bSNicholas Bellinger 1137baa4d64bSNicholas Bellinger if (!t->owner) { 1138baa4d64bSNicholas Bellinger conn->conn_transport = t; 1139baa4d64bSNicholas Bellinger return 0; 1140baa4d64bSNicholas Bellinger } 1141baa4d64bSNicholas Bellinger 1142baa4d64bSNicholas Bellinger rc = try_module_get(t->owner); 1143baa4d64bSNicholas Bellinger if (!rc) { 1144baa4d64bSNicholas Bellinger pr_err("try_module_get() failed for %s\n", t->name); 1145baa4d64bSNicholas Bellinger return -EINVAL; 1146baa4d64bSNicholas Bellinger } 1147baa4d64bSNicholas Bellinger 1148baa4d64bSNicholas Bellinger conn->conn_transport = t; 1149baa4d64bSNicholas Bellinger return 0; 1150baa4d64bSNicholas Bellinger } 1151baa4d64bSNicholas Bellinger 1152a91eb7d9SNicholas Bellinger void iscsi_target_login_sess_out(struct iscsi_conn *conn, 1153a91eb7d9SNicholas Bellinger struct iscsi_np *np, bool zero_tsih, bool new_sess) 1154a91eb7d9SNicholas Bellinger { 11550bcc297eSChristophe Vu-Brugier if (!new_sess) 1156a91eb7d9SNicholas Bellinger goto old_sess_out; 1157a91eb7d9SNicholas Bellinger 1158a91eb7d9SNicholas Bellinger pr_err("iSCSI Login negotiation failed.\n"); 1159a91eb7d9SNicholas Bellinger iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, 1160a91eb7d9SNicholas Bellinger ISCSI_LOGIN_STATUS_INIT_ERR); 1161a91eb7d9SNicholas Bellinger if (!zero_tsih || !conn->sess) 1162a91eb7d9SNicholas Bellinger goto old_sess_out; 116326abc916SMike Christie 1164a91eb7d9SNicholas Bellinger transport_free_session(conn->sess->se_sess); 116531ff0ceeSMatthew Wilcox ida_free(&sess_ida, conn->sess->session_index); 1166a91eb7d9SNicholas Bellinger kfree(conn->sess->sess_ops); 1167a91eb7d9SNicholas Bellinger kfree(conn->sess); 1168a0b3b9b2SSagi Grimberg conn->sess = NULL; 1169a91eb7d9SNicholas Bellinger 1170a91eb7d9SNicholas Bellinger old_sess_out: 1171a91eb7d9SNicholas Bellinger iscsi_stop_login_thread_timer(np); 1172a91eb7d9SNicholas Bellinger /* 1173a91eb7d9SNicholas Bellinger * If login negotiation fails check if the Time2Retain timer 1174a91eb7d9SNicholas Bellinger * needs to be restarted. 1175a91eb7d9SNicholas Bellinger */ 1176a91eb7d9SNicholas Bellinger if (!zero_tsih && conn->sess) { 1177a91eb7d9SNicholas Bellinger spin_lock_bh(&conn->sess->conn_lock); 1178a91eb7d9SNicholas Bellinger if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { 1179a91eb7d9SNicholas Bellinger struct se_portal_group *se_tpg = 118060bfcf8eSAndy Grover &conn->tpg->tpg_se_tpg; 1181a91eb7d9SNicholas Bellinger 1182a91eb7d9SNicholas Bellinger atomic_set(&conn->sess->session_continuation, 0); 1183a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1184a91eb7d9SNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 1185a91eb7d9SNicholas Bellinger iscsit_start_time2retain_handler(conn->sess); 1186a91eb7d9SNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 1187a91eb7d9SNicholas Bellinger } else 1188a91eb7d9SNicholas Bellinger spin_unlock_bh(&conn->sess->conn_lock); 1189a91eb7d9SNicholas Bellinger iscsit_dec_session_usage_count(conn->sess); 1190a91eb7d9SNicholas Bellinger } 1191a91eb7d9SNicholas Bellinger 119269110e3cSHerbert Xu ahash_request_free(conn->conn_tx_hash); 119369110e3cSHerbert Xu if (conn->conn_rx_hash) { 119469110e3cSHerbert Xu struct crypto_ahash *tfm; 119569110e3cSHerbert Xu 119669110e3cSHerbert Xu tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); 119769110e3cSHerbert Xu ahash_request_free(conn->conn_rx_hash); 119869110e3cSHerbert Xu crypto_free_ahash(tfm); 119969110e3cSHerbert Xu } 1200a91eb7d9SNicholas Bellinger 1201a91eb7d9SNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 1202a91eb7d9SNicholas Bellinger 1203a91eb7d9SNicholas Bellinger kfree(conn->conn_ops); 1204a91eb7d9SNicholas Bellinger 1205a91eb7d9SNicholas Bellinger if (conn->param_list) { 1206a91eb7d9SNicholas Bellinger iscsi_release_param_list(conn->param_list); 1207a91eb7d9SNicholas Bellinger conn->param_list = NULL; 1208a91eb7d9SNicholas Bellinger } 1209a91eb7d9SNicholas Bellinger iscsi_target_nego_release(conn); 1210a91eb7d9SNicholas Bellinger 1211a91eb7d9SNicholas Bellinger if (conn->sock) { 1212a91eb7d9SNicholas Bellinger sock_release(conn->sock); 1213a91eb7d9SNicholas Bellinger conn->sock = NULL; 1214a91eb7d9SNicholas Bellinger } 1215a91eb7d9SNicholas Bellinger 1216954f2372SSagi Grimberg if (conn->conn_transport->iscsit_wait_conn) 1217954f2372SSagi Grimberg conn->conn_transport->iscsit_wait_conn(conn); 1218954f2372SSagi Grimberg 1219a91eb7d9SNicholas Bellinger if (conn->conn_transport->iscsit_free_conn) 1220a91eb7d9SNicholas Bellinger conn->conn_transport->iscsit_free_conn(conn); 1221a91eb7d9SNicholas Bellinger 1222a91eb7d9SNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1223a91eb7d9SNicholas Bellinger kfree(conn); 1224a91eb7d9SNicholas Bellinger } 1225a91eb7d9SNicholas Bellinger 1226e48354ceSNicholas Bellinger static int __iscsi_target_login_thread(struct iscsi_np *np) 1227e48354ceSNicholas Bellinger { 1228baa4d64bSNicholas Bellinger u8 *buffer, zero_tsih = 0; 122981a9c5e7SMikulas Patocka int ret = 0, rc; 1230e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 1231e48354ceSNicholas Bellinger struct iscsi_login *login; 1232e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = NULL; 1233e48354ceSNicholas Bellinger struct iscsi_login_req *pdu; 1234a91eb7d9SNicholas Bellinger struct iscsi_tpg_np *tpg_np; 1235a91eb7d9SNicholas Bellinger bool new_sess = false; 1236e48354ceSNicholas Bellinger 1237e48354ceSNicholas Bellinger flush_signals(current); 1238e48354ceSNicholas Bellinger 1239e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1240978d13d6SNicholas Bellinger if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { 1241e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1242978d13d6SNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1243e48354ceSNicholas Bellinger complete(&np->np_restart_comp); 1244978d13d6SNicholas Bellinger return 1; 124581a9c5e7SMikulas Patocka } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) { 124681a9c5e7SMikulas Patocka spin_unlock_bh(&np->np_thread_lock); 124781a9c5e7SMikulas Patocka goto exit; 1248e48354ceSNicholas Bellinger } else { 1249e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1250e48354ceSNicholas Bellinger } 1251e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1252e48354ceSNicholas Bellinger 1253e48354ceSNicholas Bellinger conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); 1254e48354ceSNicholas Bellinger if (!conn) { 1255e48354ceSNicholas Bellinger pr_err("Could not allocate memory for" 1256e48354ceSNicholas Bellinger " new connection\n"); 1257e48354ceSNicholas Bellinger /* Get another socket */ 1258e48354ceSNicholas Bellinger return 1; 1259e48354ceSNicholas Bellinger } 1260e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 1261e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 1262e48354ceSNicholas Bellinger 1263f7c9564aSKees Cook timer_setup(&conn->nopin_response_timer, 1264f7c9564aSKees Cook iscsit_handle_nopin_response_timeout, 0); 1265f7c9564aSKees Cook timer_setup(&conn->nopin_timer, iscsit_handle_nopin_timeout, 0); 12668a47aa9dSBart Van Assche 1267baa4d64bSNicholas Bellinger if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { 1268baa4d64bSNicholas Bellinger kfree(conn); 1269baa4d64bSNicholas Bellinger return 1; 1270baa4d64bSNicholas Bellinger } 1271e48354ceSNicholas Bellinger 1272baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_accept_np(np, conn); 1273baa4d64bSNicholas Bellinger if (rc == -ENOSYS) { 1274baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 1275baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1276baa4d64bSNicholas Bellinger kfree(conn); 1277baa4d64bSNicholas Bellinger conn = NULL; 1278baa4d64bSNicholas Bellinger goto exit; 1279baa4d64bSNicholas Bellinger } else if (rc < 0) { 1280baa4d64bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1281978d13d6SNicholas Bellinger if (atomic_dec_if_positive(&np->np_reset_count) >= 0) { 1282978d13d6SNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; 1283baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1284baa4d64bSNicholas Bellinger complete(&np->np_restart_comp); 1285baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1286baa4d64bSNicholas Bellinger kfree(conn); 1287baa4d64bSNicholas Bellinger conn = NULL; 1288baa4d64bSNicholas Bellinger /* Get another socket */ 1289baa4d64bSNicholas Bellinger return 1; 1290baa4d64bSNicholas Bellinger } 1291baa4d64bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1292baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 1293baa4d64bSNicholas Bellinger kfree(conn); 1294baa4d64bSNicholas Bellinger conn = NULL; 1295baa4d64bSNicholas Bellinger goto out; 1296e48354ceSNicholas Bellinger } 1297e48354ceSNicholas Bellinger /* 1298e48354ceSNicholas Bellinger * Perform the remaining iSCSI connection initialization items.. 1299e48354ceSNicholas Bellinger */ 1300baa4d64bSNicholas Bellinger login = iscsi_login_init_conn(conn); 1301baa4d64bSNicholas Bellinger if (!login) { 1302e48354ceSNicholas Bellinger goto new_sess_out; 1303e48354ceSNicholas Bellinger } 1304e48354ceSNicholas Bellinger 1305baa4d64bSNicholas Bellinger iscsi_start_login_thread_timer(np); 1306e48354ceSNicholas Bellinger 1307baa4d64bSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); 1308baa4d64bSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_XPT_UP; 1309baa4d64bSNicholas Bellinger /* 1310baa4d64bSNicholas Bellinger * This will process the first login request + payload.. 1311baa4d64bSNicholas Bellinger */ 1312baa4d64bSNicholas Bellinger rc = np->np_transport->iscsit_get_login_rx(conn, login); 1313baa4d64bSNicholas Bellinger if (rc == 1) 1314baa4d64bSNicholas Bellinger return 1; 1315baa4d64bSNicholas Bellinger else if (rc < 0) 1316baa4d64bSNicholas Bellinger goto new_sess_out; 1317baa4d64bSNicholas Bellinger 1318baa4d64bSNicholas Bellinger buffer = &login->req[0]; 1319e48354ceSNicholas Bellinger pdu = (struct iscsi_login_req *)buffer; 1320e48354ceSNicholas Bellinger /* 1321e48354ceSNicholas Bellinger * Used by iscsit_tx_login_rsp() for Login Resonses PDUs 1322e48354ceSNicholas Bellinger * when Status-Class != 0. 1323e48354ceSNicholas Bellinger */ 1324e48354ceSNicholas Bellinger conn->login_itt = pdu->itt; 1325e48354ceSNicholas Bellinger 1326e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1327e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 1328e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 132969d75574SAndy Grover pr_err("iSCSI Network Portal on %pISpc currently not" 133069d75574SAndy Grover " active.\n", &np->np_sockaddr); 1331e48354ceSNicholas Bellinger iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, 1332e48354ceSNicholas Bellinger ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); 1333e48354ceSNicholas Bellinger goto new_sess_out; 1334e48354ceSNicholas Bellinger } 1335e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1336e48354ceSNicholas Bellinger 1337e48354ceSNicholas Bellinger conn->network_transport = np->np_network_transport; 1338e48354ceSNicholas Bellinger 1339dc58f760SAndy Grover pr_debug("Received iSCSI login request from %pISpc on %s Network" 1340dc58f760SAndy Grover " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name, 134169d75574SAndy Grover &conn->local_sockaddr); 1342e48354ceSNicholas Bellinger 1343e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); 1344e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGIN; 1345e48354ceSNicholas Bellinger 1346e48354ceSNicholas Bellinger if (iscsi_login_check_initiator_version(conn, pdu->max_version, 1347e48354ceSNicholas Bellinger pdu->min_version) < 0) 1348e48354ceSNicholas Bellinger goto new_sess_out; 1349e48354ceSNicholas Bellinger 1350e48354ceSNicholas Bellinger zero_tsih = (pdu->tsih == 0x0000); 1351ee1b1b9cSAndy Grover if (zero_tsih) { 1352e48354ceSNicholas Bellinger /* 1353e48354ceSNicholas Bellinger * This is the leading connection of a new session. 1354e48354ceSNicholas Bellinger * We wait until after authentication to check for 1355e48354ceSNicholas Bellinger * session reinstatement. 1356e48354ceSNicholas Bellinger */ 1357e48354ceSNicholas Bellinger if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) 1358e48354ceSNicholas Bellinger goto new_sess_out; 1359e48354ceSNicholas Bellinger } else { 1360e48354ceSNicholas Bellinger /* 1361e48354ceSNicholas Bellinger * Add a new connection to an existing session. 1362e48354ceSNicholas Bellinger * We check for a non-existant session in 1363e48354ceSNicholas Bellinger * iscsi_login_non_zero_tsih_s2() below based 1364e48354ceSNicholas Bellinger * on ISID/TSIH, but wait until after authentication 1365e48354ceSNicholas Bellinger * to check for connection reinstatement, etc. 1366e48354ceSNicholas Bellinger */ 1367e48354ceSNicholas Bellinger if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) 1368e48354ceSNicholas Bellinger goto new_sess_out; 1369e48354ceSNicholas Bellinger } 1370e48354ceSNicholas Bellinger /* 1371baa4d64bSNicholas Bellinger * SessionType: Discovery 1372baa4d64bSNicholas Bellinger * 1373baa4d64bSNicholas Bellinger * Locates Default Portal 1374baa4d64bSNicholas Bellinger * 1375baa4d64bSNicholas Bellinger * SessionType: Normal 1376baa4d64bSNicholas Bellinger * 1377baa4d64bSNicholas Bellinger * Locates Target Portal from NP -> Target IQN 1378e48354ceSNicholas Bellinger */ 1379baa4d64bSNicholas Bellinger rc = iscsi_target_locate_portal(np, conn, login); 1380baa4d64bSNicholas Bellinger if (rc < 0) { 1381e48354ceSNicholas Bellinger tpg = conn->tpg; 1382e48354ceSNicholas Bellinger goto new_sess_out; 1383e48354ceSNicholas Bellinger } 1384a91eb7d9SNicholas Bellinger login->zero_tsih = zero_tsih; 1385e48354ceSNicholas Bellinger 13868abc718dSFeng Li if (conn->sess) 138723a548eeSSagi Grimberg conn->sess->se_sess->sup_prot_ops = 138823a548eeSSagi Grimberg conn->conn_transport->iscsit_get_sup_prot_ops(conn); 138923a548eeSSagi Grimberg 1390e48354ceSNicholas Bellinger tpg = conn->tpg; 1391e48354ceSNicholas Bellinger if (!tpg) { 1392e48354ceSNicholas Bellinger pr_err("Unable to locate struct iscsi_conn->tpg\n"); 1393e48354ceSNicholas Bellinger goto new_sess_out; 1394e48354ceSNicholas Bellinger } 1395e48354ceSNicholas Bellinger 1396e48354ceSNicholas Bellinger if (zero_tsih) { 1397baa4d64bSNicholas Bellinger if (iscsi_login_zero_tsih_s2(conn) < 0) 1398e48354ceSNicholas Bellinger goto new_sess_out; 1399e48354ceSNicholas Bellinger } else { 1400baa4d64bSNicholas Bellinger if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) 1401e48354ceSNicholas Bellinger goto old_sess_out; 1402e48354ceSNicholas Bellinger } 1403e48354ceSNicholas Bellinger 140442bc3e57SVarun Prakash if (conn->conn_transport->iscsit_validate_params) { 140542bc3e57SVarun Prakash ret = conn->conn_transport->iscsit_validate_params(conn); 140642bc3e57SVarun Prakash if (ret < 0) { 140742bc3e57SVarun Prakash if (zero_tsih) 140842bc3e57SVarun Prakash goto new_sess_out; 140942bc3e57SVarun Prakash else 141042bc3e57SVarun Prakash goto old_sess_out; 141142bc3e57SVarun Prakash } 141242bc3e57SVarun Prakash } 141342bc3e57SVarun Prakash 1414a91eb7d9SNicholas Bellinger ret = iscsi_target_start_negotiation(login, conn); 1415a91eb7d9SNicholas Bellinger if (ret < 0) 1416e48354ceSNicholas Bellinger goto new_sess_out; 1417e48354ceSNicholas Bellinger 1418e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1419e48354ceSNicholas Bellinger 1420a91eb7d9SNicholas Bellinger if (ret == 1) { 1421a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1422e48354ceSNicholas Bellinger 1423e5419865SNicholas Bellinger iscsi_post_login_handler(np, conn, zero_tsih); 1424a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1425a91eb7d9SNicholas Bellinger } 1426a91eb7d9SNicholas Bellinger 1427e48354ceSNicholas Bellinger tpg = NULL; 1428a91eb7d9SNicholas Bellinger tpg_np = NULL; 1429e48354ceSNicholas Bellinger /* Get another socket */ 1430e48354ceSNicholas Bellinger return 1; 1431e48354ceSNicholas Bellinger 1432e48354ceSNicholas Bellinger new_sess_out: 1433a91eb7d9SNicholas Bellinger new_sess = true; 1434e48354ceSNicholas Bellinger old_sess_out: 1435a91eb7d9SNicholas Bellinger tpg_np = conn->tpg_np; 1436a91eb7d9SNicholas Bellinger iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess); 1437a91eb7d9SNicholas Bellinger new_sess = false; 1438e48354ceSNicholas Bellinger 1439e48354ceSNicholas Bellinger if (tpg) { 1440a91eb7d9SNicholas Bellinger iscsit_deaccess_np(np, tpg, tpg_np); 1441e48354ceSNicholas Bellinger tpg = NULL; 1442a91eb7d9SNicholas Bellinger tpg_np = NULL; 1443e48354ceSNicholas Bellinger } 1444e48354ceSNicholas Bellinger 1445e48354ceSNicholas Bellinger out: 1446e48354ceSNicholas Bellinger return 1; 144781a9c5e7SMikulas Patocka 1448baa4d64bSNicholas Bellinger exit: 1449e48354ceSNicholas Bellinger iscsi_stop_login_thread_timer(np); 1450e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 1451e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_EXIT; 1452e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 1453baa4d64bSNicholas Bellinger 1454e48354ceSNicholas Bellinger return 0; 1455e48354ceSNicholas Bellinger } 1456e48354ceSNicholas Bellinger 1457e48354ceSNicholas Bellinger int iscsi_target_login_thread(void *arg) 1458e48354ceSNicholas Bellinger { 14598359cf43SJörn Engel struct iscsi_np *np = arg; 1460e48354ceSNicholas Bellinger int ret; 1461e48354ceSNicholas Bellinger 1462e48354ceSNicholas Bellinger allow_signal(SIGINT); 1463e48354ceSNicholas Bellinger 146481a9c5e7SMikulas Patocka while (1) { 1465e48354ceSNicholas Bellinger ret = __iscsi_target_login_thread(np); 1466e48354ceSNicholas Bellinger /* 1467e48354ceSNicholas Bellinger * We break and exit here unless another sock_accept() call 1468e48354ceSNicholas Bellinger * is expected. 1469e48354ceSNicholas Bellinger */ 1470e48354ceSNicholas Bellinger if (ret != 1) 1471e48354ceSNicholas Bellinger break; 1472e48354ceSNicholas Bellinger } 1473e48354ceSNicholas Bellinger 14745e0cf5e6SJiang Yi while (!kthread_should_stop()) { 14755e0cf5e6SJiang Yi msleep(100); 14765e0cf5e6SJiang Yi } 14775e0cf5e6SJiang Yi 1478e48354ceSNicholas Bellinger return 0; 1479e48354ceSNicholas Bellinger } 1480