![Nicholas Bellinger](/assets/img/avatar_default.png)
When shutting down a target there is a race condition between iscsit_del_np() and __iscsi_target_login_thread(). The latter sets the thread pointer to NULL, and the former tries to issue kthread_stop() on that pointer without any synchronization. This patch moves the np->np_thread NULL assignment into iscsit_del_np(), after kthread_stop() has completed. It also removes the signal_pending() + np_state check, and only exits when kthread_should_stop() is true. Reported-by: Hannes Reinecke <hare@suse.de> Cc: <stable@vger.kernel.org> #3.12+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
1437 lines
39 KiB
C
1437 lines
39 KiB
C
/*******************************************************************************
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* This file contains the login functions used by the iSCSI Target driver.
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*
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* (c) Copyright 2007-2013 Datera, Inc.
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*
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* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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******************************************************************************/
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#include <linux/string.h>
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#include <linux/kthread.h>
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#include <linux/crypto.h>
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#include <linux/idr.h>
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#include <scsi/iscsi_proto.h>
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#include <target/target_core_base.h>
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#include <target/target_core_fabric.h>
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#include "iscsi_target_core.h"
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#include "iscsi_target_tq.h"
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#include "iscsi_target_device.h"
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#include "iscsi_target_nego.h"
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#include "iscsi_target_erl0.h"
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#include "iscsi_target_erl2.h"
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#include "iscsi_target_login.h"
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#include "iscsi_target_stat.h"
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#include "iscsi_target_tpg.h"
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#include "iscsi_target_util.h"
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#include "iscsi_target.h"
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#include "iscsi_target_parameters.h"
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#include <target/iscsi/iscsi_transport.h>
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static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
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{
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struct iscsi_login *login;
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login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
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if (!login) {
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pr_err("Unable to allocate memory for struct iscsi_login.\n");
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return NULL;
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}
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conn->login = login;
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login->conn = conn;
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login->first_request = 1;
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login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
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if (!login->req_buf) {
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pr_err("Unable to allocate memory for response buffer.\n");
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goto out_login;
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}
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login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
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if (!login->rsp_buf) {
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pr_err("Unable to allocate memory for request buffer.\n");
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goto out_req_buf;
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}
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conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
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if (!conn->conn_ops) {
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pr_err("Unable to allocate memory for"
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" struct iscsi_conn_ops.\n");
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goto out_rsp_buf;
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}
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init_waitqueue_head(&conn->queues_wq);
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INIT_LIST_HEAD(&conn->conn_list);
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INIT_LIST_HEAD(&conn->conn_cmd_list);
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INIT_LIST_HEAD(&conn->immed_queue_list);
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INIT_LIST_HEAD(&conn->response_queue_list);
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init_completion(&conn->conn_post_wait_comp);
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init_completion(&conn->conn_wait_comp);
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init_completion(&conn->conn_wait_rcfr_comp);
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init_completion(&conn->conn_waiting_on_uc_comp);
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init_completion(&conn->conn_logout_comp);
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init_completion(&conn->rx_half_close_comp);
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init_completion(&conn->tx_half_close_comp);
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spin_lock_init(&conn->cmd_lock);
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spin_lock_init(&conn->conn_usage_lock);
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spin_lock_init(&conn->immed_queue_lock);
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spin_lock_init(&conn->nopin_timer_lock);
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spin_lock_init(&conn->response_queue_lock);
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spin_lock_init(&conn->state_lock);
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if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
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pr_err("Unable to allocate conn->conn_cpumask\n");
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goto out_conn_ops;
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}
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conn->conn_login = login;
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return login;
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out_conn_ops:
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kfree(conn->conn_ops);
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out_rsp_buf:
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kfree(login->rsp_buf);
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out_req_buf:
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kfree(login->req_buf);
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out_login:
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kfree(login);
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return NULL;
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}
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/*
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* Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup
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* per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel
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*/
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int iscsi_login_setup_crypto(struct iscsi_conn *conn)
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{
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/*
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* Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
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* which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
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* to software 1x8 byte slicing from crc32c.ko
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*/
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conn->conn_rx_hash.flags = 0;
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conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
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CRYPTO_ALG_ASYNC);
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if (IS_ERR(conn->conn_rx_hash.tfm)) {
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pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
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return -ENOMEM;
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}
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conn->conn_tx_hash.flags = 0;
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conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
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CRYPTO_ALG_ASYNC);
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if (IS_ERR(conn->conn_tx_hash.tfm)) {
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pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
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crypto_free_hash(conn->conn_rx_hash.tfm);
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return -ENOMEM;
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}
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return 0;
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}
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static int iscsi_login_check_initiator_version(
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struct iscsi_conn *conn,
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u8 version_max,
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u8 version_min)
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{
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if ((version_max != 0x00) || (version_min != 0x00)) {
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pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
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" version Min/Max 0x%02x/0x%02x, rejecting login.\n",
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version_min, version_max);
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_NO_VERSION);
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return -1;
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}
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return 0;
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}
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int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
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{
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int sessiontype;
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struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
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struct iscsi_portal_group *tpg = conn->tpg;
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struct iscsi_session *sess = NULL, *sess_p = NULL;
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struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
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struct se_session *se_sess, *se_sess_tmp;
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initiatorname_param = iscsi_find_param_from_key(
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INITIATORNAME, conn->param_list);
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sessiontype_param = iscsi_find_param_from_key(
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SESSIONTYPE, conn->param_list);
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if (!initiatorname_param || !sessiontype_param) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_MISSING_FIELDS);
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return -1;
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}
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sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
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spin_lock_bh(&se_tpg->session_lock);
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list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
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sess_list) {
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sess_p = se_sess->fabric_sess_ptr;
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spin_lock(&sess_p->conn_lock);
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if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
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atomic_read(&sess_p->session_logout) ||
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(sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
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spin_unlock(&sess_p->conn_lock);
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continue;
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}
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if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
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(!strcmp(sess_p->sess_ops->InitiatorName,
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initiatorname_param->value) &&
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(sess_p->sess_ops->SessionType == sessiontype))) {
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atomic_set(&sess_p->session_reinstatement, 1);
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spin_unlock(&sess_p->conn_lock);
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iscsit_inc_session_usage_count(sess_p);
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iscsit_stop_time2retain_timer(sess_p);
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sess = sess_p;
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break;
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}
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spin_unlock(&sess_p->conn_lock);
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}
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spin_unlock_bh(&se_tpg->session_lock);
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/*
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* If the Time2Retain handler has expired, the session is already gone.
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*/
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if (!sess)
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return 0;
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pr_debug("%s iSCSI Session SID %u is still active for %s,"
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" preforming session reinstatement.\n", (sessiontype) ?
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"Discovery" : "Normal", sess->sid,
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sess->sess_ops->InitiatorName);
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spin_lock_bh(&sess->conn_lock);
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if (sess->session_state == TARG_SESS_STATE_FAILED) {
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spin_unlock_bh(&sess->conn_lock);
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iscsit_dec_session_usage_count(sess);
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target_put_session(sess->se_sess);
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return 0;
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}
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spin_unlock_bh(&sess->conn_lock);
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iscsit_stop_session(sess, 1, 1);
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iscsit_dec_session_usage_count(sess);
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target_put_session(sess->se_sess);
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return 0;
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}
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static void iscsi_login_set_conn_values(
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struct iscsi_session *sess,
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struct iscsi_conn *conn,
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__be16 cid)
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{
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conn->sess = sess;
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conn->cid = be16_to_cpu(cid);
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/*
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* Generate a random Status sequence number (statsn) for the new
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* iSCSI connection.
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*/
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get_random_bytes(&conn->stat_sn, sizeof(u32));
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mutex_lock(&auth_id_lock);
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conn->auth_id = iscsit_global->auth_id++;
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mutex_unlock(&auth_id_lock);
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}
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/*
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* This is the leading connection of a new session,
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* or session reinstatement.
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*/
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static int iscsi_login_zero_tsih_s1(
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struct iscsi_conn *conn,
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unsigned char *buf)
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{
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struct iscsi_session *sess = NULL;
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struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
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int ret;
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sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
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if (!sess) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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pr_err("Could not allocate memory for session\n");
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return -ENOMEM;
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}
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iscsi_login_set_conn_values(sess, conn, pdu->cid);
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sess->init_task_tag = pdu->itt;
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memcpy(&sess->isid, pdu->isid, 6);
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sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn);
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INIT_LIST_HEAD(&sess->sess_conn_list);
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INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
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INIT_LIST_HEAD(&sess->cr_active_list);
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INIT_LIST_HEAD(&sess->cr_inactive_list);
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init_completion(&sess->async_msg_comp);
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init_completion(&sess->reinstatement_comp);
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init_completion(&sess->session_wait_comp);
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init_completion(&sess->session_waiting_on_uc_comp);
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mutex_init(&sess->cmdsn_mutex);
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spin_lock_init(&sess->conn_lock);
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spin_lock_init(&sess->cr_a_lock);
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spin_lock_init(&sess->cr_i_lock);
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spin_lock_init(&sess->session_usage_lock);
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spin_lock_init(&sess->ttt_lock);
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idr_preload(GFP_KERNEL);
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spin_lock_bh(&sess_idr_lock);
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ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
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if (ret >= 0)
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sess->session_index = ret;
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spin_unlock_bh(&sess_idr_lock);
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idr_preload_end();
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if (ret < 0) {
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pr_err("idr_alloc() for sess_idr failed\n");
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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kfree(sess);
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return -ENOMEM;
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}
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sess->creation_time = get_jiffies_64();
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/*
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* The FFP CmdSN window values will be allocated from the TPG's
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* Initiator Node's ACL once the login has been successfully completed.
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*/
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sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn);
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sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
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if (!sess->sess_ops) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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pr_err("Unable to allocate memory for"
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" struct iscsi_sess_ops.\n");
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kfree(sess);
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return -ENOMEM;
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}
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sess->se_sess = transport_init_session();
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if (IS_ERR(sess->se_sess)) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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kfree(sess);
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return -ENOMEM;
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}
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return 0;
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}
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static int iscsi_login_zero_tsih_s2(
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struct iscsi_conn *conn)
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{
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struct iscsi_node_attrib *na;
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struct iscsi_session *sess = conn->sess;
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unsigned char buf[32];
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bool iser = false;
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sess->tpg = conn->tpg;
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/*
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* Assign a new TPG Session Handle. Note this is protected with
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* struct iscsi_portal_group->np_login_sem from iscsit_access_np().
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*/
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sess->tsih = ++sess->tpg->ntsih;
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if (!sess->tsih)
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sess->tsih = ++sess->tpg->ntsih;
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/*
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* Create the default params from user defined values..
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*/
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if (iscsi_copy_param_list(&conn->param_list,
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conn->tpg->param_list, 1) < 0) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
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iser = true;
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iscsi_set_keys_to_negotiate(conn->param_list, iser);
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if (sess->sess_ops->SessionType)
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return iscsi_set_keys_irrelevant_for_discovery(
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conn->param_list);
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na = iscsit_tpg_get_node_attrib(sess);
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/*
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* Need to send TargetPortalGroupTag back in first login response
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* on any iSCSI connection where the Initiator provides TargetName.
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* See 5.3.1. Login Phase Start
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*
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* In our case, we have already located the struct iscsi_tiqn at this point.
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*/
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memset(buf, 0, 32);
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sprintf(buf, "TargetPortalGroupTag=%hu", sess->tpg->tpgt);
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if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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/*
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* Workaround for Initiators that have broken connection recovery logic.
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*
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* "We would really like to get rid of this." Linux-iSCSI.org team
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*/
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memset(buf, 0, 32);
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sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl);
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if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
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return -1;
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/*
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* Set RDMAExtensions=Yes by default for iSER enabled network portals
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*/
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if (iser) {
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struct iscsi_param *param;
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unsigned long mrdsl, off;
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int rc;
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sprintf(buf, "RDMAExtensions=Yes");
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if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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/*
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* Make MaxRecvDataSegmentLength PAGE_SIZE aligned for
|
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* Immediate Data + Unsolicitied Data-OUT if necessary..
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*/
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param = iscsi_find_param_from_key("MaxRecvDataSegmentLength",
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conn->param_list);
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if (!param) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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rc = kstrtoul(param->value, 0, &mrdsl);
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if (rc < 0) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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off = mrdsl % PAGE_SIZE;
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if (!off)
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return 0;
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if (mrdsl < PAGE_SIZE)
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mrdsl = PAGE_SIZE;
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else
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mrdsl -= off;
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pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down"
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" to PAGE_SIZE\n", mrdsl);
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sprintf(buf, "MaxRecvDataSegmentLength=%lu\n", mrdsl);
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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,
|
|
conn->tpg->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", sess->tpg->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);
|
|
}
|
|
|
|
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 = sess->tpg;
|
|
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 = ISCSIT_TCP_BACKLOG, 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) {
|
|
if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr))
|
|
snprintf(conn->login_ip, sizeof(conn->login_ip), "[%pI6c]",
|
|
&sock_in6.sin6_addr.in6_u);
|
|
else
|
|
snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI4",
|
|
&sock_in6.sin6_addr.s6_addr32[3]);
|
|
conn->login_port = ntohs(sock_in6.sin6_port);
|
|
}
|
|
|
|
rc = conn->sock->ops->getname(conn->sock,
|
|
(struct sockaddr *)&sock_in6, &err, 0);
|
|
if (!rc) {
|
|
if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr))
|
|
snprintf(conn->local_ip, sizeof(conn->local_ip), "[%pI6c]",
|
|
&sock_in6.sin6_addr.in6_u);
|
|
else
|
|
snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI4",
|
|
&sock_in6.sin6_addr.s6_addr32[3]);
|
|
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;
|
|
}
|
|
|
|
void iscsi_target_login_sess_out(struct iscsi_conn *conn,
|
|
struct iscsi_np *np, bool zero_tsih, bool new_sess)
|
|
{
|
|
if (new_sess == false)
|
|
goto old_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 =
|
|
&conn->tpg->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);
|
|
}
|
|
|
|
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;
|
|
struct iscsi_tpg_np *tpg_np;
|
|
bool new_sess = false;
|
|
|
|
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;
|
|
}
|
|
login->zero_tsih = zero_tsih;
|
|
|
|
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;
|
|
}
|
|
|
|
ret = iscsi_target_start_negotiation(login, conn);
|
|
if (ret < 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;
|
|
|
|
if (ret == 1) {
|
|
tpg_np = conn->tpg_np;
|
|
|
|
ret = iscsi_post_login_handler(np, conn, zero_tsih);
|
|
if (ret < 0)
|
|
goto new_sess_out;
|
|
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
}
|
|
|
|
tpg = NULL;
|
|
tpg_np = NULL;
|
|
/* Get another socket */
|
|
return 1;
|
|
|
|
new_sess_out:
|
|
new_sess = true;
|
|
old_sess_out:
|
|
tpg_np = conn->tpg_np;
|
|
iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess);
|
|
new_sess = false;
|
|
|
|
if (tpg) {
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
tpg = NULL;
|
|
tpg_np = NULL;
|
|
}
|
|
|
|
out:
|
|
stop = kthread_should_stop();
|
|
/* 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;
|
|
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;
|
|
}
|