| /******************************************************************************* |
| * This file contains the login functions used by the iSCSI Target driver. |
| * |
| * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. |
| * |
| * Licensed to the Linux Foundation under the General Public License (GPL) version 2. |
| * |
| * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| ******************************************************************************/ |
| |
| #include <linux/string.h> |
| #include <linux/kthread.h> |
| #include <linux/crypto.h> |
| #include <linux/idr.h> |
| #include <scsi/iscsi_proto.h> |
| #include <target/target_core_base.h> |
| #include <target/target_core_fabric.h> |
| |
| #include "iscsi_target_core.h" |
| #include "iscsi_target_tq.h" |
| #include "iscsi_target_device.h" |
| #include "iscsi_target_nego.h" |
| #include "iscsi_target_erl0.h" |
| #include "iscsi_target_erl2.h" |
| #include "iscsi_target_login.h" |
| #include "iscsi_target_stat.h" |
| #include "iscsi_target_tpg.h" |
| #include "iscsi_target_util.h" |
| #include "iscsi_target.h" |
| #include "iscsi_target_parameters.h" |
| |
| #include <target/iscsi/iscsi_transport.h> |
| |
| static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn) |
| { |
| struct iscsi_login *login; |
| |
| login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL); |
| if (!login) { |
| pr_err("Unable to allocate memory for struct iscsi_login.\n"); |
| return NULL; |
| } |
| login->conn = conn; |
| login->first_request = 1; |
| |
| login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); |
| if (!login->req_buf) { |
| pr_err("Unable to allocate memory for response buffer.\n"); |
| goto out_login; |
| } |
| |
| login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL); |
| if (!login->rsp_buf) { |
| pr_err("Unable to allocate memory for request buffer.\n"); |
| goto out_req_buf; |
| } |
| |
| conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL); |
| if (!conn->conn_ops) { |
| pr_err("Unable to allocate memory for" |
| " struct iscsi_conn_ops.\n"); |
| goto out_rsp_buf; |
| } |
| |
| init_waitqueue_head(&conn->queues_wq); |
| INIT_LIST_HEAD(&conn->conn_list); |
| INIT_LIST_HEAD(&conn->conn_cmd_list); |
| INIT_LIST_HEAD(&conn->immed_queue_list); |
| INIT_LIST_HEAD(&conn->response_queue_list); |
| init_completion(&conn->conn_post_wait_comp); |
| init_completion(&conn->conn_wait_comp); |
| init_completion(&conn->conn_wait_rcfr_comp); |
| init_completion(&conn->conn_waiting_on_uc_comp); |
| init_completion(&conn->conn_logout_comp); |
| init_completion(&conn->rx_half_close_comp); |
| init_completion(&conn->tx_half_close_comp); |
| spin_lock_init(&conn->cmd_lock); |
| spin_lock_init(&conn->conn_usage_lock); |
| spin_lock_init(&conn->immed_queue_lock); |
| spin_lock_init(&conn->nopin_timer_lock); |
| spin_lock_init(&conn->response_queue_lock); |
| spin_lock_init(&conn->state_lock); |
| |
| if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) { |
| pr_err("Unable to allocate conn->conn_cpumask\n"); |
| goto out_conn_ops; |
| } |
| conn->conn_login = login; |
| |
| return login; |
| |
| out_conn_ops: |
| kfree(conn->conn_ops); |
| out_rsp_buf: |
| kfree(login->rsp_buf); |
| out_req_buf: |
| kfree(login->req_buf); |
| out_login: |
| kfree(login); |
| return NULL; |
| } |
| |
| /* |
| * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup |
| * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel |
| */ |
| int iscsi_login_setup_crypto(struct iscsi_conn *conn) |
| { |
| /* |
| * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts |
| * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback |
| * to software 1x8 byte slicing from crc32c.ko |
| */ |
| conn->conn_rx_hash.flags = 0; |
| conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
| CRYPTO_ALG_ASYNC); |
| if (IS_ERR(conn->conn_rx_hash.tfm)) { |
| pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n"); |
| return -ENOMEM; |
| } |
| |
| conn->conn_tx_hash.flags = 0; |
| conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
| CRYPTO_ALG_ASYNC); |
| if (IS_ERR(conn->conn_tx_hash.tfm)) { |
| pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n"); |
| crypto_free_hash(conn->conn_rx_hash.tfm); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static int iscsi_login_check_initiator_version( |
| struct iscsi_conn *conn, |
| u8 version_max, |
| u8 version_min) |
| { |
| if ((version_max != 0x00) || (version_min != 0x00)) { |
| pr_err("Unsupported iSCSI IETF Pre-RFC Revision," |
| " version Min/Max 0x%02x/0x%02x, rejecting login.\n", |
| version_min, version_max); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| ISCSI_LOGIN_STATUS_NO_VERSION); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn) |
| { |
| int sessiontype; |
| struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL; |
| struct iscsi_portal_group *tpg = conn->tpg; |
| struct iscsi_session *sess = NULL, *sess_p = NULL; |
| struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
| struct se_session *se_sess, *se_sess_tmp; |
| |
| initiatorname_param = iscsi_find_param_from_key( |
| INITIATORNAME, conn->param_list); |
| sessiontype_param = iscsi_find_param_from_key( |
| SESSIONTYPE, conn->param_list); |
| if (!initiatorname_param || !sessiontype_param) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| ISCSI_LOGIN_STATUS_MISSING_FIELDS); |
| return -1; |
| } |
| |
| sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0; |
| |
| spin_lock_bh(&se_tpg->session_lock); |
| list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, |
| sess_list) { |
| |
| sess_p = se_sess->fabric_sess_ptr; |
| spin_lock(&sess_p->conn_lock); |
| if (atomic_read(&sess_p->session_fall_back_to_erl0) || |
| atomic_read(&sess_p->session_logout) || |
| (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { |
| spin_unlock(&sess_p->conn_lock); |
| continue; |
| } |
| if (!memcmp(sess_p->isid, conn->sess->isid, 6) && |
| (!strcmp(sess_p->sess_ops->InitiatorName, |
| initiatorname_param->value) && |
| (sess_p->sess_ops->SessionType == sessiontype))) { |
| atomic_set(&sess_p->session_reinstatement, 1); |
| spin_unlock(&sess_p->conn_lock); |
| iscsit_inc_session_usage_count(sess_p); |
| iscsit_stop_time2retain_timer(sess_p); |
| sess = sess_p; |
| break; |
| } |
| spin_unlock(&sess_p->conn_lock); |
| } |
| spin_unlock_bh(&se_tpg->session_lock); |
| /* |
| * If the Time2Retain handler has expired, the session is already gone. |
| */ |
| if (!sess) |
| return 0; |
| |
| pr_debug("%s iSCSI Session SID %u is still active for %s," |
| " preforming session reinstatement.\n", (sessiontype) ? |
| "Discovery" : "Normal", sess->sid, |
| sess->sess_ops->InitiatorName); |
| |
| spin_lock_bh(&sess->conn_lock); |
| if (sess->session_state == TARG_SESS_STATE_FAILED) { |
| spin_unlock_bh(&sess->conn_lock); |
| iscsit_dec_session_usage_count(sess); |
| target_put_session(sess->se_sess); |
| return 0; |
| } |
| spin_unlock_bh(&sess->conn_lock); |
| |
| iscsit_stop_session(sess, 1, 1); |
| iscsit_dec_session_usage_count(sess); |
| |
| target_put_session(sess->se_sess); |
| return 0; |
| } |
| |
| static void iscsi_login_set_conn_values( |
| struct iscsi_session *sess, |
| struct iscsi_conn *conn, |
| __be16 cid) |
| { |
| conn->sess = sess; |
| conn->cid = be16_to_cpu(cid); |
| /* |
| * Generate a random Status sequence number (statsn) for the new |
| * iSCSI connection. |
| */ |
| get_random_bytes(&conn->stat_sn, sizeof(u32)); |
| |
| mutex_lock(&auth_id_lock); |
| conn->auth_id = iscsit_global->auth_id++; |
| mutex_unlock(&auth_id_lock); |
| } |
| |
| /* |
| * This is the leading connection of a new session, |
| * or session reinstatement. |
| */ |
| static int iscsi_login_zero_tsih_s1( |
| struct iscsi_conn *conn, |
| unsigned char *buf) |
| { |
| struct iscsi_session *sess = NULL; |
| struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
| int ret; |
| |
| sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL); |
| if (!sess) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| pr_err("Could not allocate memory for session\n"); |
| return -ENOMEM; |
| } |
| |
| iscsi_login_set_conn_values(sess, conn, pdu->cid); |
| sess->init_task_tag = pdu->itt; |
| memcpy(&sess->isid, pdu->isid, 6); |
| sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn); |
| INIT_LIST_HEAD(&sess->sess_conn_list); |
| INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list); |
| INIT_LIST_HEAD(&sess->cr_active_list); |
| INIT_LIST_HEAD(&sess->cr_inactive_list); |
| init_completion(&sess->async_msg_comp); |
| init_completion(&sess->reinstatement_comp); |
| init_completion(&sess->session_wait_comp); |
| init_completion(&sess->session_waiting_on_uc_comp); |
| mutex_init(&sess->cmdsn_mutex); |
| spin_lock_init(&sess->conn_lock); |
| spin_lock_init(&sess->cr_a_lock); |
| spin_lock_init(&sess->cr_i_lock); |
| spin_lock_init(&sess->session_usage_lock); |
| spin_lock_init(&sess->ttt_lock); |
| |
| idr_preload(GFP_KERNEL); |
| spin_lock_bh(&sess_idr_lock); |
| ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT); |
| if (ret >= 0) |
| sess->session_index = ret; |
| spin_unlock_bh(&sess_idr_lock); |
| idr_preload_end(); |
| |
| if (ret < 0) { |
| pr_err("idr_alloc() for sess_idr failed\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| kfree(sess); |
| return -ENOMEM; |
| } |
| |
| sess->creation_time = get_jiffies_64(); |
| spin_lock_init(&sess->session_stats_lock); |
| /* |
| * The FFP CmdSN window values will be allocated from the TPG's |
| * Initiator Node's ACL once the login has been successfully completed. |
| */ |
| sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn); |
| |
| sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL); |
| if (!sess->sess_ops) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| pr_err("Unable to allocate memory for" |
| " struct iscsi_sess_ops.\n"); |
| kfree(sess); |
| return -ENOMEM; |
| } |
| |
| sess->se_sess = transport_init_session(); |
| if (IS_ERR(sess->se_sess)) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| kfree(sess); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static int iscsi_login_zero_tsih_s2( |
| struct iscsi_conn *conn) |
| { |
| struct iscsi_node_attrib *na; |
| struct iscsi_session *sess = conn->sess; |
| unsigned char buf[32]; |
| bool iser = false; |
| |
| sess->tpg = conn->tpg; |
| |
| /* |
| * Assign a new TPG Session Handle. Note this is protected with |
| * struct iscsi_portal_group->np_login_sem from iscsit_access_np(). |
| */ |
| sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; |
| if (!sess->tsih) |
| sess->tsih = ++ISCSI_TPG_S(sess)->ntsih; |
| |
| /* |
| * Create the default params from user defined values.. |
| */ |
| if (iscsi_copy_param_list(&conn->param_list, |
| ISCSI_TPG_C(conn)->param_list, 1) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| |
| if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| iser = true; |
| |
| iscsi_set_keys_to_negotiate(conn->param_list, iser); |
| |
| if (sess->sess_ops->SessionType) |
| return iscsi_set_keys_irrelevant_for_discovery( |
| conn->param_list); |
| |
| na = iscsit_tpg_get_node_attrib(sess); |
| |
| /* |
| * Need to send TargetPortalGroupTag back in first login response |
| * on any iSCSI connection where the Initiator provides TargetName. |
| * See 5.3.1. Login Phase Start |
| * |
| * In our case, we have already located the struct iscsi_tiqn at this point. |
| */ |
| memset(buf, 0, 32); |
| sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); |
| if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| |
| /* |
| * Workaround for Initiators that have broken connection recovery logic. |
| * |
| * "We would really like to get rid of this." Linux-iSCSI.org team |
| */ |
| memset(buf, 0, 32); |
| sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl); |
| if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| |
| if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0) |
| return -1; |
| /* |
| * Set RDMAExtensions=Yes by default for iSER enabled network portals |
| */ |
| if (iser) { |
| struct iscsi_param *param; |
| unsigned long mrdsl, off; |
| int rc; |
| |
| sprintf(buf, "RDMAExtensions=Yes"); |
| if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| /* |
| * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for |
| * Immediate Data + Unsolicitied Data-OUT if necessary.. |
| */ |
| param = iscsi_find_param_from_key("MaxRecvDataSegmentLength", |
| conn->param_list); |
| if (!param) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| rc = strict_strtoul(param->value, 0, &mrdsl); |
| if (rc < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| off = mrdsl % PAGE_SIZE; |
| if (!off) |
| return 0; |
| |
| if (mrdsl < PAGE_SIZE) |
| mrdsl = PAGE_SIZE; |
| else |
| mrdsl -= off; |
| |
| pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down" |
| " to PAGE_SIZE\n", mrdsl); |
| |
| sprintf(buf, "MaxRecvDataSegmentLength=%lu\n", mrdsl); |
| if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Remove PSTATE_NEGOTIATE for the four FIM related keys. |
| * The Initiator node will be able to enable FIM by proposing them itself. |
| */ |
| int iscsi_login_disable_FIM_keys( |
| struct iscsi_param_list *param_list, |
| struct iscsi_conn *conn) |
| { |
| struct iscsi_param *param; |
| |
| param = iscsi_find_param_from_key("OFMarker", param_list); |
| if (!param) { |
| pr_err("iscsi_find_param_from_key() for" |
| " OFMarker failed\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| param->state &= ~PSTATE_NEGOTIATE; |
| |
| param = iscsi_find_param_from_key("OFMarkInt", param_list); |
| if (!param) { |
| pr_err("iscsi_find_param_from_key() for" |
| " IFMarker failed\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| param->state &= ~PSTATE_NEGOTIATE; |
| |
| param = iscsi_find_param_from_key("IFMarker", param_list); |
| if (!param) { |
| pr_err("iscsi_find_param_from_key() for" |
| " IFMarker failed\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| param->state &= ~PSTATE_NEGOTIATE; |
| |
| param = iscsi_find_param_from_key("IFMarkInt", param_list); |
| if (!param) { |
| pr_err("iscsi_find_param_from_key() for" |
| " IFMarker failed\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| param->state &= ~PSTATE_NEGOTIATE; |
| |
| return 0; |
| } |
| |
| static int iscsi_login_non_zero_tsih_s1( |
| struct iscsi_conn *conn, |
| unsigned char *buf) |
| { |
| struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
| |
| iscsi_login_set_conn_values(NULL, conn, pdu->cid); |
| return 0; |
| } |
| |
| /* |
| * Add a new connection to an existing session. |
| */ |
| static int iscsi_login_non_zero_tsih_s2( |
| struct iscsi_conn *conn, |
| unsigned char *buf) |
| { |
| struct iscsi_portal_group *tpg = conn->tpg; |
| struct iscsi_session *sess = NULL, *sess_p = NULL; |
| struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
| struct se_session *se_sess, *se_sess_tmp; |
| struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf; |
| bool iser = false; |
| |
| spin_lock_bh(&se_tpg->session_lock); |
| list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, |
| sess_list) { |
| |
| sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr; |
| if (atomic_read(&sess_p->session_fall_back_to_erl0) || |
| atomic_read(&sess_p->session_logout) || |
| (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) |
| continue; |
| if (!memcmp(sess_p->isid, pdu->isid, 6) && |
| (sess_p->tsih == be16_to_cpu(pdu->tsih))) { |
| iscsit_inc_session_usage_count(sess_p); |
| iscsit_stop_time2retain_timer(sess_p); |
| sess = sess_p; |
| break; |
| } |
| } |
| spin_unlock_bh(&se_tpg->session_lock); |
| |
| /* |
| * If the Time2Retain handler has expired, the session is already gone. |
| */ |
| if (!sess) { |
| pr_err("Initiator attempting to add a connection to" |
| " a non-existent session, rejecting iSCSI Login.\n"); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| ISCSI_LOGIN_STATUS_NO_SESSION); |
| return -1; |
| } |
| |
| /* |
| * Stop the Time2Retain timer if this is a failed session, we restart |
| * the timer if the login is not successful. |
| */ |
| spin_lock_bh(&sess->conn_lock); |
| if (sess->session_state == TARG_SESS_STATE_FAILED) |
| atomic_set(&sess->session_continuation, 1); |
| spin_unlock_bh(&sess->conn_lock); |
| |
| iscsi_login_set_conn_values(sess, conn, pdu->cid); |
| |
| if (iscsi_copy_param_list(&conn->param_list, |
| ISCSI_TPG_C(conn)->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| |
| if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| iser = true; |
| |
| iscsi_set_keys_to_negotiate(conn->param_list, iser); |
| /* |
| * Need to send TargetPortalGroupTag back in first login response |
| * on any iSCSI connection where the Initiator provides TargetName. |
| * See 5.3.1. Login Phase Start |
| * |
| * In our case, we have already located the struct iscsi_tiqn at this point. |
| */ |
| memset(buf, 0, 32); |
| sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt); |
| if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) { |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_NO_RESOURCES); |
| return -1; |
| } |
| |
| return iscsi_login_disable_FIM_keys(conn->param_list, conn); |
| } |
| |
| int iscsi_login_post_auth_non_zero_tsih( |
| struct iscsi_conn *conn, |
| u16 cid, |
| u32 exp_statsn) |
| { |
| struct iscsi_conn *conn_ptr = NULL; |
| struct iscsi_conn_recovery *cr = NULL; |
| struct iscsi_session *sess = conn->sess; |
| |
| /* |
| * By following item 5 in the login table, if we have found |
| * an existing ISID and a valid/existing TSIH and an existing |
| * CID we do connection reinstatement. Currently we dont not |
| * support it so we send back an non-zero status class to the |
| * initiator and release the new connection. |
| */ |
| conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid); |
| if (conn_ptr) { |
| pr_err("Connection exists with CID %hu for %s," |
| " performing connection reinstatement.\n", |
| conn_ptr->cid, sess->sess_ops->InitiatorName); |
| |
| iscsit_connection_reinstatement_rcfr(conn_ptr); |
| iscsit_dec_conn_usage_count(conn_ptr); |
| } |
| |
| /* |
| * Check for any connection recovery entires containing CID. |
| * We use the original ExpStatSN sent in the first login request |
| * to acknowledge commands for the failed connection. |
| * |
| * Also note that an explict logout may have already been sent, |
| * but the response may not be sent due to additional connection |
| * loss. |
| */ |
| if (sess->sess_ops->ErrorRecoveryLevel == 2) { |
| cr = iscsit_get_inactive_connection_recovery_entry( |
| sess, cid); |
| if (cr) { |
| pr_debug("Performing implicit logout" |
| " for connection recovery on CID: %hu\n", |
| conn->cid); |
| iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn); |
| } |
| } |
| |
| /* |
| * Else we follow item 4 from the login table in that we have |
| * found an existing ISID and a valid/existing TSIH and a new |
| * CID we go ahead and continue to add a new connection to the |
| * session. |
| */ |
| pr_debug("Adding CID %hu to existing session for %s.\n", |
| cid, sess->sess_ops->InitiatorName); |
| |
| if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) { |
| pr_err("Adding additional connection to this session" |
| " would exceed MaxConnections %d, login failed.\n", |
| sess->sess_ops->MaxConnections); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| ISCSI_LOGIN_STATUS_ISID_ERROR); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void iscsi_post_login_start_timers(struct iscsi_conn *conn) |
| { |
| struct iscsi_session *sess = conn->sess; |
| /* |
| * FIXME: Unsolicitied NopIN support for ISER |
| */ |
| if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) |
| return; |
| |
| if (!sess->sess_ops->SessionType) |
| iscsit_start_nopin_timer(conn); |
| } |
| |
| static int iscsi_post_login_handler( |
| struct iscsi_np *np, |
| struct iscsi_conn *conn, |
| u8 zero_tsih) |
| { |
| int stop_timer = 0; |
| struct iscsi_session *sess = conn->sess; |
| struct se_session *se_sess = sess->se_sess; |
| struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); |
| struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
| struct iscsi_thread_set *ts; |
| |
| iscsit_inc_conn_usage_count(conn); |
| |
| iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS, |
| ISCSI_LOGIN_STATUS_ACCEPT); |
| |
| pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n"); |
| conn->conn_state = TARG_CONN_STATE_LOGGED_IN; |
| |
| iscsi_set_connection_parameters(conn->conn_ops, conn->param_list); |
| iscsit_set_sync_and_steering_values(conn); |
| /* |
| * SCSI Initiator -> SCSI Target Port Mapping |
| */ |
| ts = iscsi_get_thread_set(); |
| if (!zero_tsih) { |
| iscsi_set_session_parameters(sess->sess_ops, |
| conn->param_list, 0); |
| iscsi_release_param_list(conn->param_list); |
| conn->param_list = NULL; |
| |
| spin_lock_bh(&sess->conn_lock); |
| atomic_set(&sess->session_continuation, 0); |
| if (sess->session_state == TARG_SESS_STATE_FAILED) { |
| pr_debug("Moving to" |
| " TARG_SESS_STATE_LOGGED_IN.\n"); |
| sess->session_state = TARG_SESS_STATE_LOGGED_IN; |
| stop_timer = 1; |
| } |
| |
| pr_debug("iSCSI Login successful on CID: %hu from %s to" |
| " %s:%hu,%hu\n", conn->cid, conn->login_ip, |
| conn->local_ip, conn->local_port, tpg->tpgt); |
| |
| list_add_tail(&conn->conn_list, &sess->sess_conn_list); |
| atomic_inc(&sess->nconn); |
| pr_debug("Incremented iSCSI Connection count to %hu" |
| " from node: %s\n", atomic_read(&sess->nconn), |
| sess->sess_ops->InitiatorName); |
| spin_unlock_bh(&sess->conn_lock); |
| |
| iscsi_post_login_start_timers(conn); |
| |
| iscsi_activate_thread_set(conn, ts); |
| /* |
| * Determine CPU mask to ensure connection's RX and TX kthreads |
| * are scheduled on the same CPU. |
| */ |
| iscsit_thread_get_cpumask(conn); |
| conn->conn_rx_reset_cpumask = 1; |
| conn->conn_tx_reset_cpumask = 1; |
| |
| iscsit_dec_conn_usage_count(conn); |
| if (stop_timer) { |
| spin_lock_bh(&se_tpg->session_lock); |
| iscsit_stop_time2retain_timer(sess); |
| spin_unlock_bh(&se_tpg->session_lock); |
| } |
| iscsit_dec_session_usage_count(sess); |
| return 0; |
| } |
| |
| iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1); |
| iscsi_release_param_list(conn->param_list); |
| conn->param_list = NULL; |
| |
| iscsit_determine_maxcmdsn(sess); |
| |
| spin_lock_bh(&se_tpg->session_lock); |
| __transport_register_session(&sess->tpg->tpg_se_tpg, |
| se_sess->se_node_acl, se_sess, sess); |
| pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n"); |
| sess->session_state = TARG_SESS_STATE_LOGGED_IN; |
| |
| pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n", |
| conn->cid, conn->login_ip, conn->local_ip, conn->local_port, |
| tpg->tpgt); |
| |
| spin_lock_bh(&sess->conn_lock); |
| list_add_tail(&conn->conn_list, &sess->sess_conn_list); |
| atomic_inc(&sess->nconn); |
| pr_debug("Incremented iSCSI Connection count to %hu from node:" |
| " %s\n", atomic_read(&sess->nconn), |
| sess->sess_ops->InitiatorName); |
| spin_unlock_bh(&sess->conn_lock); |
| |
| sess->sid = tpg->sid++; |
| if (!sess->sid) |
| sess->sid = tpg->sid++; |
| pr_debug("Established iSCSI session from node: %s\n", |
| sess->sess_ops->InitiatorName); |
| |
| tpg->nsessions++; |
| if (tpg->tpg_tiqn) |
| tpg->tpg_tiqn->tiqn_nsessions++; |
| |
| pr_debug("Incremented number of active iSCSI sessions to %u on" |
| " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt); |
| spin_unlock_bh(&se_tpg->session_lock); |
| |
| iscsi_post_login_start_timers(conn); |
| iscsi_activate_thread_set(conn, ts); |
| /* |
| * Determine CPU mask to ensure connection's RX and TX kthreads |
| * are scheduled on the same CPU. |
| */ |
| iscsit_thread_get_cpumask(conn); |
| conn->conn_rx_reset_cpumask = 1; |
| conn->conn_tx_reset_cpumask = 1; |
| |
| iscsit_dec_conn_usage_count(conn); |
| |
| return 0; |
| } |
| |
| static void iscsi_handle_login_thread_timeout(unsigned long data) |
| { |
| struct iscsi_np *np = (struct iscsi_np *) data; |
| |
| spin_lock_bh(&np->np_thread_lock); |
| pr_err("iSCSI Login timeout on Network Portal %s:%hu\n", |
| np->np_ip, np->np_port); |
| |
| if (np->np_login_timer_flags & ISCSI_TF_STOP) { |
| spin_unlock_bh(&np->np_thread_lock); |
| return; |
| } |
| |
| if (np->np_thread) |
| send_sig(SIGINT, np->np_thread, 1); |
| |
| np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; |
| spin_unlock_bh(&np->np_thread_lock); |
| } |
| |
| static void iscsi_start_login_thread_timer(struct iscsi_np *np) |
| { |
| /* |
| * This used the TA_LOGIN_TIMEOUT constant because at this |
| * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout |
| */ |
| spin_lock_bh(&np->np_thread_lock); |
| init_timer(&np->np_login_timer); |
| np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ); |
| np->np_login_timer.data = (unsigned long)np; |
| np->np_login_timer.function = iscsi_handle_login_thread_timeout; |
| np->np_login_timer_flags &= ~ISCSI_TF_STOP; |
| np->np_login_timer_flags |= ISCSI_TF_RUNNING; |
| add_timer(&np->np_login_timer); |
| |
| pr_debug("Added timeout timer to iSCSI login request for" |
| " %u seconds.\n", TA_LOGIN_TIMEOUT); |
| spin_unlock_bh(&np->np_thread_lock); |
| } |
| |
| static void iscsi_stop_login_thread_timer(struct iscsi_np *np) |
| { |
| spin_lock_bh(&np->np_thread_lock); |
| if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) { |
| spin_unlock_bh(&np->np_thread_lock); |
| return; |
| } |
| np->np_login_timer_flags |= ISCSI_TF_STOP; |
| spin_unlock_bh(&np->np_thread_lock); |
| |
| del_timer_sync(&np->np_login_timer); |
| |
| spin_lock_bh(&np->np_thread_lock); |
| np->np_login_timer_flags &= ~ISCSI_TF_RUNNING; |
| spin_unlock_bh(&np->np_thread_lock); |
| } |
| |
| int iscsit_setup_np( |
| struct iscsi_np *np, |
| struct __kernel_sockaddr_storage *sockaddr) |
| { |
| struct socket *sock = NULL; |
| int backlog = 5, ret, opt = 0, len; |
| |
| switch (np->np_network_transport) { |
| case ISCSI_TCP: |
| np->np_ip_proto = IPPROTO_TCP; |
| np->np_sock_type = SOCK_STREAM; |
| break; |
| case ISCSI_SCTP_TCP: |
| np->np_ip_proto = IPPROTO_SCTP; |
| np->np_sock_type = SOCK_STREAM; |
| break; |
| case ISCSI_SCTP_UDP: |
| np->np_ip_proto = IPPROTO_SCTP; |
| np->np_sock_type = SOCK_SEQPACKET; |
| break; |
| default: |
| pr_err("Unsupported network_transport: %d\n", |
| np->np_network_transport); |
| return -EINVAL; |
| } |
| |
| np->np_ip_proto = IPPROTO_TCP; |
| np->np_sock_type = SOCK_STREAM; |
| |
| ret = sock_create(sockaddr->ss_family, np->np_sock_type, |
| np->np_ip_proto, &sock); |
| if (ret < 0) { |
| pr_err("sock_create() failed.\n"); |
| return ret; |
| } |
| np->np_socket = sock; |
| /* |
| * Setup the np->np_sockaddr from the passed sockaddr setup |
| * in iscsi_target_configfs.c code.. |
| */ |
| memcpy(&np->np_sockaddr, sockaddr, |
| sizeof(struct __kernel_sockaddr_storage)); |
| |
| if (sockaddr->ss_family == AF_INET6) |
| len = sizeof(struct sockaddr_in6); |
| else |
| len = sizeof(struct sockaddr_in); |
| /* |
| * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY. |
| */ |
| /* FIXME: Someone please explain why this is endian-safe */ |
| opt = 1; |
| if (np->np_network_transport == ISCSI_TCP) { |
| ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, |
| (char *)&opt, sizeof(opt)); |
| if (ret < 0) { |
| pr_err("kernel_setsockopt() for TCP_NODELAY" |
| " failed: %d\n", ret); |
| goto fail; |
| } |
| } |
| |
| /* FIXME: Someone please explain why this is endian-safe */ |
| ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, |
| (char *)&opt, sizeof(opt)); |
| if (ret < 0) { |
| pr_err("kernel_setsockopt() for SO_REUSEADDR" |
| " failed\n"); |
| goto fail; |
| } |
| |
| ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND, |
| (char *)&opt, sizeof(opt)); |
| if (ret < 0) { |
| pr_err("kernel_setsockopt() for IP_FREEBIND" |
| " failed\n"); |
| goto fail; |
| } |
| |
| ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len); |
| if (ret < 0) { |
| pr_err("kernel_bind() failed: %d\n", ret); |
| goto fail; |
| } |
| |
| ret = kernel_listen(sock, backlog); |
| if (ret != 0) { |
| pr_err("kernel_listen() failed: %d\n", ret); |
| goto fail; |
| } |
| |
| return 0; |
| fail: |
| np->np_socket = NULL; |
| if (sock) |
| sock_release(sock); |
| return ret; |
| } |
| |
| int iscsi_target_setup_login_socket( |
| struct iscsi_np *np, |
| struct __kernel_sockaddr_storage *sockaddr) |
| { |
| struct iscsit_transport *t; |
| int rc; |
| |
| t = iscsit_get_transport(np->np_network_transport); |
| if (!t) |
| return -EINVAL; |
| |
| rc = t->iscsit_setup_np(np, sockaddr); |
| if (rc < 0) { |
| iscsit_put_transport(t); |
| return rc; |
| } |
| |
| np->np_transport = t; |
| return 0; |
| } |
| |
| int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) |
| { |
| struct socket *new_sock, *sock = np->np_socket; |
| struct sockaddr_in sock_in; |
| struct sockaddr_in6 sock_in6; |
| int rc, err; |
| |
| rc = kernel_accept(sock, &new_sock, 0); |
| if (rc < 0) |
| return rc; |
| |
| conn->sock = new_sock; |
| conn->login_family = np->np_sockaddr.ss_family; |
| |
| if (np->np_sockaddr.ss_family == AF_INET6) { |
| memset(&sock_in6, 0, sizeof(struct sockaddr_in6)); |
| |
| rc = conn->sock->ops->getname(conn->sock, |
| (struct sockaddr *)&sock_in6, &err, 1); |
| if (!rc) { |
| snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", |
| &sock_in6.sin6_addr.in6_u); |
| conn->login_port = ntohs(sock_in6.sin6_port); |
| } |
| |
| rc = conn->sock->ops->getname(conn->sock, |
| (struct sockaddr *)&sock_in6, &err, 0); |
| if (!rc) { |
| snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", |
| &sock_in6.sin6_addr.in6_u); |
| conn->local_port = ntohs(sock_in6.sin6_port); |
| } |
| } else { |
| memset(&sock_in, 0, sizeof(struct sockaddr_in)); |
| |
| rc = conn->sock->ops->getname(conn->sock, |
| (struct sockaddr *)&sock_in, &err, 1); |
| if (!rc) { |
| sprintf(conn->login_ip, "%pI4", |
| &sock_in.sin_addr.s_addr); |
| conn->login_port = ntohs(sock_in.sin_port); |
| } |
| |
| rc = conn->sock->ops->getname(conn->sock, |
| (struct sockaddr *)&sock_in, &err, 0); |
| if (!rc) { |
| sprintf(conn->local_ip, "%pI4", |
| &sock_in.sin_addr.s_addr); |
| conn->local_port = ntohs(sock_in.sin_port); |
| } |
| } |
| |
| return 0; |
| } |
| |
| int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) |
| { |
| struct iscsi_login_req *login_req; |
| u32 padding = 0, payload_length; |
| |
| if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0) |
| return -1; |
| |
| login_req = (struct iscsi_login_req *)login->req; |
| payload_length = ntoh24(login_req->dlength); |
| padding = ((-payload_length) & 3); |
| |
| pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x," |
| " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n", |
| login_req->flags, login_req->itt, login_req->cmdsn, |
| login_req->exp_statsn, login_req->cid, payload_length); |
| /* |
| * Setup the initial iscsi_login values from the leading |
| * login request PDU. |
| */ |
| if (login->first_request) { |
| login_req = (struct iscsi_login_req *)login->req; |
| login->leading_connection = (!login_req->tsih) ? 1 : 0; |
| login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags); |
| login->version_min = login_req->min_version; |
| login->version_max = login_req->max_version; |
| memcpy(login->isid, login_req->isid, 6); |
| login->cmd_sn = be32_to_cpu(login_req->cmdsn); |
| login->init_task_tag = login_req->itt; |
| login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); |
| login->cid = be16_to_cpu(login_req->cid); |
| login->tsih = be16_to_cpu(login_req->tsih); |
| } |
| |
| if (iscsi_target_check_login_request(conn, login) < 0) |
| return -1; |
| |
| memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS); |
| if (iscsi_login_rx_data(conn, login->req_buf, |
| payload_length + padding) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, |
| u32 length) |
| { |
| if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int |
| iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t) |
| { |
| int rc; |
| |
| if (!t->owner) { |
| conn->conn_transport = t; |
| return 0; |
| } |
| |
| rc = try_module_get(t->owner); |
| if (!rc) { |
| pr_err("try_module_get() failed for %s\n", t->name); |
| return -EINVAL; |
| } |
| |
| conn->conn_transport = t; |
| return 0; |
| } |
| |
| static int __iscsi_target_login_thread(struct iscsi_np *np) |
| { |
| u8 *buffer, zero_tsih = 0; |
| int ret = 0, rc, stop; |
| struct iscsi_conn *conn = NULL; |
| struct iscsi_login *login; |
| struct iscsi_portal_group *tpg = NULL; |
| struct iscsi_login_req *pdu; |
| |
| flush_signals(current); |
| |
| spin_lock_bh(&np->np_thread_lock); |
| if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { |
| np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
| complete(&np->np_restart_comp); |
| } else { |
| np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
| } |
| spin_unlock_bh(&np->np_thread_lock); |
| |
| conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL); |
| if (!conn) { |
| pr_err("Could not allocate memory for" |
| " new connection\n"); |
| /* Get another socket */ |
| return 1; |
| } |
| pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
| conn->conn_state = TARG_CONN_STATE_FREE; |
| |
| if (iscsit_conn_set_transport(conn, np->np_transport) < 0) { |
| kfree(conn); |
| return 1; |
| } |
| |
| rc = np->np_transport->iscsit_accept_np(np, conn); |
| if (rc == -ENOSYS) { |
| complete(&np->np_restart_comp); |
| iscsit_put_transport(conn->conn_transport); |
| kfree(conn); |
| conn = NULL; |
| goto exit; |
| } else if (rc < 0) { |
| spin_lock_bh(&np->np_thread_lock); |
| if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { |
| spin_unlock_bh(&np->np_thread_lock); |
| complete(&np->np_restart_comp); |
| iscsit_put_transport(conn->conn_transport); |
| kfree(conn); |
| conn = NULL; |
| if (ret == -ENODEV) |
| goto out; |
| /* Get another socket */ |
| return 1; |
| } |
| spin_unlock_bh(&np->np_thread_lock); |
| iscsit_put_transport(conn->conn_transport); |
| kfree(conn); |
| conn = NULL; |
| goto out; |
| } |
| /* |
| * Perform the remaining iSCSI connection initialization items.. |
| */ |
| login = iscsi_login_init_conn(conn); |
| if (!login) { |
| goto new_sess_out; |
| } |
| |
| iscsi_start_login_thread_timer(np); |
| |
| pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n"); |
| conn->conn_state = TARG_CONN_STATE_XPT_UP; |
| /* |
| * This will process the first login request + payload.. |
| */ |
| rc = np->np_transport->iscsit_get_login_rx(conn, login); |
| if (rc == 1) |
| return 1; |
| else if (rc < 0) |
| goto new_sess_out; |
| |
| buffer = &login->req[0]; |
| pdu = (struct iscsi_login_req *)buffer; |
| /* |
| * Used by iscsit_tx_login_rsp() for Login Resonses PDUs |
| * when Status-Class != 0. |
| */ |
| conn->login_itt = pdu->itt; |
| |
| spin_lock_bh(&np->np_thread_lock); |
| if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
| spin_unlock_bh(&np->np_thread_lock); |
| pr_err("iSCSI Network Portal on %s:%hu currently not" |
| " active.\n", np->np_ip, np->np_port); |
| iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR, |
| ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE); |
| goto new_sess_out; |
| } |
| spin_unlock_bh(&np->np_thread_lock); |
| |
| conn->network_transport = np->np_network_transport; |
| |
| pr_debug("Received iSCSI login request from %s on %s Network" |
| " Portal %s:%hu\n", conn->login_ip, np->np_transport->name, |
| conn->local_ip, conn->local_port); |
| |
| pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n"); |
| conn->conn_state = TARG_CONN_STATE_IN_LOGIN; |
| |
| if (iscsi_login_check_initiator_version(conn, pdu->max_version, |
| pdu->min_version) < 0) |
| goto new_sess_out; |
| |
| zero_tsih = (pdu->tsih == 0x0000); |
| if (zero_tsih) { |
| /* |
| * This is the leading connection of a new session. |
| * We wait until after authentication to check for |
| * session reinstatement. |
| */ |
| if (iscsi_login_zero_tsih_s1(conn, buffer) < 0) |
| goto new_sess_out; |
| } else { |
| /* |
| * Add a new connection to an existing session. |
| * We check for a non-existant session in |
| * iscsi_login_non_zero_tsih_s2() below based |
| * on ISID/TSIH, but wait until after authentication |
| * to check for connection reinstatement, etc. |
| */ |
| if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0) |
| goto new_sess_out; |
| } |
| /* |
| * SessionType: Discovery |
| * |
| * Locates Default Portal |
| * |
| * SessionType: Normal |
| * |
| * Locates Target Portal from NP -> Target IQN |
| */ |
| rc = iscsi_target_locate_portal(np, conn, login); |
| if (rc < 0) { |
| tpg = conn->tpg; |
| goto new_sess_out; |
| } |
| |
| tpg = conn->tpg; |
| if (!tpg) { |
| pr_err("Unable to locate struct iscsi_conn->tpg\n"); |
| goto new_sess_out; |
| } |
| |
| if (zero_tsih) { |
| if (iscsi_login_zero_tsih_s2(conn) < 0) |
| goto new_sess_out; |
| } else { |
| if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) |
| goto old_sess_out; |
| } |
| |
| if (iscsi_target_start_negotiation(login, conn) < 0) |
| goto new_sess_out; |
| |
| if (!conn->sess) { |
| pr_err("struct iscsi_conn session pointer is NULL!\n"); |
| goto new_sess_out; |
| } |
| |
| iscsi_stop_login_thread_timer(np); |
| |
| if (signal_pending(current)) |
| goto new_sess_out; |
| |
| ret = iscsi_post_login_handler(np, conn, zero_tsih); |
| |
| if (ret < 0) |
| goto new_sess_out; |
| |
| iscsit_deaccess_np(np, tpg); |
| tpg = NULL; |
| /* Get another socket */ |
| return 1; |
| |
| new_sess_out: |
| pr_err("iSCSI Login negotiation failed.\n"); |
| iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR, |
| ISCSI_LOGIN_STATUS_INIT_ERR); |
| if (!zero_tsih || !conn->sess) |
| goto old_sess_out; |
| if (conn->sess->se_sess) |
| transport_free_session(conn->sess->se_sess); |
| if (conn->sess->session_index != 0) { |
| spin_lock_bh(&sess_idr_lock); |
| idr_remove(&sess_idr, conn->sess->session_index); |
| spin_unlock_bh(&sess_idr_lock); |
| } |
| kfree(conn->sess->sess_ops); |
| kfree(conn->sess); |
| old_sess_out: |
| iscsi_stop_login_thread_timer(np); |
| /* |
| * If login negotiation fails check if the Time2Retain timer |
| * needs to be restarted. |
| */ |
| if (!zero_tsih && conn->sess) { |
| spin_lock_bh(&conn->sess->conn_lock); |
| if (conn->sess->session_state == TARG_SESS_STATE_FAILED) { |
| struct se_portal_group *se_tpg = |
| &ISCSI_TPG_C(conn)->tpg_se_tpg; |
| |
| atomic_set(&conn->sess->session_continuation, 0); |
| spin_unlock_bh(&conn->sess->conn_lock); |
| spin_lock_bh(&se_tpg->session_lock); |
| iscsit_start_time2retain_handler(conn->sess); |
| spin_unlock_bh(&se_tpg->session_lock); |
| } else |
| spin_unlock_bh(&conn->sess->conn_lock); |
| iscsit_dec_session_usage_count(conn->sess); |
| } |
| |
| if (!IS_ERR(conn->conn_rx_hash.tfm)) |
| crypto_free_hash(conn->conn_rx_hash.tfm); |
| if (!IS_ERR(conn->conn_tx_hash.tfm)) |
| crypto_free_hash(conn->conn_tx_hash.tfm); |
| |
| if (conn->conn_cpumask) |
| free_cpumask_var(conn->conn_cpumask); |
| |
| kfree(conn->conn_ops); |
| |
| if (conn->param_list) { |
| iscsi_release_param_list(conn->param_list); |
| conn->param_list = NULL; |
| } |
| iscsi_target_nego_release(conn); |
| |
| if (conn->sock) { |
| sock_release(conn->sock); |
| conn->sock = NULL; |
| } |
| |
| if (conn->conn_transport->iscsit_free_conn) |
| conn->conn_transport->iscsit_free_conn(conn); |
| |
| iscsit_put_transport(conn->conn_transport); |
| |
| kfree(conn); |
| |
| if (tpg) { |
| iscsit_deaccess_np(np, tpg); |
| tpg = NULL; |
| } |
| |
| out: |
| stop = kthread_should_stop(); |
| if (!stop && signal_pending(current)) { |
| spin_lock_bh(&np->np_thread_lock); |
| stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN); |
| spin_unlock_bh(&np->np_thread_lock); |
| } |
| /* Wait for another socket.. */ |
| if (!stop) |
| return 1; |
| exit: |
| iscsi_stop_login_thread_timer(np); |
| spin_lock_bh(&np->np_thread_lock); |
| np->np_thread_state = ISCSI_NP_THREAD_EXIT; |
| np->np_thread = NULL; |
| spin_unlock_bh(&np->np_thread_lock); |
| |
| return 0; |
| } |
| |
| int iscsi_target_login_thread(void *arg) |
| { |
| struct iscsi_np *np = arg; |
| int ret; |
| |
| allow_signal(SIGINT); |
| |
| while (!kthread_should_stop()) { |
| ret = __iscsi_target_login_thread(np); |
| /* |
| * We break and exit here unless another sock_accept() call |
| * is expected. |
| */ |
| if (ret != 1) |
| break; |
| } |
| |
| return 0; |
| } |