1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains main functions related to the iSCSI Target Core Driver. 3e48354ceSNicholas Bellinger * 4e48354ceSNicholas Bellinger * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. 5e48354ceSNicholas Bellinger * 6e48354ceSNicholas Bellinger * Licensed to the Linux Foundation under the General Public License (GPL) version 2. 7e48354ceSNicholas Bellinger * 8e48354ceSNicholas Bellinger * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> 9e48354ceSNicholas Bellinger * 10e48354ceSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 11e48354ceSNicholas Bellinger * it under the terms of the GNU General Public License as published by 12e48354ceSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13e48354ceSNicholas Bellinger * (at your option) any later version. 14e48354ceSNicholas Bellinger * 15e48354ceSNicholas Bellinger * This program is distributed in the hope that it will be useful, 16e48354ceSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17e48354ceSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18e48354ceSNicholas Bellinger * GNU General Public License for more details. 19e48354ceSNicholas Bellinger ******************************************************************************/ 20e48354ceSNicholas Bellinger 21e48354ceSNicholas Bellinger #include <linux/string.h> 22e48354ceSNicholas Bellinger #include <linux/kthread.h> 23e48354ceSNicholas Bellinger #include <linux/crypto.h> 24e48354ceSNicholas Bellinger #include <linux/completion.h> 25827509e3SPaul Gortmaker #include <linux/module.h> 2640401530SAl Viro #include <linux/idr.h> 27e48354ceSNicholas Bellinger #include <asm/unaligned.h> 28e48354ceSNicholas Bellinger #include <scsi/scsi_device.h> 29e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 30d28b1169SAndy Grover #include <scsi/scsi_tcq.h> 31e48354ceSNicholas Bellinger #include <target/target_core_base.h> 32c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 33d28b1169SAndy Grover #include <target/target_core_configfs.h> 34e48354ceSNicholas Bellinger 35e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 39e48354ceSNicholas Bellinger #include "iscsi_target_configfs.h" 40e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 41e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 42e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 43e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 44e48354ceSNicholas Bellinger #include "iscsi_target_login.h" 45e48354ceSNicholas Bellinger #include "iscsi_target_tmr.h" 46e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 47e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 48e48354ceSNicholas Bellinger #include "iscsi_target.h" 49e48354ceSNicholas Bellinger #include "iscsi_target_device.h" 50e48354ceSNicholas Bellinger #include "iscsi_target_stat.h" 51e48354ceSNicholas Bellinger 52e48354ceSNicholas Bellinger static LIST_HEAD(g_tiqn_list); 53e48354ceSNicholas Bellinger static LIST_HEAD(g_np_list); 54e48354ceSNicholas Bellinger static DEFINE_SPINLOCK(tiqn_lock); 55e48354ceSNicholas Bellinger static DEFINE_SPINLOCK(np_lock); 56e48354ceSNicholas Bellinger 57e48354ceSNicholas Bellinger static struct idr tiqn_idr; 58e48354ceSNicholas Bellinger struct idr sess_idr; 59e48354ceSNicholas Bellinger struct mutex auth_id_lock; 60e48354ceSNicholas Bellinger spinlock_t sess_idr_lock; 61e48354ceSNicholas Bellinger 62e48354ceSNicholas Bellinger struct iscsit_global *iscsit_global; 63e48354ceSNicholas Bellinger 64e48354ceSNicholas Bellinger struct kmem_cache *lio_cmd_cache; 65e48354ceSNicholas Bellinger struct kmem_cache *lio_qr_cache; 66e48354ceSNicholas Bellinger struct kmem_cache *lio_dr_cache; 67e48354ceSNicholas Bellinger struct kmem_cache *lio_ooo_cache; 68e48354ceSNicholas Bellinger struct kmem_cache *lio_r2t_cache; 69e48354ceSNicholas Bellinger 70e48354ceSNicholas Bellinger static int iscsit_handle_immediate_data(struct iscsi_cmd *, 71e48354ceSNicholas Bellinger unsigned char *buf, u32); 72e48354ceSNicholas Bellinger static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *); 73e48354ceSNicholas Bellinger 74e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) 75e48354ceSNicholas Bellinger { 76e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = NULL; 77e48354ceSNicholas Bellinger 78e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 79e48354ceSNicholas Bellinger list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { 80e48354ceSNicholas Bellinger if (!strcmp(tiqn->tiqn, buf)) { 81e48354ceSNicholas Bellinger 82e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 83e48354ceSNicholas Bellinger if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { 84e48354ceSNicholas Bellinger tiqn->tiqn_access_count++; 85e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 86e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 87e48354ceSNicholas Bellinger return tiqn; 88e48354ceSNicholas Bellinger } 89e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger } 92e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 93e48354ceSNicholas Bellinger 94e48354ceSNicholas Bellinger return NULL; 95e48354ceSNicholas Bellinger } 96e48354ceSNicholas Bellinger 97e48354ceSNicholas Bellinger static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) 98e48354ceSNicholas Bellinger { 99e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 100e48354ceSNicholas Bellinger if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { 101e48354ceSNicholas Bellinger tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; 102e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 103e48354ceSNicholas Bellinger return 0; 104e48354ceSNicholas Bellinger } 105e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 106e48354ceSNicholas Bellinger 107e48354ceSNicholas Bellinger return -1; 108e48354ceSNicholas Bellinger } 109e48354ceSNicholas Bellinger 110e48354ceSNicholas Bellinger void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) 111e48354ceSNicholas Bellinger { 112e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 113e48354ceSNicholas Bellinger tiqn->tiqn_access_count--; 114e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 115e48354ceSNicholas Bellinger } 116e48354ceSNicholas Bellinger 117e48354ceSNicholas Bellinger /* 118e48354ceSNicholas Bellinger * Note that IQN formatting is expected to be done in userspace, and 119e48354ceSNicholas Bellinger * no explict IQN format checks are done here. 120e48354ceSNicholas Bellinger */ 121e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) 122e48354ceSNicholas Bellinger { 123e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = NULL; 124e48354ceSNicholas Bellinger int ret; 125e48354ceSNicholas Bellinger 1268f50c7f5SDan Carpenter if (strlen(buf) >= ISCSI_IQN_LEN) { 127e48354ceSNicholas Bellinger pr_err("Target IQN exceeds %d bytes\n", 128e48354ceSNicholas Bellinger ISCSI_IQN_LEN); 129e48354ceSNicholas Bellinger return ERR_PTR(-EINVAL); 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); 133e48354ceSNicholas Bellinger if (!tiqn) { 134e48354ceSNicholas Bellinger pr_err("Unable to allocate struct iscsi_tiqn\n"); 135e48354ceSNicholas Bellinger return ERR_PTR(-ENOMEM); 136e48354ceSNicholas Bellinger } 137e48354ceSNicholas Bellinger 138e48354ceSNicholas Bellinger sprintf(tiqn->tiqn, "%s", buf); 139e48354ceSNicholas Bellinger INIT_LIST_HEAD(&tiqn->tiqn_list); 140e48354ceSNicholas Bellinger INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); 141e48354ceSNicholas Bellinger spin_lock_init(&tiqn->tiqn_state_lock); 142e48354ceSNicholas Bellinger spin_lock_init(&tiqn->tiqn_tpg_lock); 143e48354ceSNicholas Bellinger spin_lock_init(&tiqn->sess_err_stats.lock); 144e48354ceSNicholas Bellinger spin_lock_init(&tiqn->login_stats.lock); 145e48354ceSNicholas Bellinger spin_lock_init(&tiqn->logout_stats.lock); 146e48354ceSNicholas Bellinger 147e48354ceSNicholas Bellinger if (!idr_pre_get(&tiqn_idr, GFP_KERNEL)) { 148e48354ceSNicholas Bellinger pr_err("idr_pre_get() for tiqn_idr failed\n"); 149e48354ceSNicholas Bellinger kfree(tiqn); 150e48354ceSNicholas Bellinger return ERR_PTR(-ENOMEM); 151e48354ceSNicholas Bellinger } 152e48354ceSNicholas Bellinger tiqn->tiqn_state = TIQN_STATE_ACTIVE; 153e48354ceSNicholas Bellinger 154e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 155e48354ceSNicholas Bellinger ret = idr_get_new(&tiqn_idr, NULL, &tiqn->tiqn_index); 156e48354ceSNicholas Bellinger if (ret < 0) { 157e48354ceSNicholas Bellinger pr_err("idr_get_new() failed for tiqn->tiqn_index\n"); 158e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 159e48354ceSNicholas Bellinger kfree(tiqn); 160e48354ceSNicholas Bellinger return ERR_PTR(ret); 161e48354ceSNicholas Bellinger } 162e48354ceSNicholas Bellinger list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); 163e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 164e48354ceSNicholas Bellinger 165e48354ceSNicholas Bellinger pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); 166e48354ceSNicholas Bellinger 167e48354ceSNicholas Bellinger return tiqn; 168e48354ceSNicholas Bellinger 169e48354ceSNicholas Bellinger } 170e48354ceSNicholas Bellinger 171e48354ceSNicholas Bellinger static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) 172e48354ceSNicholas Bellinger { 173e48354ceSNicholas Bellinger /* 174e48354ceSNicholas Bellinger * Wait for accesses to said struct iscsi_tiqn to end. 175e48354ceSNicholas Bellinger */ 176e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 177e48354ceSNicholas Bellinger while (tiqn->tiqn_access_count != 0) { 178e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 179e48354ceSNicholas Bellinger msleep(10); 180e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 181e48354ceSNicholas Bellinger } 182e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 183e48354ceSNicholas Bellinger } 184e48354ceSNicholas Bellinger 185e48354ceSNicholas Bellinger void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) 186e48354ceSNicholas Bellinger { 187e48354ceSNicholas Bellinger /* 188e48354ceSNicholas Bellinger * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN 189e48354ceSNicholas Bellinger * while holding tiqn->tiqn_state_lock. This means that all subsequent 190e48354ceSNicholas Bellinger * attempts to access this struct iscsi_tiqn will fail from both transport 191e48354ceSNicholas Bellinger * fabric and control code paths. 192e48354ceSNicholas Bellinger */ 193e48354ceSNicholas Bellinger if (iscsit_set_tiqn_shutdown(tiqn) < 0) { 194e48354ceSNicholas Bellinger pr_err("iscsit_set_tiqn_shutdown() failed\n"); 195e48354ceSNicholas Bellinger return; 196e48354ceSNicholas Bellinger } 197e48354ceSNicholas Bellinger 198e48354ceSNicholas Bellinger iscsit_wait_for_tiqn(tiqn); 199e48354ceSNicholas Bellinger 200e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 201e48354ceSNicholas Bellinger list_del(&tiqn->tiqn_list); 202e48354ceSNicholas Bellinger idr_remove(&tiqn_idr, tiqn->tiqn_index); 203e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 204e48354ceSNicholas Bellinger 205e48354ceSNicholas Bellinger pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", 206e48354ceSNicholas Bellinger tiqn->tiqn); 207e48354ceSNicholas Bellinger kfree(tiqn); 208e48354ceSNicholas Bellinger } 209e48354ceSNicholas Bellinger 210e48354ceSNicholas Bellinger int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) 211e48354ceSNicholas Bellinger { 212e48354ceSNicholas Bellinger int ret; 213e48354ceSNicholas Bellinger /* 214e48354ceSNicholas Bellinger * Determine if the network portal is accepting storage traffic. 215e48354ceSNicholas Bellinger */ 216e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 217e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 218e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 219e48354ceSNicholas Bellinger return -1; 220e48354ceSNicholas Bellinger } 221e48354ceSNicholas Bellinger if (np->np_login_tpg) { 222e48354ceSNicholas Bellinger pr_err("np->np_login_tpg() is not NULL!\n"); 223e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 224e48354ceSNicholas Bellinger return -1; 225e48354ceSNicholas Bellinger } 226e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 227e48354ceSNicholas Bellinger /* 228e48354ceSNicholas Bellinger * Determine if the portal group is accepting storage traffic. 229e48354ceSNicholas Bellinger */ 230e48354ceSNicholas Bellinger spin_lock_bh(&tpg->tpg_state_lock); 231e48354ceSNicholas Bellinger if (tpg->tpg_state != TPG_STATE_ACTIVE) { 232e48354ceSNicholas Bellinger spin_unlock_bh(&tpg->tpg_state_lock); 233e48354ceSNicholas Bellinger return -1; 234e48354ceSNicholas Bellinger } 235e48354ceSNicholas Bellinger spin_unlock_bh(&tpg->tpg_state_lock); 236e48354ceSNicholas Bellinger 237e48354ceSNicholas Bellinger /* 238e48354ceSNicholas Bellinger * Here we serialize access across the TIQN+TPG Tuple. 239e48354ceSNicholas Bellinger */ 240e48354ceSNicholas Bellinger ret = mutex_lock_interruptible(&tpg->np_login_lock); 241e48354ceSNicholas Bellinger if ((ret != 0) || signal_pending(current)) 242e48354ceSNicholas Bellinger return -1; 243e48354ceSNicholas Bellinger 244e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 245e48354ceSNicholas Bellinger np->np_login_tpg = tpg; 246e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 247e48354ceSNicholas Bellinger 248e48354ceSNicholas Bellinger return 0; 249e48354ceSNicholas Bellinger } 250e48354ceSNicholas Bellinger 251e48354ceSNicholas Bellinger int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) 252e48354ceSNicholas Bellinger { 253e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 254e48354ceSNicholas Bellinger 255e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 256e48354ceSNicholas Bellinger np->np_login_tpg = NULL; 257e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 258e48354ceSNicholas Bellinger 259e48354ceSNicholas Bellinger mutex_unlock(&tpg->np_login_lock); 260e48354ceSNicholas Bellinger 261e48354ceSNicholas Bellinger if (tiqn) 262e48354ceSNicholas Bellinger iscsit_put_tiqn_for_login(tiqn); 263e48354ceSNicholas Bellinger 264e48354ceSNicholas Bellinger return 0; 265e48354ceSNicholas Bellinger } 266e48354ceSNicholas Bellinger 267e48354ceSNicholas Bellinger static struct iscsi_np *iscsit_get_np( 268e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr, 269e48354ceSNicholas Bellinger int network_transport) 270e48354ceSNicholas Bellinger { 271e48354ceSNicholas Bellinger struct sockaddr_in *sock_in, *sock_in_e; 272e48354ceSNicholas Bellinger struct sockaddr_in6 *sock_in6, *sock_in6_e; 273e48354ceSNicholas Bellinger struct iscsi_np *np; 274e48354ceSNicholas Bellinger int ip_match = 0; 275e48354ceSNicholas Bellinger u16 port; 276e48354ceSNicholas Bellinger 277e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 278e48354ceSNicholas Bellinger list_for_each_entry(np, &g_np_list, np_list) { 279e48354ceSNicholas Bellinger spin_lock(&np->np_thread_lock); 280e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 281e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 282e48354ceSNicholas Bellinger continue; 283e48354ceSNicholas Bellinger } 284e48354ceSNicholas Bellinger 285e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) { 286e48354ceSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)sockaddr; 287e48354ceSNicholas Bellinger sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; 288e48354ceSNicholas Bellinger 2898359cf43SJörn Engel if (!memcmp(&sock_in6->sin6_addr.in6_u, 2908359cf43SJörn Engel &sock_in6_e->sin6_addr.in6_u, 291e48354ceSNicholas Bellinger sizeof(struct in6_addr))) 292e48354ceSNicholas Bellinger ip_match = 1; 293e48354ceSNicholas Bellinger 294e48354ceSNicholas Bellinger port = ntohs(sock_in6->sin6_port); 295e48354ceSNicholas Bellinger } else { 296e48354ceSNicholas Bellinger sock_in = (struct sockaddr_in *)sockaddr; 297e48354ceSNicholas Bellinger sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; 298e48354ceSNicholas Bellinger 299e48354ceSNicholas Bellinger if (sock_in->sin_addr.s_addr == 300e48354ceSNicholas Bellinger sock_in_e->sin_addr.s_addr) 301e48354ceSNicholas Bellinger ip_match = 1; 302e48354ceSNicholas Bellinger 303e48354ceSNicholas Bellinger port = ntohs(sock_in->sin_port); 304e48354ceSNicholas Bellinger } 305e48354ceSNicholas Bellinger 306e48354ceSNicholas Bellinger if ((ip_match == 1) && (np->np_port == port) && 307e48354ceSNicholas Bellinger (np->np_network_transport == network_transport)) { 308e48354ceSNicholas Bellinger /* 309e48354ceSNicholas Bellinger * Increment the np_exports reference count now to 310e48354ceSNicholas Bellinger * prevent iscsit_del_np() below from being called 311e48354ceSNicholas Bellinger * while iscsi_tpg_add_network_portal() is called. 312e48354ceSNicholas Bellinger */ 313e48354ceSNicholas Bellinger np->np_exports++; 314e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 315e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 316e48354ceSNicholas Bellinger return np; 317e48354ceSNicholas Bellinger } 318e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 319e48354ceSNicholas Bellinger } 320e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 321e48354ceSNicholas Bellinger 322e48354ceSNicholas Bellinger return NULL; 323e48354ceSNicholas Bellinger } 324e48354ceSNicholas Bellinger 325e48354ceSNicholas Bellinger struct iscsi_np *iscsit_add_np( 326e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr, 327e48354ceSNicholas Bellinger char *ip_str, 328e48354ceSNicholas Bellinger int network_transport) 329e48354ceSNicholas Bellinger { 330e48354ceSNicholas Bellinger struct sockaddr_in *sock_in; 331e48354ceSNicholas Bellinger struct sockaddr_in6 *sock_in6; 332e48354ceSNicholas Bellinger struct iscsi_np *np; 333e48354ceSNicholas Bellinger int ret; 334e48354ceSNicholas Bellinger /* 335e48354ceSNicholas Bellinger * Locate the existing struct iscsi_np if already active.. 336e48354ceSNicholas Bellinger */ 337e48354ceSNicholas Bellinger np = iscsit_get_np(sockaddr, network_transport); 338e48354ceSNicholas Bellinger if (np) 339e48354ceSNicholas Bellinger return np; 340e48354ceSNicholas Bellinger 341e48354ceSNicholas Bellinger np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); 342e48354ceSNicholas Bellinger if (!np) { 343e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_np\n"); 344e48354ceSNicholas Bellinger return ERR_PTR(-ENOMEM); 345e48354ceSNicholas Bellinger } 346e48354ceSNicholas Bellinger 347e48354ceSNicholas Bellinger np->np_flags |= NPF_IP_NETWORK; 348e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) { 349e48354ceSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)sockaddr; 350e48354ceSNicholas Bellinger snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); 351e48354ceSNicholas Bellinger np->np_port = ntohs(sock_in6->sin6_port); 352e48354ceSNicholas Bellinger } else { 353e48354ceSNicholas Bellinger sock_in = (struct sockaddr_in *)sockaddr; 354e48354ceSNicholas Bellinger sprintf(np->np_ip, "%s", ip_str); 355e48354ceSNicholas Bellinger np->np_port = ntohs(sock_in->sin_port); 356e48354ceSNicholas Bellinger } 357e48354ceSNicholas Bellinger 358e48354ceSNicholas Bellinger np->np_network_transport = network_transport; 359e48354ceSNicholas Bellinger spin_lock_init(&np->np_thread_lock); 360e48354ceSNicholas Bellinger init_completion(&np->np_restart_comp); 361e48354ceSNicholas Bellinger INIT_LIST_HEAD(&np->np_list); 362e48354ceSNicholas Bellinger 363e48354ceSNicholas Bellinger ret = iscsi_target_setup_login_socket(np, sockaddr); 364e48354ceSNicholas Bellinger if (ret != 0) { 365e48354ceSNicholas Bellinger kfree(np); 366e48354ceSNicholas Bellinger return ERR_PTR(ret); 367e48354ceSNicholas Bellinger } 368e48354ceSNicholas Bellinger 369e48354ceSNicholas Bellinger np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); 370e48354ceSNicholas Bellinger if (IS_ERR(np->np_thread)) { 371e48354ceSNicholas Bellinger pr_err("Unable to create kthread: iscsi_np\n"); 372e48354ceSNicholas Bellinger ret = PTR_ERR(np->np_thread); 373e48354ceSNicholas Bellinger kfree(np); 374e48354ceSNicholas Bellinger return ERR_PTR(ret); 375e48354ceSNicholas Bellinger } 376e48354ceSNicholas Bellinger /* 377e48354ceSNicholas Bellinger * Increment the np_exports reference count now to prevent 378e48354ceSNicholas Bellinger * iscsit_del_np() below from being run while a new call to 379e48354ceSNicholas Bellinger * iscsi_tpg_add_network_portal() for a matching iscsi_np is 380e48354ceSNicholas Bellinger * active. We don't need to hold np->np_thread_lock at this 381e48354ceSNicholas Bellinger * point because iscsi_np has not been added to g_np_list yet. 382e48354ceSNicholas Bellinger */ 383e48354ceSNicholas Bellinger np->np_exports = 1; 384e48354ceSNicholas Bellinger 385e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 386e48354ceSNicholas Bellinger list_add_tail(&np->np_list, &g_np_list); 387e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 388e48354ceSNicholas Bellinger 389e48354ceSNicholas Bellinger pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", 390e48354ceSNicholas Bellinger np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? 391e48354ceSNicholas Bellinger "TCP" : "SCTP"); 392e48354ceSNicholas Bellinger 393e48354ceSNicholas Bellinger return np; 394e48354ceSNicholas Bellinger } 395e48354ceSNicholas Bellinger 396e48354ceSNicholas Bellinger int iscsit_reset_np_thread( 397e48354ceSNicholas Bellinger struct iscsi_np *np, 398e48354ceSNicholas Bellinger struct iscsi_tpg_np *tpg_np, 399e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg) 400e48354ceSNicholas Bellinger { 401e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 402e48354ceSNicholas Bellinger if (tpg && tpg_np) { 403e48354ceSNicholas Bellinger /* 404e48354ceSNicholas Bellinger * The reset operation need only be performed when the 405e48354ceSNicholas Bellinger * passed struct iscsi_portal_group has a login in progress 406e48354ceSNicholas Bellinger * to one of the network portals. 407e48354ceSNicholas Bellinger */ 408e48354ceSNicholas Bellinger if (tpg_np->tpg_np->np_login_tpg != tpg) { 409e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 410e48354ceSNicholas Bellinger return 0; 411e48354ceSNicholas Bellinger } 412e48354ceSNicholas Bellinger } 413e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { 414e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 415e48354ceSNicholas Bellinger return 0; 416e48354ceSNicholas Bellinger } 417e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_RESET; 418e48354ceSNicholas Bellinger 419e48354ceSNicholas Bellinger if (np->np_thread) { 420e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 421e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 422e48354ceSNicholas Bellinger wait_for_completion(&np->np_restart_comp); 423e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 424e48354ceSNicholas Bellinger } 425e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 426e48354ceSNicholas Bellinger 427e48354ceSNicholas Bellinger return 0; 428e48354ceSNicholas Bellinger } 429e48354ceSNicholas Bellinger 430e48354ceSNicholas Bellinger int iscsit_del_np_comm(struct iscsi_np *np) 431e48354ceSNicholas Bellinger { 432bf6932f4SAl Viro if (np->np_socket) 433e48354ceSNicholas Bellinger sock_release(np->np_socket); 434e48354ceSNicholas Bellinger return 0; 435e48354ceSNicholas Bellinger } 436e48354ceSNicholas Bellinger 437e48354ceSNicholas Bellinger int iscsit_del_np(struct iscsi_np *np) 438e48354ceSNicholas Bellinger { 439e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 440e48354ceSNicholas Bellinger np->np_exports--; 441e48354ceSNicholas Bellinger if (np->np_exports) { 442e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 443e48354ceSNicholas Bellinger return 0; 444e48354ceSNicholas Bellinger } 445e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; 446e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 447e48354ceSNicholas Bellinger 448e48354ceSNicholas Bellinger if (np->np_thread) { 449e48354ceSNicholas Bellinger /* 450e48354ceSNicholas Bellinger * We need to send the signal to wakeup Linux/Net 451e48354ceSNicholas Bellinger * which may be sleeping in sock_accept().. 452e48354ceSNicholas Bellinger */ 453e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 454e48354ceSNicholas Bellinger kthread_stop(np->np_thread); 455e48354ceSNicholas Bellinger } 456e48354ceSNicholas Bellinger iscsit_del_np_comm(np); 457e48354ceSNicholas Bellinger 458e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 459e48354ceSNicholas Bellinger list_del(&np->np_list); 460e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 461e48354ceSNicholas Bellinger 462e48354ceSNicholas Bellinger pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", 463e48354ceSNicholas Bellinger np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? 464e48354ceSNicholas Bellinger "TCP" : "SCTP"); 465e48354ceSNicholas Bellinger 466e48354ceSNicholas Bellinger kfree(np); 467e48354ceSNicholas Bellinger return 0; 468e48354ceSNicholas Bellinger } 469e48354ceSNicholas Bellinger 470e48354ceSNicholas Bellinger static int __init iscsi_target_init_module(void) 471e48354ceSNicholas Bellinger { 472e48354ceSNicholas Bellinger int ret = 0; 473e48354ceSNicholas Bellinger 474e48354ceSNicholas Bellinger pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); 475e48354ceSNicholas Bellinger 476e48354ceSNicholas Bellinger iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); 477e48354ceSNicholas Bellinger if (!iscsit_global) { 478e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for iscsit_global\n"); 479e48354ceSNicholas Bellinger return -1; 480e48354ceSNicholas Bellinger } 481e48354ceSNicholas Bellinger mutex_init(&auth_id_lock); 482e48354ceSNicholas Bellinger spin_lock_init(&sess_idr_lock); 483e48354ceSNicholas Bellinger idr_init(&tiqn_idr); 484e48354ceSNicholas Bellinger idr_init(&sess_idr); 485e48354ceSNicholas Bellinger 486e48354ceSNicholas Bellinger ret = iscsi_target_register_configfs(); 487e48354ceSNicholas Bellinger if (ret < 0) 488e48354ceSNicholas Bellinger goto out; 489e48354ceSNicholas Bellinger 490e48354ceSNicholas Bellinger ret = iscsi_thread_set_init(); 491e48354ceSNicholas Bellinger if (ret < 0) 492e48354ceSNicholas Bellinger goto configfs_out; 493e48354ceSNicholas Bellinger 494e48354ceSNicholas Bellinger if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != 495e48354ceSNicholas Bellinger TARGET_THREAD_SET_COUNT) { 496e48354ceSNicholas Bellinger pr_err("iscsi_allocate_thread_sets() returned" 497e48354ceSNicholas Bellinger " unexpected value!\n"); 498e48354ceSNicholas Bellinger goto ts_out1; 499e48354ceSNicholas Bellinger } 500e48354ceSNicholas Bellinger 501e48354ceSNicholas Bellinger lio_cmd_cache = kmem_cache_create("lio_cmd_cache", 502e48354ceSNicholas Bellinger sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), 503e48354ceSNicholas Bellinger 0, NULL); 504e48354ceSNicholas Bellinger if (!lio_cmd_cache) { 505e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 506e48354ceSNicholas Bellinger " lio_cmd_cache\n"); 507e48354ceSNicholas Bellinger goto ts_out2; 508e48354ceSNicholas Bellinger } 509e48354ceSNicholas Bellinger 510e48354ceSNicholas Bellinger lio_qr_cache = kmem_cache_create("lio_qr_cache", 511e48354ceSNicholas Bellinger sizeof(struct iscsi_queue_req), 512e48354ceSNicholas Bellinger __alignof__(struct iscsi_queue_req), 0, NULL); 513e48354ceSNicholas Bellinger if (!lio_qr_cache) { 514e48354ceSNicholas Bellinger pr_err("nable to kmem_cache_create() for" 515e48354ceSNicholas Bellinger " lio_qr_cache\n"); 516e48354ceSNicholas Bellinger goto cmd_out; 517e48354ceSNicholas Bellinger } 518e48354ceSNicholas Bellinger 519e48354ceSNicholas Bellinger lio_dr_cache = kmem_cache_create("lio_dr_cache", 520e48354ceSNicholas Bellinger sizeof(struct iscsi_datain_req), 521e48354ceSNicholas Bellinger __alignof__(struct iscsi_datain_req), 0, NULL); 522e48354ceSNicholas Bellinger if (!lio_dr_cache) { 523e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 524e48354ceSNicholas Bellinger " lio_dr_cache\n"); 525e48354ceSNicholas Bellinger goto qr_out; 526e48354ceSNicholas Bellinger } 527e48354ceSNicholas Bellinger 528e48354ceSNicholas Bellinger lio_ooo_cache = kmem_cache_create("lio_ooo_cache", 529e48354ceSNicholas Bellinger sizeof(struct iscsi_ooo_cmdsn), 530e48354ceSNicholas Bellinger __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); 531e48354ceSNicholas Bellinger if (!lio_ooo_cache) { 532e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 533e48354ceSNicholas Bellinger " lio_ooo_cache\n"); 534e48354ceSNicholas Bellinger goto dr_out; 535e48354ceSNicholas Bellinger } 536e48354ceSNicholas Bellinger 537e48354ceSNicholas Bellinger lio_r2t_cache = kmem_cache_create("lio_r2t_cache", 538e48354ceSNicholas Bellinger sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), 539e48354ceSNicholas Bellinger 0, NULL); 540e48354ceSNicholas Bellinger if (!lio_r2t_cache) { 541e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 542e48354ceSNicholas Bellinger " lio_r2t_cache\n"); 543e48354ceSNicholas Bellinger goto ooo_out; 544e48354ceSNicholas Bellinger } 545e48354ceSNicholas Bellinger 546e48354ceSNicholas Bellinger if (iscsit_load_discovery_tpg() < 0) 547e48354ceSNicholas Bellinger goto r2t_out; 548e48354ceSNicholas Bellinger 549e48354ceSNicholas Bellinger return ret; 550e48354ceSNicholas Bellinger r2t_out: 551e48354ceSNicholas Bellinger kmem_cache_destroy(lio_r2t_cache); 552e48354ceSNicholas Bellinger ooo_out: 553e48354ceSNicholas Bellinger kmem_cache_destroy(lio_ooo_cache); 554e48354ceSNicholas Bellinger dr_out: 555e48354ceSNicholas Bellinger kmem_cache_destroy(lio_dr_cache); 556e48354ceSNicholas Bellinger qr_out: 557e48354ceSNicholas Bellinger kmem_cache_destroy(lio_qr_cache); 558e48354ceSNicholas Bellinger cmd_out: 559e48354ceSNicholas Bellinger kmem_cache_destroy(lio_cmd_cache); 560e48354ceSNicholas Bellinger ts_out2: 561e48354ceSNicholas Bellinger iscsi_deallocate_thread_sets(); 562e48354ceSNicholas Bellinger ts_out1: 563e48354ceSNicholas Bellinger iscsi_thread_set_free(); 564e48354ceSNicholas Bellinger configfs_out: 565e48354ceSNicholas Bellinger iscsi_target_deregister_configfs(); 566e48354ceSNicholas Bellinger out: 567e48354ceSNicholas Bellinger kfree(iscsit_global); 568e48354ceSNicholas Bellinger return -ENOMEM; 569e48354ceSNicholas Bellinger } 570e48354ceSNicholas Bellinger 571e48354ceSNicholas Bellinger static void __exit iscsi_target_cleanup_module(void) 572e48354ceSNicholas Bellinger { 573e48354ceSNicholas Bellinger iscsi_deallocate_thread_sets(); 574e48354ceSNicholas Bellinger iscsi_thread_set_free(); 575e48354ceSNicholas Bellinger iscsit_release_discovery_tpg(); 576e48354ceSNicholas Bellinger kmem_cache_destroy(lio_cmd_cache); 577e48354ceSNicholas Bellinger kmem_cache_destroy(lio_qr_cache); 578e48354ceSNicholas Bellinger kmem_cache_destroy(lio_dr_cache); 579e48354ceSNicholas Bellinger kmem_cache_destroy(lio_ooo_cache); 580e48354ceSNicholas Bellinger kmem_cache_destroy(lio_r2t_cache); 581e48354ceSNicholas Bellinger 582e48354ceSNicholas Bellinger iscsi_target_deregister_configfs(); 583e48354ceSNicholas Bellinger 584e48354ceSNicholas Bellinger kfree(iscsit_global); 585e48354ceSNicholas Bellinger } 586e48354ceSNicholas Bellinger 5878b1e1244SAndy Grover static int iscsit_add_reject( 588e48354ceSNicholas Bellinger u8 reason, 589e48354ceSNicholas Bellinger int fail_conn, 590e48354ceSNicholas Bellinger unsigned char *buf, 591e48354ceSNicholas Bellinger struct iscsi_conn *conn) 592e48354ceSNicholas Bellinger { 593e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 594e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 595e48354ceSNicholas Bellinger int ret; 596e48354ceSNicholas Bellinger 597e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 598e48354ceSNicholas Bellinger if (!cmd) 599e48354ceSNicholas Bellinger return -1; 600e48354ceSNicholas Bellinger 601e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_REJECT; 602e48354ceSNicholas Bellinger if (fail_conn) 603e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; 604e48354ceSNicholas Bellinger 605e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 606e48354ceSNicholas Bellinger hdr->reason = reason; 607e48354ceSNicholas Bellinger 6081c3d5794SThomas Meyer cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); 609e48354ceSNicholas Bellinger if (!cmd->buf_ptr) { 610e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for cmd->buf_ptr\n"); 611e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 612e48354ceSNicholas Bellinger return -1; 613e48354ceSNicholas Bellinger } 614e48354ceSNicholas Bellinger 615e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 6162fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 617e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 618e48354ceSNicholas Bellinger 619e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_REJECT; 620e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 621e48354ceSNicholas Bellinger 622e48354ceSNicholas Bellinger ret = wait_for_completion_interruptible(&cmd->reject_comp); 623e48354ceSNicholas Bellinger if (ret != 0) 624e48354ceSNicholas Bellinger return -1; 625e48354ceSNicholas Bellinger 626e48354ceSNicholas Bellinger return (!fail_conn) ? 0 : -1; 627e48354ceSNicholas Bellinger } 628e48354ceSNicholas Bellinger 629e48354ceSNicholas Bellinger int iscsit_add_reject_from_cmd( 630e48354ceSNicholas Bellinger u8 reason, 631e48354ceSNicholas Bellinger int fail_conn, 632e48354ceSNicholas Bellinger int add_to_conn, 633e48354ceSNicholas Bellinger unsigned char *buf, 634e48354ceSNicholas Bellinger struct iscsi_cmd *cmd) 635e48354ceSNicholas Bellinger { 636e48354ceSNicholas Bellinger struct iscsi_conn *conn; 637e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 638e48354ceSNicholas Bellinger int ret; 639e48354ceSNicholas Bellinger 640e48354ceSNicholas Bellinger if (!cmd->conn) { 641e48354ceSNicholas Bellinger pr_err("cmd->conn is NULL for ITT: 0x%08x\n", 642e48354ceSNicholas Bellinger cmd->init_task_tag); 643e48354ceSNicholas Bellinger return -1; 644e48354ceSNicholas Bellinger } 645e48354ceSNicholas Bellinger conn = cmd->conn; 646e48354ceSNicholas Bellinger 647e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_REJECT; 648e48354ceSNicholas Bellinger if (fail_conn) 649e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; 650e48354ceSNicholas Bellinger 651e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 652e48354ceSNicholas Bellinger hdr->reason = reason; 653e48354ceSNicholas Bellinger 6541c3d5794SThomas Meyer cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); 655e48354ceSNicholas Bellinger if (!cmd->buf_ptr) { 656e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for cmd->buf_ptr\n"); 657e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 658e48354ceSNicholas Bellinger return -1; 659e48354ceSNicholas Bellinger } 660e48354ceSNicholas Bellinger 661e48354ceSNicholas Bellinger if (add_to_conn) { 662e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 6632fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 664e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 665e48354ceSNicholas Bellinger } 666e48354ceSNicholas Bellinger 667e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_REJECT; 668e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 669e48354ceSNicholas Bellinger 670e48354ceSNicholas Bellinger ret = wait_for_completion_interruptible(&cmd->reject_comp); 671e48354ceSNicholas Bellinger if (ret != 0) 672e48354ceSNicholas Bellinger return -1; 673e48354ceSNicholas Bellinger 674e48354ceSNicholas Bellinger return (!fail_conn) ? 0 : -1; 675e48354ceSNicholas Bellinger } 676e48354ceSNicholas Bellinger 677e48354ceSNicholas Bellinger /* 678e48354ceSNicholas Bellinger * Map some portion of the allocated scatterlist to an iovec, suitable for 679bfb79eacSAndy Grover * kernel sockets to copy data in/out. 680e48354ceSNicholas Bellinger */ 681e48354ceSNicholas Bellinger static int iscsit_map_iovec( 682e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 683e48354ceSNicholas Bellinger struct kvec *iov, 684e48354ceSNicholas Bellinger u32 data_offset, 685e48354ceSNicholas Bellinger u32 data_length) 686e48354ceSNicholas Bellinger { 687e48354ceSNicholas Bellinger u32 i = 0; 688e48354ceSNicholas Bellinger struct scatterlist *sg; 689e48354ceSNicholas Bellinger unsigned int page_off; 690e48354ceSNicholas Bellinger 691e48354ceSNicholas Bellinger /* 692bfb79eacSAndy Grover * We know each entry in t_data_sg contains a page. 693e48354ceSNicholas Bellinger */ 694bfb79eacSAndy Grover sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; 695e48354ceSNicholas Bellinger page_off = (data_offset % PAGE_SIZE); 696e48354ceSNicholas Bellinger 697e48354ceSNicholas Bellinger cmd->first_data_sg = sg; 698e48354ceSNicholas Bellinger cmd->first_data_sg_off = page_off; 699e48354ceSNicholas Bellinger 700e48354ceSNicholas Bellinger while (data_length) { 701e48354ceSNicholas Bellinger u32 cur_len = min_t(u32, data_length, sg->length - page_off); 702e48354ceSNicholas Bellinger 703e48354ceSNicholas Bellinger iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; 704e48354ceSNicholas Bellinger iov[i].iov_len = cur_len; 705e48354ceSNicholas Bellinger 706e48354ceSNicholas Bellinger data_length -= cur_len; 707e48354ceSNicholas Bellinger page_off = 0; 708e48354ceSNicholas Bellinger sg = sg_next(sg); 709e48354ceSNicholas Bellinger i++; 710e48354ceSNicholas Bellinger } 711e48354ceSNicholas Bellinger 712e48354ceSNicholas Bellinger cmd->kmapped_nents = i; 713e48354ceSNicholas Bellinger 714e48354ceSNicholas Bellinger return i; 715e48354ceSNicholas Bellinger } 716e48354ceSNicholas Bellinger 717e48354ceSNicholas Bellinger static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) 718e48354ceSNicholas Bellinger { 719e48354ceSNicholas Bellinger u32 i; 720e48354ceSNicholas Bellinger struct scatterlist *sg; 721e48354ceSNicholas Bellinger 722e48354ceSNicholas Bellinger sg = cmd->first_data_sg; 723e48354ceSNicholas Bellinger 724e48354ceSNicholas Bellinger for (i = 0; i < cmd->kmapped_nents; i++) 725e48354ceSNicholas Bellinger kunmap(sg_page(&sg[i])); 726e48354ceSNicholas Bellinger } 727e48354ceSNicholas Bellinger 728e48354ceSNicholas Bellinger static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) 729e48354ceSNicholas Bellinger { 730e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 731e48354ceSNicholas Bellinger 732e48354ceSNicholas Bellinger conn->exp_statsn = exp_statsn; 733e48354ceSNicholas Bellinger 734e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 7352fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 736e48354ceSNicholas Bellinger spin_lock(&cmd->istate_lock); 737e48354ceSNicholas Bellinger if ((cmd->i_state == ISTATE_SENT_STATUS) && 738e48354ceSNicholas Bellinger (cmd->stat_sn < exp_statsn)) { 739e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 740e48354ceSNicholas Bellinger spin_unlock(&cmd->istate_lock); 741e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, 742e48354ceSNicholas Bellinger cmd->i_state); 743e48354ceSNicholas Bellinger continue; 744e48354ceSNicholas Bellinger } 745e48354ceSNicholas Bellinger spin_unlock(&cmd->istate_lock); 746e48354ceSNicholas Bellinger } 747e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 748e48354ceSNicholas Bellinger } 749e48354ceSNicholas Bellinger 750e48354ceSNicholas Bellinger static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) 751e48354ceSNicholas Bellinger { 752f80e8ed3SNicholas Bellinger u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); 753e48354ceSNicholas Bellinger 754c0427f15SChristoph Hellwig iov_count += ISCSI_IOV_DATA_BUFFER; 755e48354ceSNicholas Bellinger 756e48354ceSNicholas Bellinger cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); 757e48354ceSNicholas Bellinger if (!cmd->iov_data) { 758e48354ceSNicholas Bellinger pr_err("Unable to allocate cmd->iov_data\n"); 759e48354ceSNicholas Bellinger return -ENOMEM; 760e48354ceSNicholas Bellinger } 761e48354ceSNicholas Bellinger 762e48354ceSNicholas Bellinger cmd->orig_iov_data_count = iov_count; 763e48354ceSNicholas Bellinger return 0; 764e48354ceSNicholas Bellinger } 765e48354ceSNicholas Bellinger 766e48354ceSNicholas Bellinger static int iscsit_handle_scsi_cmd( 767e48354ceSNicholas Bellinger struct iscsi_conn *conn, 768e48354ceSNicholas Bellinger unsigned char *buf) 769e48354ceSNicholas Bellinger { 770e48354ceSNicholas Bellinger int data_direction, cmdsn_ret = 0, immed_ret, ret, transport_ret; 771e48354ceSNicholas Bellinger int dump_immediate_data = 0, send_check_condition = 0, payload_length; 772e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 773e48354ceSNicholas Bellinger struct iscsi_scsi_req *hdr; 774d28b1169SAndy Grover int iscsi_task_attr; 775d28b1169SAndy Grover int sam_task_attr; 776e48354ceSNicholas Bellinger 777e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 778e48354ceSNicholas Bellinger conn->sess->cmd_pdus++; 779e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 780e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 781e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->num_cmds++; 782e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 783e48354ceSNicholas Bellinger } 784e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 785e48354ceSNicholas Bellinger 786e48354ceSNicholas Bellinger hdr = (struct iscsi_scsi_req *) buf; 787e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 788e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 789e48354ceSNicholas Bellinger hdr->data_length = be32_to_cpu(hdr->data_length); 790e48354ceSNicholas Bellinger hdr->cmdsn = be32_to_cpu(hdr->cmdsn); 791e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 792e48354ceSNicholas Bellinger 793e48354ceSNicholas Bellinger /* FIXME; Add checks for AdditionalHeaderSegment */ 794e48354ceSNicholas Bellinger 795e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && 796e48354ceSNicholas Bellinger !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { 797e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" 798e48354ceSNicholas Bellinger " not set. Bad iSCSI Initiator.\n"); 799e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 800e48354ceSNicholas Bellinger buf, conn); 801e48354ceSNicholas Bellinger } 802e48354ceSNicholas Bellinger 803e48354ceSNicholas Bellinger if (((hdr->flags & ISCSI_FLAG_CMD_READ) || 804e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { 805e48354ceSNicholas Bellinger /* 806e48354ceSNicholas Bellinger * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) 807e48354ceSNicholas Bellinger * that adds support for RESERVE/RELEASE. There is a bug 808e48354ceSNicholas Bellinger * add with this new functionality that sets R/W bits when 809e48354ceSNicholas Bellinger * neither CDB carries any READ or WRITE datapayloads. 810e48354ceSNicholas Bellinger */ 811e48354ceSNicholas Bellinger if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { 812e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_READ; 813e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; 814e48354ceSNicholas Bellinger goto done; 815e48354ceSNicholas Bellinger } 816e48354ceSNicholas Bellinger 817e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" 818e48354ceSNicholas Bellinger " set when Expected Data Transfer Length is 0 for" 819e48354ceSNicholas Bellinger " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); 820e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 821e48354ceSNicholas Bellinger buf, conn); 822e48354ceSNicholas Bellinger } 823e48354ceSNicholas Bellinger done: 824e48354ceSNicholas Bellinger 825e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && 826e48354ceSNicholas Bellinger !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { 827e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" 828e48354ceSNicholas Bellinger " MUST be set if Expected Data Transfer Length is not 0." 829e48354ceSNicholas Bellinger " Bad iSCSI Initiator\n"); 830e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 831e48354ceSNicholas Bellinger buf, conn); 832e48354ceSNicholas Bellinger } 833e48354ceSNicholas Bellinger 834e48354ceSNicholas Bellinger if ((hdr->flags & ISCSI_FLAG_CMD_READ) && 835e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { 836e48354ceSNicholas Bellinger pr_err("Bidirectional operations not supported!\n"); 837e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 838e48354ceSNicholas Bellinger buf, conn); 839e48354ceSNicholas Bellinger } 840e48354ceSNicholas Bellinger 841e48354ceSNicholas Bellinger if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 842e48354ceSNicholas Bellinger pr_err("Illegally set Immediate Bit in iSCSI Initiator" 843e48354ceSNicholas Bellinger " Scsi Command PDU.\n"); 844e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 845e48354ceSNicholas Bellinger buf, conn); 846e48354ceSNicholas Bellinger } 847e48354ceSNicholas Bellinger 848e48354ceSNicholas Bellinger if (payload_length && !conn->sess->sess_ops->ImmediateData) { 849e48354ceSNicholas Bellinger pr_err("ImmediateData=No but DataSegmentLength=%u," 850e48354ceSNicholas Bellinger " protocol error.\n", payload_length); 851e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 852e48354ceSNicholas Bellinger buf, conn); 853e48354ceSNicholas Bellinger } 854e48354ceSNicholas Bellinger 855e48354ceSNicholas Bellinger if ((hdr->data_length == payload_length) && 856e48354ceSNicholas Bellinger (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { 857e48354ceSNicholas Bellinger pr_err("Expected Data Transfer Length and Length of" 858e48354ceSNicholas Bellinger " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" 859e48354ceSNicholas Bellinger " bit is not set protocol error\n"); 860e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 861e48354ceSNicholas Bellinger buf, conn); 862e48354ceSNicholas Bellinger } 863e48354ceSNicholas Bellinger 864e48354ceSNicholas Bellinger if (payload_length > hdr->data_length) { 865e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 866e48354ceSNicholas Bellinger " EDTL: %u, protocol error.\n", payload_length, 867e48354ceSNicholas Bellinger hdr->data_length); 868e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 869e48354ceSNicholas Bellinger buf, conn); 870e48354ceSNicholas Bellinger } 871e48354ceSNicholas Bellinger 872e48354ceSNicholas Bellinger if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { 873e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 874e48354ceSNicholas Bellinger " MaxRecvDataSegmentLength: %u, protocol error.\n", 875e48354ceSNicholas Bellinger payload_length, conn->conn_ops->MaxRecvDataSegmentLength); 876e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 877e48354ceSNicholas Bellinger buf, conn); 878e48354ceSNicholas Bellinger } 879e48354ceSNicholas Bellinger 880e48354ceSNicholas Bellinger if (payload_length > conn->sess->sess_ops->FirstBurstLength) { 881e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 882e48354ceSNicholas Bellinger " FirstBurstLength: %u, protocol error.\n", 883e48354ceSNicholas Bellinger payload_length, conn->sess->sess_ops->FirstBurstLength); 884e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 885e48354ceSNicholas Bellinger buf, conn); 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger 888e48354ceSNicholas Bellinger data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : 889e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : 890e48354ceSNicholas Bellinger DMA_NONE; 891e48354ceSNicholas Bellinger 892d28b1169SAndy Grover cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 893e48354ceSNicholas Bellinger if (!cmd) 894e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, 895e48354ceSNicholas Bellinger buf, conn); 896e48354ceSNicholas Bellinger 897d28b1169SAndy Grover cmd->data_direction = data_direction; 898d28b1169SAndy Grover iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; 899d28b1169SAndy Grover /* 900d28b1169SAndy Grover * Figure out the SAM Task Attribute for the incoming SCSI CDB 901d28b1169SAndy Grover */ 902d28b1169SAndy Grover if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || 903d28b1169SAndy Grover (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) 904d28b1169SAndy Grover sam_task_attr = MSG_SIMPLE_TAG; 905d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) 906d28b1169SAndy Grover sam_task_attr = MSG_ORDERED_TAG; 907d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) 908d28b1169SAndy Grover sam_task_attr = MSG_HEAD_TAG; 909d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_ACA) 910d28b1169SAndy Grover sam_task_attr = MSG_ACA_TAG; 911d28b1169SAndy Grover else { 912d28b1169SAndy Grover pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" 913d28b1169SAndy Grover " MSG_SIMPLE_TAG\n", iscsi_task_attr); 914d28b1169SAndy Grover sam_task_attr = MSG_SIMPLE_TAG; 915d28b1169SAndy Grover } 916d28b1169SAndy Grover 917e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; 918e48354ceSNicholas Bellinger cmd->i_state = ISTATE_NEW_CMD; 919e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 920e48354ceSNicholas Bellinger cmd->immediate_data = (payload_length) ? 1 : 0; 921e48354ceSNicholas Bellinger cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && 922e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); 923e48354ceSNicholas Bellinger if (cmd->unsolicited_data) 924e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; 925e48354ceSNicholas Bellinger 926e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 927e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_READ) { 928e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 929e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 930e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == 0xFFFFFFFF) 931e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 932e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 933e48354ceSNicholas Bellinger } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) 934e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 935e48354ceSNicholas Bellinger cmd->cmd_sn = hdr->cmdsn; 936e48354ceSNicholas Bellinger cmd->exp_stat_sn = hdr->exp_statsn; 937e48354ceSNicholas Bellinger cmd->first_burst_len = payload_length; 938e48354ceSNicholas Bellinger 939e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) { 940e48354ceSNicholas Bellinger struct iscsi_datain_req *dr; 941e48354ceSNicholas Bellinger 942e48354ceSNicholas Bellinger dr = iscsit_allocate_datain_req(); 943e48354ceSNicholas Bellinger if (!dr) 944e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 945e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 946e48354ceSNicholas Bellinger 1, 1, buf, cmd); 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger iscsit_attach_datain_req(cmd, dr); 949e48354ceSNicholas Bellinger } 950e48354ceSNicholas Bellinger 951e48354ceSNicholas Bellinger /* 952065ca1e4SAndy Grover * Initialize struct se_cmd descriptor from target_core_mod infrastructure 953065ca1e4SAndy Grover */ 954065ca1e4SAndy Grover transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, 955ebf1d95cSAndy Grover conn->sess->se_sess, hdr->data_length, cmd->data_direction, 9569c58b7ddSRoland Dreier sam_task_attr, cmd->sense_buffer + 2); 957065ca1e4SAndy Grover 958065ca1e4SAndy Grover pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," 959065ca1e4SAndy Grover " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, 960065ca1e4SAndy Grover hdr->cmdsn, hdr->data_length, payload_length, conn->cid); 961065ca1e4SAndy Grover 962065ca1e4SAndy Grover /* 963e48354ceSNicholas Bellinger * The CDB is going to an se_device_t. 964e48354ceSNicholas Bellinger */ 9654f26998aSAndy Grover ret = transport_lookup_cmd_lun(&cmd->se_cmd, 9664f26998aSAndy Grover scsilun_to_int(&hdr->lun)); 967e48354ceSNicholas Bellinger if (ret < 0) { 968e48354ceSNicholas Bellinger if (cmd->se_cmd.scsi_sense_reason == TCM_NON_EXISTENT_LUN) { 969e48354ceSNicholas Bellinger pr_debug("Responding to non-acl'ed," 970e48354ceSNicholas Bellinger " non-existent or non-exported iSCSI LUN:" 971e48354ceSNicholas Bellinger " 0x%016Lx\n", get_unaligned_le64(&hdr->lun)); 972e48354ceSNicholas Bellinger } 973e48354ceSNicholas Bellinger send_check_condition = 1; 974e48354ceSNicholas Bellinger goto attach_cmd; 975e48354ceSNicholas Bellinger } 976a12f41f8SAndy Grover 977a12f41f8SAndy Grover transport_ret = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); 978e48354ceSNicholas Bellinger if (transport_ret == -ENOMEM) { 979e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 980e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 981e48354ceSNicholas Bellinger 1, 1, buf, cmd); 98200fdc6bbSNicholas Bellinger } else if (transport_ret < 0) { 983e48354ceSNicholas Bellinger /* 984e48354ceSNicholas Bellinger * Unsupported SAM Opcode. CHECK_CONDITION will be sent 985e48354ceSNicholas Bellinger * in iscsit_execute_cmd() during the CmdSN OOO Execution 986e48354ceSNicholas Bellinger * Mechinism. 987e48354ceSNicholas Bellinger */ 988e48354ceSNicholas Bellinger send_check_condition = 1; 989e48354ceSNicholas Bellinger } else { 9904334e49bSAndy Grover if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) 991e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 992e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 993e48354ceSNicholas Bellinger 1, 1, buf, cmd); 994e48354ceSNicholas Bellinger } 995e48354ceSNicholas Bellinger 996e48354ceSNicholas Bellinger attach_cmd: 997e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9982fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 999e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1000e48354ceSNicholas Bellinger /* 1001e48354ceSNicholas Bellinger * Check if we need to delay processing because of ALUA 1002e48354ceSNicholas Bellinger * Active/NonOptimized primary access state.. 1003e48354ceSNicholas Bellinger */ 1004e48354ceSNicholas Bellinger core_alua_check_nonop_delay(&cmd->se_cmd); 1005bfb79eacSAndy Grover 1006bfb79eacSAndy Grover ret = iscsit_allocate_iovecs(cmd); 1007e48354ceSNicholas Bellinger if (ret < 0) 1008e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1009e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1010cd931ee6SNicholas Bellinger 1, 0, buf, cmd); 1011e48354ceSNicholas Bellinger /* 1012e48354ceSNicholas Bellinger * Check the CmdSN against ExpCmdSN/MaxCmdSN here if 1013e48354ceSNicholas Bellinger * the Immediate Bit is not set, and no Immediate 1014e48354ceSNicholas Bellinger * Data is attached. 1015e48354ceSNicholas Bellinger * 1016e48354ceSNicholas Bellinger * A PDU/CmdSN carrying Immediate Data can only 1017e48354ceSNicholas Bellinger * be processed after the DataCRC has passed. 1018e48354ceSNicholas Bellinger * If the DataCRC fails, the CmdSN MUST NOT 1019e48354ceSNicholas Bellinger * be acknowledged. (See below) 1020e48354ceSNicholas Bellinger */ 1021e48354ceSNicholas Bellinger if (!cmd->immediate_data) { 1022e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 10237e32da55SNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) 10247e32da55SNicholas Bellinger return 0; 10257e32da55SNicholas Bellinger else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1026e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1027e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1028e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1029e48354ceSNicholas Bellinger } 1030e48354ceSNicholas Bellinger 1031e48354ceSNicholas Bellinger iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); 1032e48354ceSNicholas Bellinger 1033e48354ceSNicholas Bellinger /* 1034e48354ceSNicholas Bellinger * If no Immediate Data is attached, it's OK to return now. 1035e48354ceSNicholas Bellinger */ 1036e48354ceSNicholas Bellinger if (!cmd->immediate_data) { 1037e48354ceSNicholas Bellinger if (send_check_condition) 1038e48354ceSNicholas Bellinger return 0; 1039e48354ceSNicholas Bellinger 1040e48354ceSNicholas Bellinger if (cmd->unsolicited_data) { 1041e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 1042e48354ceSNicholas Bellinger 1043e48354ceSNicholas Bellinger spin_lock_bh(&cmd->dataout_timeout_lock); 1044e48354ceSNicholas Bellinger iscsit_start_dataout_timer(cmd, cmd->conn); 1045e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->dataout_timeout_lock); 1046e48354ceSNicholas Bellinger } 1047e48354ceSNicholas Bellinger 1048e48354ceSNicholas Bellinger return 0; 1049e48354ceSNicholas Bellinger } 1050e48354ceSNicholas Bellinger 1051e48354ceSNicholas Bellinger /* 1052e48354ceSNicholas Bellinger * Early CHECK_CONDITIONs never make it to the transport processing 1053e48354ceSNicholas Bellinger * thread. They are processed in CmdSN order by 1054e48354ceSNicholas Bellinger * iscsit_check_received_cmdsn() below. 1055e48354ceSNicholas Bellinger */ 1056e48354ceSNicholas Bellinger if (send_check_condition) { 1057e48354ceSNicholas Bellinger immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; 1058e48354ceSNicholas Bellinger dump_immediate_data = 1; 1059e48354ceSNicholas Bellinger goto after_immediate_data; 1060e48354ceSNicholas Bellinger } 1061e48354ceSNicholas Bellinger /* 1062e48354ceSNicholas Bellinger * Call directly into transport_generic_new_cmd() to perform 1063e48354ceSNicholas Bellinger * the backend memory allocation. 1064e48354ceSNicholas Bellinger */ 1065e48354ceSNicholas Bellinger ret = transport_generic_new_cmd(&cmd->se_cmd); 106603e98c9eSNicholas Bellinger if (ret < 0) { 1067e48354ceSNicholas Bellinger immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; 1068e48354ceSNicholas Bellinger dump_immediate_data = 1; 1069e48354ceSNicholas Bellinger goto after_immediate_data; 1070e48354ceSNicholas Bellinger } 1071e48354ceSNicholas Bellinger 1072e48354ceSNicholas Bellinger immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length); 1073e48354ceSNicholas Bellinger after_immediate_data: 1074e48354ceSNicholas Bellinger if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { 1075e48354ceSNicholas Bellinger /* 1076e48354ceSNicholas Bellinger * A PDU/CmdSN carrying Immediate Data passed 1077e48354ceSNicholas Bellinger * DataCRC, check against ExpCmdSN/MaxCmdSN if 1078e48354ceSNicholas Bellinger * Immediate Bit is not set. 1079e48354ceSNicholas Bellinger */ 1080e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1081e48354ceSNicholas Bellinger /* 1082e48354ceSNicholas Bellinger * Special case for Unsupported SAM WRITE Opcodes 1083e48354ceSNicholas Bellinger * and ImmediateData=Yes. 1084e48354ceSNicholas Bellinger */ 1085e48354ceSNicholas Bellinger if (dump_immediate_data) { 1086e48354ceSNicholas Bellinger if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) 1087e48354ceSNicholas Bellinger return -1; 1088e48354ceSNicholas Bellinger } else if (cmd->unsolicited_data) { 1089e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 1090e48354ceSNicholas Bellinger 1091e48354ceSNicholas Bellinger spin_lock_bh(&cmd->dataout_timeout_lock); 1092e48354ceSNicholas Bellinger iscsit_start_dataout_timer(cmd, cmd->conn); 1093e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->dataout_timeout_lock); 1094e48354ceSNicholas Bellinger } 1095e48354ceSNicholas Bellinger 1096e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1097e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1098e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1099e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1100e48354ceSNicholas Bellinger 1101e48354ceSNicholas Bellinger } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { 1102e48354ceSNicholas Bellinger /* 1103e48354ceSNicholas Bellinger * Immediate Data failed DataCRC and ERL>=1, 1104e48354ceSNicholas Bellinger * silently drop this PDU and let the initiator 1105e48354ceSNicholas Bellinger * plug the CmdSN gap. 1106e48354ceSNicholas Bellinger * 1107e48354ceSNicholas Bellinger * FIXME: Send Unsolicited NOPIN with reserved 1108e48354ceSNicholas Bellinger * TTT here to help the initiator figure out 1109e48354ceSNicholas Bellinger * the missing CmdSN, although they should be 1110e48354ceSNicholas Bellinger * intelligent enough to determine the missing 1111e48354ceSNicholas Bellinger * CmdSN and issue a retry to plug the sequence. 1112e48354ceSNicholas Bellinger */ 1113e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 1114e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 1115e48354ceSNicholas Bellinger } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ 1116e48354ceSNicholas Bellinger return -1; 1117e48354ceSNicholas Bellinger 1118e48354ceSNicholas Bellinger return 0; 1119e48354ceSNicholas Bellinger } 1120e48354ceSNicholas Bellinger 1121e48354ceSNicholas Bellinger static u32 iscsit_do_crypto_hash_sg( 1122e48354ceSNicholas Bellinger struct hash_desc *hash, 1123e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1124e48354ceSNicholas Bellinger u32 data_offset, 1125e48354ceSNicholas Bellinger u32 data_length, 1126e48354ceSNicholas Bellinger u32 padding, 1127e48354ceSNicholas Bellinger u8 *pad_bytes) 1128e48354ceSNicholas Bellinger { 1129e48354ceSNicholas Bellinger u32 data_crc; 1130e48354ceSNicholas Bellinger u32 i; 1131e48354ceSNicholas Bellinger struct scatterlist *sg; 1132e48354ceSNicholas Bellinger unsigned int page_off; 1133e48354ceSNicholas Bellinger 1134e48354ceSNicholas Bellinger crypto_hash_init(hash); 1135e48354ceSNicholas Bellinger 1136e48354ceSNicholas Bellinger sg = cmd->first_data_sg; 1137e48354ceSNicholas Bellinger page_off = cmd->first_data_sg_off; 1138e48354ceSNicholas Bellinger 1139e48354ceSNicholas Bellinger i = 0; 1140e48354ceSNicholas Bellinger while (data_length) { 1141e48354ceSNicholas Bellinger u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); 1142e48354ceSNicholas Bellinger 1143e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg[i], cur_len); 1144e48354ceSNicholas Bellinger 1145e48354ceSNicholas Bellinger data_length -= cur_len; 1146e48354ceSNicholas Bellinger page_off = 0; 1147e48354ceSNicholas Bellinger i++; 1148e48354ceSNicholas Bellinger } 1149e48354ceSNicholas Bellinger 1150e48354ceSNicholas Bellinger if (padding) { 1151e48354ceSNicholas Bellinger struct scatterlist pad_sg; 1152e48354ceSNicholas Bellinger 1153e48354ceSNicholas Bellinger sg_init_one(&pad_sg, pad_bytes, padding); 1154e48354ceSNicholas Bellinger crypto_hash_update(hash, &pad_sg, padding); 1155e48354ceSNicholas Bellinger } 1156e48354ceSNicholas Bellinger crypto_hash_final(hash, (u8 *) &data_crc); 1157e48354ceSNicholas Bellinger 1158e48354ceSNicholas Bellinger return data_crc; 1159e48354ceSNicholas Bellinger } 1160e48354ceSNicholas Bellinger 1161e48354ceSNicholas Bellinger static void iscsit_do_crypto_hash_buf( 1162e48354ceSNicholas Bellinger struct hash_desc *hash, 1163e48354ceSNicholas Bellinger unsigned char *buf, 1164e48354ceSNicholas Bellinger u32 payload_length, 1165e48354ceSNicholas Bellinger u32 padding, 1166e48354ceSNicholas Bellinger u8 *pad_bytes, 1167e48354ceSNicholas Bellinger u8 *data_crc) 1168e48354ceSNicholas Bellinger { 1169e48354ceSNicholas Bellinger struct scatterlist sg; 1170e48354ceSNicholas Bellinger 1171e48354ceSNicholas Bellinger crypto_hash_init(hash); 1172e48354ceSNicholas Bellinger 11738359cf43SJörn Engel sg_init_one(&sg, buf, payload_length); 1174e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg, payload_length); 1175e48354ceSNicholas Bellinger 1176e48354ceSNicholas Bellinger if (padding) { 1177e48354ceSNicholas Bellinger sg_init_one(&sg, pad_bytes, padding); 1178e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg, padding); 1179e48354ceSNicholas Bellinger } 1180e48354ceSNicholas Bellinger crypto_hash_final(hash, data_crc); 1181e48354ceSNicholas Bellinger } 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) 1184e48354ceSNicholas Bellinger { 1185e48354ceSNicholas Bellinger int iov_ret, ooo_cmdsn = 0, ret; 1186e48354ceSNicholas Bellinger u8 data_crc_failed = 0; 1187e48354ceSNicholas Bellinger u32 checksum, iov_count = 0, padding = 0, rx_got = 0; 1188e48354ceSNicholas Bellinger u32 rx_size = 0, payload_length; 1189e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1190e48354ceSNicholas Bellinger struct se_cmd *se_cmd; 1191e48354ceSNicholas Bellinger struct iscsi_data *hdr; 1192e48354ceSNicholas Bellinger struct kvec *iov; 1193e48354ceSNicholas Bellinger unsigned long flags; 1194e48354ceSNicholas Bellinger 1195e48354ceSNicholas Bellinger hdr = (struct iscsi_data *) buf; 1196e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1197e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 1198e48354ceSNicholas Bellinger hdr->ttt = be32_to_cpu(hdr->ttt); 1199e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 1200e48354ceSNicholas Bellinger hdr->datasn = be32_to_cpu(hdr->datasn); 1201e48354ceSNicholas Bellinger hdr->offset = be32_to_cpu(hdr->offset); 1202e48354ceSNicholas Bellinger 1203e48354ceSNicholas Bellinger if (!payload_length) { 1204e48354ceSNicholas Bellinger pr_err("DataOUT payload is ZERO, protocol error.\n"); 1205e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1206e48354ceSNicholas Bellinger buf, conn); 1207e48354ceSNicholas Bellinger } 1208e48354ceSNicholas Bellinger 1209e48354ceSNicholas Bellinger /* iSCSI write */ 1210e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 1211e48354ceSNicholas Bellinger conn->sess->rx_data_octets += payload_length; 1212e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 1213e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 1214e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->write_bytes += payload_length; 1215e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 1216e48354ceSNicholas Bellinger } 1217e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 1218e48354ceSNicholas Bellinger 1219e48354ceSNicholas Bellinger if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { 1220e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 1221e48354ceSNicholas Bellinger " MaxRecvDataSegmentLength: %u\n", payload_length, 1222e48354ceSNicholas Bellinger conn->conn_ops->MaxRecvDataSegmentLength); 1223e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1224e48354ceSNicholas Bellinger buf, conn); 1225e48354ceSNicholas Bellinger } 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, 1228e48354ceSNicholas Bellinger payload_length); 1229e48354ceSNicholas Bellinger if (!cmd) 1230e48354ceSNicholas Bellinger return 0; 1231e48354ceSNicholas Bellinger 1232e48354ceSNicholas Bellinger pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," 1233e48354ceSNicholas Bellinger " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", 1234e48354ceSNicholas Bellinger hdr->itt, hdr->ttt, hdr->datasn, hdr->offset, 1235e48354ceSNicholas Bellinger payload_length, conn->cid); 1236e48354ceSNicholas Bellinger 1237e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { 1238e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x received DataOUT after" 1239e48354ceSNicholas Bellinger " last DataOUT received, dumping payload\n", 1240e48354ceSNicholas Bellinger cmd->init_task_tag); 1241e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1242e48354ceSNicholas Bellinger } 1243e48354ceSNicholas Bellinger 1244e48354ceSNicholas Bellinger if (cmd->data_direction != DMA_TO_DEVICE) { 1245e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x received DataOUT for a" 1246e48354ceSNicholas Bellinger " NON-WRITE command.\n", cmd->init_task_tag); 1247e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, 1248e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1249e48354ceSNicholas Bellinger } 1250e48354ceSNicholas Bellinger se_cmd = &cmd->se_cmd; 1251e48354ceSNicholas Bellinger iscsit_mod_dataout_timer(cmd); 1252e48354ceSNicholas Bellinger 1253ebf1d95cSAndy Grover if ((hdr->offset + payload_length) > cmd->se_cmd.data_length) { 1254e48354ceSNicholas Bellinger pr_err("DataOut Offset: %u, Length %u greater than" 1255e48354ceSNicholas Bellinger " iSCSI Command EDTL %u, protocol error.\n", 1256ebf1d95cSAndy Grover hdr->offset, payload_length, cmd->se_cmd.data_length); 1257e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, 1258e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1259e48354ceSNicholas Bellinger } 1260e48354ceSNicholas Bellinger 1261e48354ceSNicholas Bellinger if (cmd->unsolicited_data) { 1262e48354ceSNicholas Bellinger int dump_unsolicited_data = 0; 1263e48354ceSNicholas Bellinger 1264e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 1265e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 1266e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 1267e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(&cmd->se_cmd, 1268e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 1269e48354ceSNicholas Bellinger return -1; 1270e48354ceSNicholas Bellinger } 1271e48354ceSNicholas Bellinger /* 1272e48354ceSNicholas Bellinger * Special case for dealing with Unsolicited DataOUT 1273e48354ceSNicholas Bellinger * and Unsupported SAM WRITE Opcodes and SE resource allocation 1274e48354ceSNicholas Bellinger * failures; 1275e48354ceSNicholas Bellinger */ 1276e48354ceSNicholas Bellinger 1277e48354ceSNicholas Bellinger /* Something's amiss if we're not in WRITE_PENDING state... */ 1278e48354ceSNicholas Bellinger spin_lock_irqsave(&se_cmd->t_state_lock, flags); 1279e48354ceSNicholas Bellinger WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); 1280e48354ceSNicholas Bellinger spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 1281e48354ceSNicholas Bellinger 1282e48354ceSNicholas Bellinger spin_lock_irqsave(&se_cmd->t_state_lock, flags); 1283e48354ceSNicholas Bellinger if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) || 128403e98c9eSNicholas Bellinger (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION)) 1285e48354ceSNicholas Bellinger dump_unsolicited_data = 1; 1286e48354ceSNicholas Bellinger spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 1287e48354ceSNicholas Bellinger 1288e48354ceSNicholas Bellinger if (dump_unsolicited_data) { 1289e48354ceSNicholas Bellinger /* 1290e48354ceSNicholas Bellinger * Check if a delayed TASK_ABORTED status needs to 1291e48354ceSNicholas Bellinger * be sent now if the ISCSI_FLAG_CMD_FINAL has been 1292e48354ceSNicholas Bellinger * received with the unsolicitied data out. 1293e48354ceSNicholas Bellinger */ 1294e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_FINAL) 1295e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1296e48354ceSNicholas Bellinger 1297e48354ceSNicholas Bellinger transport_check_aborted_status(se_cmd, 1298e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_FINAL)); 1299e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1300e48354ceSNicholas Bellinger } 1301e48354ceSNicholas Bellinger } else { 1302e48354ceSNicholas Bellinger /* 1303e48354ceSNicholas Bellinger * For the normal solicited data path: 1304e48354ceSNicholas Bellinger * 1305e48354ceSNicholas Bellinger * Check for a delayed TASK_ABORTED status and dump any 1306e48354ceSNicholas Bellinger * incoming data out payload if one exists. Also, when the 1307e48354ceSNicholas Bellinger * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current 1308e48354ceSNicholas Bellinger * data out sequence, we decrement outstanding_r2ts. Once 1309e48354ceSNicholas Bellinger * outstanding_r2ts reaches zero, go ahead and send the delayed 1310e48354ceSNicholas Bellinger * TASK_ABORTED status. 1311e48354ceSNicholas Bellinger */ 13127d680f3bSChristoph Hellwig if (se_cmd->transport_state & CMD_T_ABORTED) { 1313e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_FINAL) 1314e48354ceSNicholas Bellinger if (--cmd->outstanding_r2ts < 1) { 1315e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1316e48354ceSNicholas Bellinger transport_check_aborted_status( 1317e48354ceSNicholas Bellinger se_cmd, 1); 1318e48354ceSNicholas Bellinger } 1319e48354ceSNicholas Bellinger 1320e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1321e48354ceSNicholas Bellinger } 1322e48354ceSNicholas Bellinger } 1323e48354ceSNicholas Bellinger /* 1324e48354ceSNicholas Bellinger * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and 1325e48354ceSNicholas Bellinger * within-command recovery checks before receiving the payload. 1326e48354ceSNicholas Bellinger */ 1327e48354ceSNicholas Bellinger ret = iscsit_check_pre_dataout(cmd, buf); 1328e48354ceSNicholas Bellinger if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY) 1329e48354ceSNicholas Bellinger return 0; 1330e48354ceSNicholas Bellinger else if (ret == DATAOUT_CANNOT_RECOVER) 1331e48354ceSNicholas Bellinger return -1; 1332e48354ceSNicholas Bellinger 1333e48354ceSNicholas Bellinger rx_size += payload_length; 1334e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1335e48354ceSNicholas Bellinger 1336e48354ceSNicholas Bellinger iov_ret = iscsit_map_iovec(cmd, iov, hdr->offset, payload_length); 1337e48354ceSNicholas Bellinger if (iov_ret < 0) 1338e48354ceSNicholas Bellinger return -1; 1339e48354ceSNicholas Bellinger 1340e48354ceSNicholas Bellinger iov_count += iov_ret; 1341e48354ceSNicholas Bellinger 1342e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1343e48354ceSNicholas Bellinger if (padding != 0) { 1344e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 1345e48354ceSNicholas Bellinger iov[iov_count++].iov_len = padding; 1346e48354ceSNicholas Bellinger rx_size += padding; 1347e48354ceSNicholas Bellinger pr_debug("Receiving %u padding bytes.\n", padding); 1348e48354ceSNicholas Bellinger } 1349e48354ceSNicholas Bellinger 1350e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1351e48354ceSNicholas Bellinger iov[iov_count].iov_base = &checksum; 1352e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 1353e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1354e48354ceSNicholas Bellinger } 1355e48354ceSNicholas Bellinger 1356e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); 1357e48354ceSNicholas Bellinger 1358e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 1359e48354ceSNicholas Bellinger 1360e48354ceSNicholas Bellinger if (rx_got != rx_size) 1361e48354ceSNicholas Bellinger return -1; 1362e48354ceSNicholas Bellinger 1363e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1364e48354ceSNicholas Bellinger u32 data_crc; 1365e48354ceSNicholas Bellinger 1366e48354ceSNicholas Bellinger data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, 1367e48354ceSNicholas Bellinger hdr->offset, payload_length, padding, 1368e48354ceSNicholas Bellinger cmd->pad_bytes); 1369e48354ceSNicholas Bellinger 1370e48354ceSNicholas Bellinger if (checksum != data_crc) { 1371e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x, Offset: %u, Length: %u," 1372e48354ceSNicholas Bellinger " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" 1373e48354ceSNicholas Bellinger " does not match computed 0x%08x\n", 1374e48354ceSNicholas Bellinger hdr->itt, hdr->offset, payload_length, 1375e48354ceSNicholas Bellinger hdr->datasn, checksum, data_crc); 1376e48354ceSNicholas Bellinger data_crc_failed = 1; 1377e48354ceSNicholas Bellinger } else { 1378e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest 0x%08x for" 1379e48354ceSNicholas Bellinger " %u bytes of Data Out\n", checksum, 1380e48354ceSNicholas Bellinger payload_length); 1381e48354ceSNicholas Bellinger } 1382e48354ceSNicholas Bellinger } 1383e48354ceSNicholas Bellinger /* 1384e48354ceSNicholas Bellinger * Increment post receive data and CRC values or perform 1385e48354ceSNicholas Bellinger * within-command recovery. 1386e48354ceSNicholas Bellinger */ 1387e48354ceSNicholas Bellinger ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed); 1388e48354ceSNicholas Bellinger if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)) 1389e48354ceSNicholas Bellinger return 0; 1390e48354ceSNicholas Bellinger else if (ret == DATAOUT_SEND_R2T) { 1391e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 13928b1e1244SAndy Grover iscsit_build_r2ts_for_cmd(cmd, conn, false); 1393e48354ceSNicholas Bellinger } else if (ret == DATAOUT_SEND_TO_TRANSPORT) { 1394e48354ceSNicholas Bellinger /* 1395e48354ceSNicholas Bellinger * Handle extra special case for out of order 1396e48354ceSNicholas Bellinger * Unsolicited Data Out. 1397e48354ceSNicholas Bellinger */ 1398e48354ceSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1399e48354ceSNicholas Bellinger ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); 1400e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1401e48354ceSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1402e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1403e48354ceSNicholas Bellinger 1404e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 140567441b68SChristoph Hellwig if (ooo_cmdsn) 140667441b68SChristoph Hellwig return 0; 140767441b68SChristoph Hellwig target_execute_cmd(&cmd->se_cmd); 140867441b68SChristoph Hellwig return 0; 1409e48354ceSNicholas Bellinger } else /* DATAOUT_CANNOT_RECOVER */ 1410e48354ceSNicholas Bellinger return -1; 1411e48354ceSNicholas Bellinger 1412e48354ceSNicholas Bellinger return 0; 1413e48354ceSNicholas Bellinger } 1414e48354ceSNicholas Bellinger 1415e48354ceSNicholas Bellinger static int iscsit_handle_nop_out( 1416e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1417e48354ceSNicholas Bellinger unsigned char *buf) 1418e48354ceSNicholas Bellinger { 1419e48354ceSNicholas Bellinger unsigned char *ping_data = NULL; 1420e48354ceSNicholas Bellinger int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; 1421e48354ceSNicholas Bellinger u32 checksum, data_crc, padding = 0, payload_length; 1422e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1423e48354ceSNicholas Bellinger struct kvec *iov = NULL; 1424e48354ceSNicholas Bellinger struct iscsi_nopout *hdr; 1425e48354ceSNicholas Bellinger 1426e48354ceSNicholas Bellinger hdr = (struct iscsi_nopout *) buf; 1427e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1428e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 1429e48354ceSNicholas Bellinger hdr->ttt = be32_to_cpu(hdr->ttt); 1430e48354ceSNicholas Bellinger hdr->cmdsn = be32_to_cpu(hdr->cmdsn); 1431e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 1432e48354ceSNicholas Bellinger 1433e48354ceSNicholas Bellinger if ((hdr->itt == 0xFFFFFFFF) && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1434e48354ceSNicholas Bellinger pr_err("NOPOUT ITT is reserved, but Immediate Bit is" 1435e48354ceSNicholas Bellinger " not set, protocol error.\n"); 1436e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1437e48354ceSNicholas Bellinger buf, conn); 1438e48354ceSNicholas Bellinger } 1439e48354ceSNicholas Bellinger 1440e48354ceSNicholas Bellinger if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { 1441e48354ceSNicholas Bellinger pr_err("NOPOUT Ping Data DataSegmentLength: %u is" 1442e48354ceSNicholas Bellinger " greater than MaxRecvDataSegmentLength: %u, protocol" 1443e48354ceSNicholas Bellinger " error.\n", payload_length, 1444e48354ceSNicholas Bellinger conn->conn_ops->MaxRecvDataSegmentLength); 1445e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1446e48354ceSNicholas Bellinger buf, conn); 1447e48354ceSNicholas Bellinger } 1448e48354ceSNicholas Bellinger 1449e48354ceSNicholas Bellinger pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x," 1450e48354ceSNicholas Bellinger " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", 1451e48354ceSNicholas Bellinger (hdr->itt == 0xFFFFFFFF) ? "Response" : "Request", 1452e48354ceSNicholas Bellinger hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, 1453e48354ceSNicholas Bellinger payload_length); 1454e48354ceSNicholas Bellinger /* 1455e48354ceSNicholas Bellinger * This is not a response to a Unsolicited NopIN, which means 1456e48354ceSNicholas Bellinger * it can either be a NOPOUT ping request (with a valid ITT), 1457e48354ceSNicholas Bellinger * or a NOPOUT not requesting a NOPIN (with a reserved ITT). 1458e48354ceSNicholas Bellinger * Either way, make sure we allocate an struct iscsi_cmd, as both 1459e48354ceSNicholas Bellinger * can contain ping data. 1460e48354ceSNicholas Bellinger */ 1461e48354ceSNicholas Bellinger if (hdr->ttt == 0xFFFFFFFF) { 1462e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1463e48354ceSNicholas Bellinger if (!cmd) 1464e48354ceSNicholas Bellinger return iscsit_add_reject( 1465e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1466e48354ceSNicholas Bellinger 1, buf, conn); 1467e48354ceSNicholas Bellinger 1468e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; 1469e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_NOPIN; 1470e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1471e48354ceSNicholas Bellinger 1 : 0); 1472e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 1473e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 1474e48354ceSNicholas Bellinger cmd->cmd_sn = hdr->cmdsn; 1475e48354ceSNicholas Bellinger cmd->exp_stat_sn = hdr->exp_statsn; 1476e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 1477e48354ceSNicholas Bellinger } 1478e48354ceSNicholas Bellinger 1479e48354ceSNicholas Bellinger if (payload_length && (hdr->ttt == 0xFFFFFFFF)) { 1480e48354ceSNicholas Bellinger rx_size = payload_length; 1481e48354ceSNicholas Bellinger ping_data = kzalloc(payload_length + 1, GFP_KERNEL); 1482e48354ceSNicholas Bellinger if (!ping_data) { 1483e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 1484e48354ceSNicholas Bellinger " NOPOUT ping data.\n"); 1485e48354ceSNicholas Bellinger ret = -1; 1486e48354ceSNicholas Bellinger goto out; 1487e48354ceSNicholas Bellinger } 1488e48354ceSNicholas Bellinger 1489e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1490e48354ceSNicholas Bellinger iov[niov].iov_base = ping_data; 1491e48354ceSNicholas Bellinger iov[niov++].iov_len = payload_length; 1492e48354ceSNicholas Bellinger 1493e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1494e48354ceSNicholas Bellinger if (padding != 0) { 1495e48354ceSNicholas Bellinger pr_debug("Receiving %u additional bytes" 1496e48354ceSNicholas Bellinger " for padding.\n", padding); 1497e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->pad_bytes; 1498e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 1499e48354ceSNicholas Bellinger rx_size += padding; 1500e48354ceSNicholas Bellinger } 1501e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1502e48354ceSNicholas Bellinger iov[niov].iov_base = &checksum; 1503e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 1504e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1505e48354ceSNicholas Bellinger } 1506e48354ceSNicholas Bellinger 1507e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); 1508e48354ceSNicholas Bellinger if (rx_got != rx_size) { 1509e48354ceSNicholas Bellinger ret = -1; 1510e48354ceSNicholas Bellinger goto out; 1511e48354ceSNicholas Bellinger } 1512e48354ceSNicholas Bellinger 1513e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1514e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 1515e48354ceSNicholas Bellinger ping_data, payload_length, 1516e48354ceSNicholas Bellinger padding, cmd->pad_bytes, 1517e48354ceSNicholas Bellinger (u8 *)&data_crc); 1518e48354ceSNicholas Bellinger 1519e48354ceSNicholas Bellinger if (checksum != data_crc) { 1520e48354ceSNicholas Bellinger pr_err("Ping data CRC32C DataDigest" 1521e48354ceSNicholas Bellinger " 0x%08x does not match computed 0x%08x\n", 1522e48354ceSNicholas Bellinger checksum, data_crc); 1523e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 1524e48354ceSNicholas Bellinger pr_err("Unable to recover from" 1525e48354ceSNicholas Bellinger " NOPOUT Ping DataCRC failure while in" 1526e48354ceSNicholas Bellinger " ERL=0.\n"); 1527e48354ceSNicholas Bellinger ret = -1; 1528e48354ceSNicholas Bellinger goto out; 1529e48354ceSNicholas Bellinger } else { 1530e48354ceSNicholas Bellinger /* 1531e48354ceSNicholas Bellinger * Silently drop this PDU and let the 1532e48354ceSNicholas Bellinger * initiator plug the CmdSN gap. 1533e48354ceSNicholas Bellinger */ 1534e48354ceSNicholas Bellinger pr_debug("Dropping NOPOUT" 1535e48354ceSNicholas Bellinger " Command CmdSN: 0x%08x due to" 1536e48354ceSNicholas Bellinger " DataCRC error.\n", hdr->cmdsn); 1537e48354ceSNicholas Bellinger ret = 0; 1538e48354ceSNicholas Bellinger goto out; 1539e48354ceSNicholas Bellinger } 1540e48354ceSNicholas Bellinger } else { 1541e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest" 1542e48354ceSNicholas Bellinger " 0x%08x for %u bytes of ping data.\n", 1543e48354ceSNicholas Bellinger checksum, payload_length); 1544e48354ceSNicholas Bellinger } 1545e48354ceSNicholas Bellinger } 1546e48354ceSNicholas Bellinger 1547e48354ceSNicholas Bellinger ping_data[payload_length] = '\0'; 1548e48354ceSNicholas Bellinger /* 1549e48354ceSNicholas Bellinger * Attach ping data to struct iscsi_cmd->buf_ptr. 1550e48354ceSNicholas Bellinger */ 15518359cf43SJörn Engel cmd->buf_ptr = ping_data; 1552e48354ceSNicholas Bellinger cmd->buf_ptr_size = payload_length; 1553e48354ceSNicholas Bellinger 1554e48354ceSNicholas Bellinger pr_debug("Got %u bytes of NOPOUT ping" 1555e48354ceSNicholas Bellinger " data.\n", payload_length); 1556e48354ceSNicholas Bellinger pr_debug("Ping Data: \"%s\"\n", ping_data); 1557e48354ceSNicholas Bellinger } 1558e48354ceSNicholas Bellinger 1559e48354ceSNicholas Bellinger if (hdr->itt != 0xFFFFFFFF) { 1560e48354ceSNicholas Bellinger if (!cmd) { 1561e48354ceSNicholas Bellinger pr_err("Checking CmdSN for NOPOUT," 1562e48354ceSNicholas Bellinger " but cmd is NULL!\n"); 1563e48354ceSNicholas Bellinger return -1; 1564e48354ceSNicholas Bellinger } 1565e48354ceSNicholas Bellinger /* 1566e48354ceSNicholas Bellinger * Initiator is expecting a NopIN ping reply, 1567e48354ceSNicholas Bellinger */ 1568e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 15692fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1570e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1571e48354ceSNicholas Bellinger 1572e48354ceSNicholas Bellinger iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); 1573e48354ceSNicholas Bellinger 1574e48354ceSNicholas Bellinger if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 1575e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, 1576e48354ceSNicholas Bellinger cmd->i_state); 1577e48354ceSNicholas Bellinger return 0; 1578e48354ceSNicholas Bellinger } 1579e48354ceSNicholas Bellinger 1580e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1581e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { 1582e48354ceSNicholas Bellinger ret = 0; 1583e48354ceSNicholas Bellinger goto ping_out; 1584e48354ceSNicholas Bellinger } 1585e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1586e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1587e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1588e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1589e48354ceSNicholas Bellinger 1590e48354ceSNicholas Bellinger return 0; 1591e48354ceSNicholas Bellinger } 1592e48354ceSNicholas Bellinger 1593e48354ceSNicholas Bellinger if (hdr->ttt != 0xFFFFFFFF) { 1594e48354ceSNicholas Bellinger /* 1595e48354ceSNicholas Bellinger * This was a response to a unsolicited NOPIN ping. 1596e48354ceSNicholas Bellinger */ 1597e48354ceSNicholas Bellinger cmd = iscsit_find_cmd_from_ttt(conn, hdr->ttt); 1598e48354ceSNicholas Bellinger if (!cmd) 1599e48354ceSNicholas Bellinger return -1; 1600e48354ceSNicholas Bellinger 1601e48354ceSNicholas Bellinger iscsit_stop_nopin_response_timer(conn); 1602e48354ceSNicholas Bellinger 1603e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 1604e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 1605e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 1606e48354ceSNicholas Bellinger } else { 1607e48354ceSNicholas Bellinger /* 1608e48354ceSNicholas Bellinger * Initiator is not expecting a NOPIN is response. 1609e48354ceSNicholas Bellinger * Just ignore for now. 1610e48354ceSNicholas Bellinger * 1611e48354ceSNicholas Bellinger * iSCSI v19-91 10.18 1612e48354ceSNicholas Bellinger * "A NOP-OUT may also be used to confirm a changed 1613e48354ceSNicholas Bellinger * ExpStatSN if another PDU will not be available 1614e48354ceSNicholas Bellinger * for a long time." 1615e48354ceSNicholas Bellinger */ 1616e48354ceSNicholas Bellinger ret = 0; 1617e48354ceSNicholas Bellinger goto out; 1618e48354ceSNicholas Bellinger } 1619e48354ceSNicholas Bellinger 1620e48354ceSNicholas Bellinger return 0; 1621e48354ceSNicholas Bellinger out: 1622e48354ceSNicholas Bellinger if (cmd) 1623e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 1624e48354ceSNicholas Bellinger ping_out: 1625e48354ceSNicholas Bellinger kfree(ping_data); 1626e48354ceSNicholas Bellinger return ret; 1627e48354ceSNicholas Bellinger } 1628e48354ceSNicholas Bellinger 1629e48354ceSNicholas Bellinger static int iscsit_handle_task_mgt_cmd( 1630e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1631e48354ceSNicholas Bellinger unsigned char *buf) 1632e48354ceSNicholas Bellinger { 1633e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 1634e48354ceSNicholas Bellinger struct se_tmr_req *se_tmr; 1635e48354ceSNicholas Bellinger struct iscsi_tmr_req *tmr_req; 1636e48354ceSNicholas Bellinger struct iscsi_tm *hdr; 1637e48354ceSNicholas Bellinger int out_of_order_cmdsn = 0; 1638e48354ceSNicholas Bellinger int ret; 1639e48354ceSNicholas Bellinger u8 function; 1640e48354ceSNicholas Bellinger 1641e48354ceSNicholas Bellinger hdr = (struct iscsi_tm *) buf; 1642e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 1643e48354ceSNicholas Bellinger hdr->rtt = be32_to_cpu(hdr->rtt); 1644e48354ceSNicholas Bellinger hdr->cmdsn = be32_to_cpu(hdr->cmdsn); 1645e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 1646e48354ceSNicholas Bellinger hdr->refcmdsn = be32_to_cpu(hdr->refcmdsn); 1647e48354ceSNicholas Bellinger hdr->exp_datasn = be32_to_cpu(hdr->exp_datasn); 1648e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; 1649e48354ceSNicholas Bellinger function = hdr->flags; 1650e48354ceSNicholas Bellinger 1651e48354ceSNicholas Bellinger pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" 1652e48354ceSNicholas Bellinger " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" 1653e48354ceSNicholas Bellinger " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, 1654e48354ceSNicholas Bellinger hdr->rtt, hdr->refcmdsn, conn->cid); 1655e48354ceSNicholas Bellinger 1656e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_ABORT_TASK) && 1657e48354ceSNicholas Bellinger ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && 1658e48354ceSNicholas Bellinger (hdr->rtt != ISCSI_RESERVED_TAG))) { 1659e48354ceSNicholas Bellinger pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); 1660e48354ceSNicholas Bellinger hdr->rtt = ISCSI_RESERVED_TAG; 1661e48354ceSNicholas Bellinger } 1662e48354ceSNicholas Bellinger 1663e48354ceSNicholas Bellinger if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && 1664e48354ceSNicholas Bellinger !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1665e48354ceSNicholas Bellinger pr_err("Task Management Request TASK_REASSIGN not" 1666e48354ceSNicholas Bellinger " issued as immediate command, bad iSCSI Initiator" 1667e48354ceSNicholas Bellinger "implementation\n"); 1668e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1669e48354ceSNicholas Bellinger buf, conn); 1670e48354ceSNicholas Bellinger } 1671e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_ABORT_TASK) && 1672e48354ceSNicholas Bellinger (hdr->refcmdsn != ISCSI_RESERVED_TAG)) 1673e48354ceSNicholas Bellinger hdr->refcmdsn = ISCSI_RESERVED_TAG; 1674e48354ceSNicholas Bellinger 1675d28b1169SAndy Grover cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1676e48354ceSNicholas Bellinger if (!cmd) 1677e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1678e48354ceSNicholas Bellinger 1, buf, conn); 1679e48354ceSNicholas Bellinger 1680d28b1169SAndy Grover cmd->data_direction = DMA_NONE; 1681d28b1169SAndy Grover 1682d28b1169SAndy Grover cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); 1683d28b1169SAndy Grover if (!cmd->tmr_req) { 1684d28b1169SAndy Grover pr_err("Unable to allocate memory for" 1685d28b1169SAndy Grover " Task Management command!\n"); 1686d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1687d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1688d28b1169SAndy Grover 1, 1, buf, cmd); 1689d28b1169SAndy Grover } 1690d28b1169SAndy Grover 1691d28b1169SAndy Grover /* 1692d28b1169SAndy Grover * TASK_REASSIGN for ERL=2 / connection stays inside of 1693d28b1169SAndy Grover * LIO-Target $FABRIC_MOD 1694d28b1169SAndy Grover */ 1695d28b1169SAndy Grover if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { 1696d28b1169SAndy Grover 1697d28b1169SAndy Grover u8 tcm_function; 1698d28b1169SAndy Grover int ret; 1699d28b1169SAndy Grover 1700d28b1169SAndy Grover transport_init_se_cmd(&cmd->se_cmd, 1701d28b1169SAndy Grover &lio_target_fabric_configfs->tf_ops, 1702d28b1169SAndy Grover conn->sess->se_sess, 0, DMA_NONE, 17039c58b7ddSRoland Dreier MSG_SIMPLE_TAG, cmd->sense_buffer + 2); 1704d28b1169SAndy Grover 1705d28b1169SAndy Grover switch (function) { 1706d28b1169SAndy Grover case ISCSI_TM_FUNC_ABORT_TASK: 1707d28b1169SAndy Grover tcm_function = TMR_ABORT_TASK; 1708d28b1169SAndy Grover break; 1709d28b1169SAndy Grover case ISCSI_TM_FUNC_ABORT_TASK_SET: 1710d28b1169SAndy Grover tcm_function = TMR_ABORT_TASK_SET; 1711d28b1169SAndy Grover break; 1712d28b1169SAndy Grover case ISCSI_TM_FUNC_CLEAR_ACA: 1713d28b1169SAndy Grover tcm_function = TMR_CLEAR_ACA; 1714d28b1169SAndy Grover break; 1715d28b1169SAndy Grover case ISCSI_TM_FUNC_CLEAR_TASK_SET: 1716d28b1169SAndy Grover tcm_function = TMR_CLEAR_TASK_SET; 1717d28b1169SAndy Grover break; 1718d28b1169SAndy Grover case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 1719d28b1169SAndy Grover tcm_function = TMR_LUN_RESET; 1720d28b1169SAndy Grover break; 1721d28b1169SAndy Grover case ISCSI_TM_FUNC_TARGET_WARM_RESET: 1722d28b1169SAndy Grover tcm_function = TMR_TARGET_WARM_RESET; 1723d28b1169SAndy Grover break; 1724d28b1169SAndy Grover case ISCSI_TM_FUNC_TARGET_COLD_RESET: 1725d28b1169SAndy Grover tcm_function = TMR_TARGET_COLD_RESET; 1726d28b1169SAndy Grover break; 1727d28b1169SAndy Grover default: 1728d28b1169SAndy Grover pr_err("Unknown iSCSI TMR Function:" 1729d28b1169SAndy Grover " 0x%02x\n", function); 1730d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1731d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1732d28b1169SAndy Grover 1, 1, buf, cmd); 1733d28b1169SAndy Grover } 1734d28b1169SAndy Grover 1735d28b1169SAndy Grover ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, 1736d28b1169SAndy Grover tcm_function, GFP_KERNEL); 1737d28b1169SAndy Grover if (ret < 0) 1738d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1739d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1740d28b1169SAndy Grover 1, 1, buf, cmd); 1741d28b1169SAndy Grover 1742d28b1169SAndy Grover cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; 1743d28b1169SAndy Grover } 1744d28b1169SAndy Grover 1745e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; 1746e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_TASKMGTRSP; 1747e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 1748e48354ceSNicholas Bellinger cmd->init_task_tag = hdr->itt; 1749e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 1750e48354ceSNicholas Bellinger cmd->cmd_sn = hdr->cmdsn; 1751e48354ceSNicholas Bellinger cmd->exp_stat_sn = hdr->exp_statsn; 1752e48354ceSNicholas Bellinger se_tmr = cmd->se_cmd.se_tmr_req; 1753e48354ceSNicholas Bellinger tmr_req = cmd->tmr_req; 1754e48354ceSNicholas Bellinger /* 1755e48354ceSNicholas Bellinger * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN 1756e48354ceSNicholas Bellinger */ 1757e48354ceSNicholas Bellinger if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { 17584f26998aSAndy Grover ret = transport_lookup_tmr_lun(&cmd->se_cmd, 17594f26998aSAndy Grover scsilun_to_int(&hdr->lun)); 1760e48354ceSNicholas Bellinger if (ret < 0) { 1761e48354ceSNicholas Bellinger cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1762e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_NO_LUN; 1763e48354ceSNicholas Bellinger goto attach; 1764e48354ceSNicholas Bellinger } 1765e48354ceSNicholas Bellinger } 1766e48354ceSNicholas Bellinger 1767e48354ceSNicholas Bellinger switch (function) { 1768e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK: 1769e48354ceSNicholas Bellinger se_tmr->response = iscsit_tmr_abort_task(cmd, buf); 1770e48354ceSNicholas Bellinger if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) { 1771e48354ceSNicholas Bellinger cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1772e48354ceSNicholas Bellinger goto attach; 1773e48354ceSNicholas Bellinger } 1774e48354ceSNicholas Bellinger break; 1775e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK_SET: 1776e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_ACA: 1777e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_TASK_SET: 1778e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 1779e48354ceSNicholas Bellinger break; 1780e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_WARM_RESET: 1781e48354ceSNicholas Bellinger if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { 1782e48354ceSNicholas Bellinger cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1783e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; 1784e48354ceSNicholas Bellinger goto attach; 1785e48354ceSNicholas Bellinger } 1786e48354ceSNicholas Bellinger break; 1787e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_COLD_RESET: 1788e48354ceSNicholas Bellinger if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { 1789e48354ceSNicholas Bellinger cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1790e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; 1791e48354ceSNicholas Bellinger goto attach; 1792e48354ceSNicholas Bellinger } 1793e48354ceSNicholas Bellinger break; 1794e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TASK_REASSIGN: 1795e48354ceSNicholas Bellinger se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); 1796e48354ceSNicholas Bellinger /* 1797e48354ceSNicholas Bellinger * Perform sanity checks on the ExpDataSN only if the 1798e48354ceSNicholas Bellinger * TASK_REASSIGN was successful. 1799e48354ceSNicholas Bellinger */ 1800e48354ceSNicholas Bellinger if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) 1801e48354ceSNicholas Bellinger break; 1802e48354ceSNicholas Bellinger 1803e48354ceSNicholas Bellinger if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) 1804e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1805e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_INVALID, 1, 1, 1806e48354ceSNicholas Bellinger buf, cmd); 1807e48354ceSNicholas Bellinger break; 1808e48354ceSNicholas Bellinger default: 1809e48354ceSNicholas Bellinger pr_err("Unknown TMR function: 0x%02x, protocol" 1810e48354ceSNicholas Bellinger " error.\n", function); 1811e48354ceSNicholas Bellinger cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; 1812e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; 1813e48354ceSNicholas Bellinger goto attach; 1814e48354ceSNicholas Bellinger } 1815e48354ceSNicholas Bellinger 1816e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && 1817e48354ceSNicholas Bellinger (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) 1818e48354ceSNicholas Bellinger se_tmr->call_transport = 1; 1819e48354ceSNicholas Bellinger attach: 1820e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 18212fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1822e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1823e48354ceSNicholas Bellinger 1824e48354ceSNicholas Bellinger if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1825e48354ceSNicholas Bellinger int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1826e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) 1827e48354ceSNicholas Bellinger out_of_order_cmdsn = 1; 18285a4c8666SNicholas Bellinger else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) 1829e48354ceSNicholas Bellinger return 0; 18305a4c8666SNicholas Bellinger else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1831e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1832e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1833e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1834e48354ceSNicholas Bellinger } 1835e48354ceSNicholas Bellinger iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); 1836e48354ceSNicholas Bellinger 18375a4c8666SNicholas Bellinger if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) 1838e48354ceSNicholas Bellinger return 0; 1839e48354ceSNicholas Bellinger /* 1840e48354ceSNicholas Bellinger * Found the referenced task, send to transport for processing. 1841e48354ceSNicholas Bellinger */ 1842e48354ceSNicholas Bellinger if (se_tmr->call_transport) 1843e48354ceSNicholas Bellinger return transport_generic_handle_tmr(&cmd->se_cmd); 1844e48354ceSNicholas Bellinger 1845e48354ceSNicholas Bellinger /* 1846e48354ceSNicholas Bellinger * Could not find the referenced LUN, task, or Task Management 1847e48354ceSNicholas Bellinger * command not authorized or supported. Change state and 1848e48354ceSNicholas Bellinger * let the tx_thread send the response. 1849e48354ceSNicholas Bellinger * 1850e48354ceSNicholas Bellinger * For connection recovery, this is also the default action for 1851e48354ceSNicholas Bellinger * TMR TASK_REASSIGN. 1852e48354ceSNicholas Bellinger */ 1853e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 1854e48354ceSNicholas Bellinger return 0; 1855e48354ceSNicholas Bellinger } 1856e48354ceSNicholas Bellinger 1857e48354ceSNicholas Bellinger /* #warning FIXME: Support Text Command parameters besides SendTargets */ 1858e48354ceSNicholas Bellinger static int iscsit_handle_text_cmd( 1859e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1860e48354ceSNicholas Bellinger unsigned char *buf) 1861e48354ceSNicholas Bellinger { 1862e48354ceSNicholas Bellinger char *text_ptr, *text_in; 1863e48354ceSNicholas Bellinger int cmdsn_ret, niov = 0, rx_got, rx_size; 1864e48354ceSNicholas Bellinger u32 checksum = 0, data_crc = 0, payload_length; 186576f1928eSNicholas Bellinger u32 padding = 0, pad_bytes = 0, text_length = 0; 1866e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 1867e48354ceSNicholas Bellinger struct kvec iov[3]; 1868e48354ceSNicholas Bellinger struct iscsi_text *hdr; 1869e48354ceSNicholas Bellinger 1870e48354ceSNicholas Bellinger hdr = (struct iscsi_text *) buf; 1871e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1872e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 1873e48354ceSNicholas Bellinger hdr->ttt = be32_to_cpu(hdr->ttt); 1874e48354ceSNicholas Bellinger hdr->cmdsn = be32_to_cpu(hdr->cmdsn); 1875e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 1876e48354ceSNicholas Bellinger 1877e48354ceSNicholas Bellinger if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { 1878e48354ceSNicholas Bellinger pr_err("Unable to accept text parameter length: %u" 1879e48354ceSNicholas Bellinger "greater than MaxRecvDataSegmentLength %u.\n", 1880e48354ceSNicholas Bellinger payload_length, conn->conn_ops->MaxRecvDataSegmentLength); 1881e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1882e48354ceSNicholas Bellinger buf, conn); 1883e48354ceSNicholas Bellinger } 1884e48354ceSNicholas Bellinger 1885e48354ceSNicholas Bellinger pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," 1886e48354ceSNicholas Bellinger " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, 1887e48354ceSNicholas Bellinger hdr->exp_statsn, payload_length); 1888e48354ceSNicholas Bellinger 1889e48354ceSNicholas Bellinger rx_size = text_length = payload_length; 1890e48354ceSNicholas Bellinger if (text_length) { 1891e48354ceSNicholas Bellinger text_in = kzalloc(text_length, GFP_KERNEL); 1892e48354ceSNicholas Bellinger if (!text_in) { 1893e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 1894e48354ceSNicholas Bellinger " incoming text parameters\n"); 1895e48354ceSNicholas Bellinger return -1; 1896e48354ceSNicholas Bellinger } 1897e48354ceSNicholas Bellinger 1898e48354ceSNicholas Bellinger memset(iov, 0, 3 * sizeof(struct kvec)); 1899e48354ceSNicholas Bellinger iov[niov].iov_base = text_in; 1900e48354ceSNicholas Bellinger iov[niov++].iov_len = text_length; 1901e48354ceSNicholas Bellinger 1902e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1903e48354ceSNicholas Bellinger if (padding != 0) { 190476f1928eSNicholas Bellinger iov[niov].iov_base = &pad_bytes; 1905e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 1906e48354ceSNicholas Bellinger rx_size += padding; 1907e48354ceSNicholas Bellinger pr_debug("Receiving %u additional bytes" 1908e48354ceSNicholas Bellinger " for padding.\n", padding); 1909e48354ceSNicholas Bellinger } 1910e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1911e48354ceSNicholas Bellinger iov[niov].iov_base = &checksum; 1912e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 1913e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1914e48354ceSNicholas Bellinger } 1915e48354ceSNicholas Bellinger 1916e48354ceSNicholas Bellinger rx_got = rx_data(conn, &iov[0], niov, rx_size); 1917e48354ceSNicholas Bellinger if (rx_got != rx_size) { 1918e48354ceSNicholas Bellinger kfree(text_in); 1919e48354ceSNicholas Bellinger return -1; 1920e48354ceSNicholas Bellinger } 1921e48354ceSNicholas Bellinger 1922e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1923e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 1924e48354ceSNicholas Bellinger text_in, text_length, 192576f1928eSNicholas Bellinger padding, (u8 *)&pad_bytes, 1926e48354ceSNicholas Bellinger (u8 *)&data_crc); 1927e48354ceSNicholas Bellinger 1928e48354ceSNicholas Bellinger if (checksum != data_crc) { 1929e48354ceSNicholas Bellinger pr_err("Text data CRC32C DataDigest" 1930e48354ceSNicholas Bellinger " 0x%08x does not match computed" 1931e48354ceSNicholas Bellinger " 0x%08x\n", checksum, data_crc); 1932e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 1933e48354ceSNicholas Bellinger pr_err("Unable to recover from" 1934e48354ceSNicholas Bellinger " Text Data digest failure while in" 1935e48354ceSNicholas Bellinger " ERL=0.\n"); 1936e48354ceSNicholas Bellinger kfree(text_in); 1937e48354ceSNicholas Bellinger return -1; 1938e48354ceSNicholas Bellinger } else { 1939e48354ceSNicholas Bellinger /* 1940e48354ceSNicholas Bellinger * Silently drop this PDU and let the 1941e48354ceSNicholas Bellinger * initiator plug the CmdSN gap. 1942e48354ceSNicholas Bellinger */ 1943e48354ceSNicholas Bellinger pr_debug("Dropping Text" 1944e48354ceSNicholas Bellinger " Command CmdSN: 0x%08x due to" 1945e48354ceSNicholas Bellinger " DataCRC error.\n", hdr->cmdsn); 1946e48354ceSNicholas Bellinger kfree(text_in); 1947e48354ceSNicholas Bellinger return 0; 1948e48354ceSNicholas Bellinger } 1949e48354ceSNicholas Bellinger } else { 1950e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest" 1951e48354ceSNicholas Bellinger " 0x%08x for %u bytes of text data.\n", 1952e48354ceSNicholas Bellinger checksum, text_length); 1953e48354ceSNicholas Bellinger } 1954e48354ceSNicholas Bellinger } 1955e48354ceSNicholas Bellinger text_in[text_length - 1] = '\0'; 1956e48354ceSNicholas Bellinger pr_debug("Successfully read %d bytes of text" 1957e48354ceSNicholas Bellinger " data.\n", text_length); 1958e48354ceSNicholas Bellinger 1959e48354ceSNicholas Bellinger if (strncmp("SendTargets", text_in, 11) != 0) { 1960e48354ceSNicholas Bellinger pr_err("Received Text Data that is not" 1961e48354ceSNicholas Bellinger " SendTargets, cannot continue.\n"); 1962e48354ceSNicholas Bellinger kfree(text_in); 1963e48354ceSNicholas Bellinger return -1; 1964e48354ceSNicholas Bellinger } 1965e48354ceSNicholas Bellinger text_ptr = strchr(text_in, '='); 1966e48354ceSNicholas Bellinger if (!text_ptr) { 1967e48354ceSNicholas Bellinger pr_err("No \"=\" separator found in Text Data," 1968e48354ceSNicholas Bellinger " cannot continue.\n"); 1969e48354ceSNicholas Bellinger kfree(text_in); 1970e48354ceSNicholas Bellinger return -1; 1971e48354ceSNicholas Bellinger } 1972e48354ceSNicholas Bellinger if (strncmp("=All", text_ptr, 4) != 0) { 1973e48354ceSNicholas Bellinger pr_err("Unable to locate All value for" 1974e48354ceSNicholas Bellinger " SendTargets key, cannot continue.\n"); 1975e48354ceSNicholas Bellinger kfree(text_in); 1976e48354ceSNicholas Bellinger return -1; 1977e48354ceSNicholas Bellinger } 1978e48354ceSNicholas Bellinger /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ 1979e48354ceSNicholas Bellinger kfree(text_in); 1980e48354ceSNicholas Bellinger } 1981e48354ceSNicholas Bellinger 1982e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1983e48354ceSNicholas Bellinger if (!cmd) 1984e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1985e48354ceSNicholas Bellinger 1, buf, conn); 1986e48354ceSNicholas Bellinger 1987e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_TEXT; 1988e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_TEXTRSP; 1989e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 1990e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 1991e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 1992e48354ceSNicholas Bellinger cmd->cmd_sn = hdr->cmdsn; 1993e48354ceSNicholas Bellinger cmd->exp_stat_sn = hdr->exp_statsn; 1994e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 1995e48354ceSNicholas Bellinger 1996e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 19972fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1998e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1999e48354ceSNicholas Bellinger 2000e48354ceSNicholas Bellinger iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); 2001e48354ceSNicholas Bellinger 2002e48354ceSNicholas Bellinger if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 2003e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 2004e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 2005e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 2006e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 2007e48354ceSNicholas Bellinger 1, 0, buf, cmd); 2008e48354ceSNicholas Bellinger 2009e48354ceSNicholas Bellinger return 0; 2010e48354ceSNicholas Bellinger } 2011e48354ceSNicholas Bellinger 2012e48354ceSNicholas Bellinger return iscsit_execute_cmd(cmd, 0); 2013e48354ceSNicholas Bellinger } 2014e48354ceSNicholas Bellinger 2015e48354ceSNicholas Bellinger int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2016e48354ceSNicholas Bellinger { 2017e48354ceSNicholas Bellinger struct iscsi_conn *conn_p; 2018e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2019e48354ceSNicholas Bellinger 2020e48354ceSNicholas Bellinger pr_debug("Received logout request CLOSESESSION on CID: %hu" 2021e48354ceSNicholas Bellinger " for SID: %u.\n", conn->cid, conn->sess->sid); 2022e48354ceSNicholas Bellinger 2023e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 1); 2024e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 1); 2025e48354ceSNicholas Bellinger conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; 2026e48354ceSNicholas Bellinger 2027e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 2028e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess); 2029e48354ceSNicholas Bellinger 2030e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 2031e48354ceSNicholas Bellinger list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { 2032e48354ceSNicholas Bellinger if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) 2033e48354ceSNicholas Bellinger continue; 2034e48354ceSNicholas Bellinger 2035e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 2036e48354ceSNicholas Bellinger conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; 2037e48354ceSNicholas Bellinger } 2038e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 2039e48354ceSNicholas Bellinger 2040e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2041e48354ceSNicholas Bellinger 2042e48354ceSNicholas Bellinger return 0; 2043e48354ceSNicholas Bellinger } 2044e48354ceSNicholas Bellinger 2045e48354ceSNicholas Bellinger int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2046e48354ceSNicholas Bellinger { 2047e48354ceSNicholas Bellinger struct iscsi_conn *l_conn; 2048e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2049e48354ceSNicholas Bellinger 2050e48354ceSNicholas Bellinger pr_debug("Received logout request CLOSECONNECTION for CID:" 2051e48354ceSNicholas Bellinger " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); 2052e48354ceSNicholas Bellinger 2053e48354ceSNicholas Bellinger /* 2054e48354ceSNicholas Bellinger * A Logout Request with a CLOSECONNECTION reason code for a CID 2055e48354ceSNicholas Bellinger * can arrive on a connection with a differing CID. 2056e48354ceSNicholas Bellinger */ 2057e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 2058e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 2059e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 2060e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; 2061e48354ceSNicholas Bellinger 2062e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 1); 2063e48354ceSNicholas Bellinger conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; 2064e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 2065e48354ceSNicholas Bellinger 2066e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 2067e48354ceSNicholas Bellinger } else { 2068e48354ceSNicholas Bellinger /* 2069e48354ceSNicholas Bellinger * Handle all different cid CLOSECONNECTION requests in 2070e48354ceSNicholas Bellinger * iscsit_logout_post_handler_diffcid() as to give enough 2071e48354ceSNicholas Bellinger * time for any non immediate command's CmdSN to be 2072e48354ceSNicholas Bellinger * acknowledged on the connection in question. 2073e48354ceSNicholas Bellinger * 2074e48354ceSNicholas Bellinger * Here we simply make sure the CID is still around. 2075e48354ceSNicholas Bellinger */ 2076e48354ceSNicholas Bellinger l_conn = iscsit_get_conn_from_cid(sess, 2077e48354ceSNicholas Bellinger cmd->logout_cid); 2078e48354ceSNicholas Bellinger if (!l_conn) { 2079e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; 2080e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, 2081e48354ceSNicholas Bellinger cmd->i_state); 2082e48354ceSNicholas Bellinger return 0; 2083e48354ceSNicholas Bellinger } 2084e48354ceSNicholas Bellinger 2085e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(l_conn); 2086e48354ceSNicholas Bellinger } 2087e48354ceSNicholas Bellinger 2088e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2089e48354ceSNicholas Bellinger 2090e48354ceSNicholas Bellinger return 0; 2091e48354ceSNicholas Bellinger } 2092e48354ceSNicholas Bellinger 2093e48354ceSNicholas Bellinger int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2094e48354ceSNicholas Bellinger { 2095e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2096e48354ceSNicholas Bellinger 2097e48354ceSNicholas Bellinger pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" 2098e48354ceSNicholas Bellinger " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); 2099e48354ceSNicholas Bellinger 2100e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel != 2) { 2101e48354ceSNicholas Bellinger pr_err("Received Logout Request REMOVECONNFORRECOVERY" 2102e48354ceSNicholas Bellinger " while ERL!=2.\n"); 2103e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; 2104e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2105e48354ceSNicholas Bellinger return 0; 2106e48354ceSNicholas Bellinger } 2107e48354ceSNicholas Bellinger 2108e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 2109e48354ceSNicholas Bellinger pr_err("Received Logout Request REMOVECONNFORRECOVERY" 2110e48354ceSNicholas Bellinger " with CID: %hu on CID: %hu, implementation error.\n", 2111e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2112e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; 2113e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2114e48354ceSNicholas Bellinger return 0; 2115e48354ceSNicholas Bellinger } 2116e48354ceSNicholas Bellinger 2117e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2118e48354ceSNicholas Bellinger 2119e48354ceSNicholas Bellinger return 0; 2120e48354ceSNicholas Bellinger } 2121e48354ceSNicholas Bellinger 2122e48354ceSNicholas Bellinger static int iscsit_handle_logout_cmd( 2123e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2124e48354ceSNicholas Bellinger unsigned char *buf) 2125e48354ceSNicholas Bellinger { 2126e48354ceSNicholas Bellinger int cmdsn_ret, logout_remove = 0; 2127e48354ceSNicholas Bellinger u8 reason_code = 0; 2128e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 2129e48354ceSNicholas Bellinger struct iscsi_logout *hdr; 2130e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); 2131e48354ceSNicholas Bellinger 2132e48354ceSNicholas Bellinger hdr = (struct iscsi_logout *) buf; 2133e48354ceSNicholas Bellinger reason_code = (hdr->flags & 0x7f); 2134e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 2135e48354ceSNicholas Bellinger hdr->cid = be16_to_cpu(hdr->cid); 2136e48354ceSNicholas Bellinger hdr->cmdsn = be32_to_cpu(hdr->cmdsn); 2137e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 2138e48354ceSNicholas Bellinger 2139e48354ceSNicholas Bellinger if (tiqn) { 2140e48354ceSNicholas Bellinger spin_lock(&tiqn->logout_stats.lock); 2141e48354ceSNicholas Bellinger if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) 2142e48354ceSNicholas Bellinger tiqn->logout_stats.normal_logouts++; 2143e48354ceSNicholas Bellinger else 2144e48354ceSNicholas Bellinger tiqn->logout_stats.abnormal_logouts++; 2145e48354ceSNicholas Bellinger spin_unlock(&tiqn->logout_stats.lock); 2146e48354ceSNicholas Bellinger } 2147e48354ceSNicholas Bellinger 2148e48354ceSNicholas Bellinger pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" 2149e48354ceSNicholas Bellinger " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", 2150e48354ceSNicholas Bellinger hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, 2151e48354ceSNicholas Bellinger hdr->cid, conn->cid); 2152e48354ceSNicholas Bellinger 2153e48354ceSNicholas Bellinger if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { 2154e48354ceSNicholas Bellinger pr_err("Received logout request on connection that" 2155e48354ceSNicholas Bellinger " is not in logged in state, ignoring request.\n"); 2156e48354ceSNicholas Bellinger return 0; 2157e48354ceSNicholas Bellinger } 2158e48354ceSNicholas Bellinger 2159e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 2160e48354ceSNicholas Bellinger if (!cmd) 2161e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, 2162e48354ceSNicholas Bellinger buf, conn); 2163e48354ceSNicholas Bellinger 2164e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_LOGOUT; 2165e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_LOGOUTRSP; 2166e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 2167e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 2168e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 2169e48354ceSNicholas Bellinger cmd->cmd_sn = hdr->cmdsn; 2170e48354ceSNicholas Bellinger cmd->exp_stat_sn = hdr->exp_statsn; 2171e48354ceSNicholas Bellinger cmd->logout_cid = hdr->cid; 2172e48354ceSNicholas Bellinger cmd->logout_reason = reason_code; 2173e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 2174e48354ceSNicholas Bellinger 2175e48354ceSNicholas Bellinger /* 2176e48354ceSNicholas Bellinger * We need to sleep in these cases (by returning 1) until the Logout 2177e48354ceSNicholas Bellinger * Response gets sent in the tx thread. 2178e48354ceSNicholas Bellinger */ 2179e48354ceSNicholas Bellinger if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || 2180e48354ceSNicholas Bellinger ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && 2181e48354ceSNicholas Bellinger (hdr->cid == conn->cid))) 2182e48354ceSNicholas Bellinger logout_remove = 1; 2183e48354ceSNicholas Bellinger 2184e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 21852fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 2186e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 2187e48354ceSNicholas Bellinger 2188e48354ceSNicholas Bellinger if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) 2189e48354ceSNicholas Bellinger iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); 2190e48354ceSNicholas Bellinger 2191e48354ceSNicholas Bellinger /* 2192e48354ceSNicholas Bellinger * Immediate commands are executed, well, immediately. 2193e48354ceSNicholas Bellinger * Non-Immediate Logout Commands are executed in CmdSN order. 2194e48354ceSNicholas Bellinger */ 2195c6037cc5SAndy Grover if (cmd->immediate_cmd) { 2196e48354ceSNicholas Bellinger int ret = iscsit_execute_cmd(cmd, 0); 2197e48354ceSNicholas Bellinger 2198e48354ceSNicholas Bellinger if (ret < 0) 2199e48354ceSNicholas Bellinger return ret; 2200e48354ceSNicholas Bellinger } else { 2201e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 2202e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { 2203e48354ceSNicholas Bellinger logout_remove = 0; 2204e48354ceSNicholas Bellinger } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { 2205e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 2206e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 2207e48354ceSNicholas Bellinger 1, 0, buf, cmd); 2208e48354ceSNicholas Bellinger } 2209e48354ceSNicholas Bellinger } 2210e48354ceSNicholas Bellinger 2211e48354ceSNicholas Bellinger return logout_remove; 2212e48354ceSNicholas Bellinger } 2213e48354ceSNicholas Bellinger 2214e48354ceSNicholas Bellinger static int iscsit_handle_snack( 2215e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2216e48354ceSNicholas Bellinger unsigned char *buf) 2217e48354ceSNicholas Bellinger { 2218e48354ceSNicholas Bellinger struct iscsi_snack *hdr; 2219e48354ceSNicholas Bellinger 2220e48354ceSNicholas Bellinger hdr = (struct iscsi_snack *) buf; 2221e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; 2222e48354ceSNicholas Bellinger hdr->itt = be32_to_cpu(hdr->itt); 2223e48354ceSNicholas Bellinger hdr->ttt = be32_to_cpu(hdr->ttt); 2224e48354ceSNicholas Bellinger hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); 2225e48354ceSNicholas Bellinger hdr->begrun = be32_to_cpu(hdr->begrun); 2226e48354ceSNicholas Bellinger hdr->runlength = be32_to_cpu(hdr->runlength); 2227e48354ceSNicholas Bellinger 2228e48354ceSNicholas Bellinger pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" 2229e48354ceSNicholas Bellinger " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," 2230e48354ceSNicholas Bellinger " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, 2231e48354ceSNicholas Bellinger hdr->begrun, hdr->runlength, conn->cid); 2232e48354ceSNicholas Bellinger 2233e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 2234e48354ceSNicholas Bellinger pr_err("Initiator sent SNACK request while in" 2235e48354ceSNicholas Bellinger " ErrorRecoveryLevel=0.\n"); 2236e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2237e48354ceSNicholas Bellinger buf, conn); 2238e48354ceSNicholas Bellinger } 2239e48354ceSNicholas Bellinger /* 2240e48354ceSNicholas Bellinger * SNACK_DATA and SNACK_R2T are both 0, so check which function to 2241e48354ceSNicholas Bellinger * call from inside iscsi_send_recovery_datain_or_r2t(). 2242e48354ceSNicholas Bellinger */ 2243e48354ceSNicholas Bellinger switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { 2244e48354ceSNicholas Bellinger case 0: 2245e48354ceSNicholas Bellinger return iscsit_handle_recovery_datain_or_r2t(conn, buf, 2246e48354ceSNicholas Bellinger hdr->itt, hdr->ttt, hdr->begrun, hdr->runlength); 2247e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_STATUS: 2248e48354ceSNicholas Bellinger return iscsit_handle_status_snack(conn, hdr->itt, hdr->ttt, 2249e48354ceSNicholas Bellinger hdr->begrun, hdr->runlength); 2250e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: 2251e48354ceSNicholas Bellinger return iscsit_handle_data_ack(conn, hdr->ttt, hdr->begrun, 2252e48354ceSNicholas Bellinger hdr->runlength); 2253e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_RDATA: 2254e48354ceSNicholas Bellinger /* FIXME: Support R-Data SNACK */ 2255e48354ceSNicholas Bellinger pr_err("R-Data SNACK Not Supported.\n"); 2256e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2257e48354ceSNicholas Bellinger buf, conn); 2258e48354ceSNicholas Bellinger default: 2259e48354ceSNicholas Bellinger pr_err("Unknown SNACK type 0x%02x, protocol" 2260e48354ceSNicholas Bellinger " error.\n", hdr->flags & 0x0f); 2261e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2262e48354ceSNicholas Bellinger buf, conn); 2263e48354ceSNicholas Bellinger } 2264e48354ceSNicholas Bellinger 2265e48354ceSNicholas Bellinger return 0; 2266e48354ceSNicholas Bellinger } 2267e48354ceSNicholas Bellinger 2268e48354ceSNicholas Bellinger static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) 2269e48354ceSNicholas Bellinger { 2270e48354ceSNicholas Bellinger if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || 2271e48354ceSNicholas Bellinger (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { 2272e48354ceSNicholas Bellinger wait_for_completion_interruptible_timeout( 2273e48354ceSNicholas Bellinger &conn->rx_half_close_comp, 2274e48354ceSNicholas Bellinger ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); 2275e48354ceSNicholas Bellinger } 2276e48354ceSNicholas Bellinger } 2277e48354ceSNicholas Bellinger 2278e48354ceSNicholas Bellinger static int iscsit_handle_immediate_data( 2279e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2280e48354ceSNicholas Bellinger unsigned char *buf, 2281e48354ceSNicholas Bellinger u32 length) 2282e48354ceSNicholas Bellinger { 2283e48354ceSNicholas Bellinger int iov_ret, rx_got = 0, rx_size = 0; 2284e48354ceSNicholas Bellinger u32 checksum, iov_count = 0, padding = 0; 2285e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 2286e48354ceSNicholas Bellinger struct kvec *iov; 2287e48354ceSNicholas Bellinger 2288e48354ceSNicholas Bellinger iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); 2289e48354ceSNicholas Bellinger if (iov_ret < 0) 2290e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2291e48354ceSNicholas Bellinger 2292e48354ceSNicholas Bellinger rx_size = length; 2293e48354ceSNicholas Bellinger iov_count = iov_ret; 2294e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 2295e48354ceSNicholas Bellinger 2296e48354ceSNicholas Bellinger padding = ((-length) & 3); 2297e48354ceSNicholas Bellinger if (padding != 0) { 2298e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 2299e48354ceSNicholas Bellinger iov[iov_count++].iov_len = padding; 2300e48354ceSNicholas Bellinger rx_size += padding; 2301e48354ceSNicholas Bellinger } 2302e48354ceSNicholas Bellinger 2303e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2304e48354ceSNicholas Bellinger iov[iov_count].iov_base = &checksum; 2305e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 2306e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 2307e48354ceSNicholas Bellinger } 2308e48354ceSNicholas Bellinger 2309e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); 2310e48354ceSNicholas Bellinger 2311e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 2312e48354ceSNicholas Bellinger 2313e48354ceSNicholas Bellinger if (rx_got != rx_size) { 2314e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 2315e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2316e48354ceSNicholas Bellinger } 2317e48354ceSNicholas Bellinger 2318e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2319e48354ceSNicholas Bellinger u32 data_crc; 2320e48354ceSNicholas Bellinger 2321e48354ceSNicholas Bellinger data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, 2322e48354ceSNicholas Bellinger cmd->write_data_done, length, padding, 2323e48354ceSNicholas Bellinger cmd->pad_bytes); 2324e48354ceSNicholas Bellinger 2325e48354ceSNicholas Bellinger if (checksum != data_crc) { 2326e48354ceSNicholas Bellinger pr_err("ImmediateData CRC32C DataDigest 0x%08x" 2327e48354ceSNicholas Bellinger " does not match computed 0x%08x\n", checksum, 2328e48354ceSNicholas Bellinger data_crc); 2329e48354ceSNicholas Bellinger 2330e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 2331e48354ceSNicholas Bellinger pr_err("Unable to recover from" 2332e48354ceSNicholas Bellinger " Immediate Data digest failure while" 2333e48354ceSNicholas Bellinger " in ERL=0.\n"); 2334e48354ceSNicholas Bellinger iscsit_add_reject_from_cmd( 2335e48354ceSNicholas Bellinger ISCSI_REASON_DATA_DIGEST_ERROR, 2336e48354ceSNicholas Bellinger 1, 0, buf, cmd); 2337e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2338e48354ceSNicholas Bellinger } else { 2339e48354ceSNicholas Bellinger iscsit_add_reject_from_cmd( 2340e48354ceSNicholas Bellinger ISCSI_REASON_DATA_DIGEST_ERROR, 2341e48354ceSNicholas Bellinger 0, 0, buf, cmd); 2342e48354ceSNicholas Bellinger return IMMEDIATE_DATA_ERL1_CRC_FAILURE; 2343e48354ceSNicholas Bellinger } 2344e48354ceSNicholas Bellinger } else { 2345e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest 0x%08x for" 2346e48354ceSNicholas Bellinger " %u bytes of Immediate Data\n", checksum, 2347e48354ceSNicholas Bellinger length); 2348e48354ceSNicholas Bellinger } 2349e48354ceSNicholas Bellinger } 2350e48354ceSNicholas Bellinger 2351e48354ceSNicholas Bellinger cmd->write_data_done += length; 2352e48354ceSNicholas Bellinger 2353ebf1d95cSAndy Grover if (cmd->write_data_done == cmd->se_cmd.data_length) { 2354e48354ceSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 2355e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 2356e48354ceSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 2357e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 2358e48354ceSNicholas Bellinger } 2359e48354ceSNicholas Bellinger 2360e48354ceSNicholas Bellinger return IMMEDIATE_DATA_NORMAL_OPERATION; 2361e48354ceSNicholas Bellinger } 2362e48354ceSNicholas Bellinger 2363e48354ceSNicholas Bellinger /* 2364e48354ceSNicholas Bellinger * Called with sess->conn_lock held. 2365e48354ceSNicholas Bellinger */ 2366e48354ceSNicholas Bellinger /* #warning iscsi_build_conn_drop_async_message() only sends out on connections 2367e48354ceSNicholas Bellinger with active network interface */ 2368e48354ceSNicholas Bellinger static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) 2369e48354ceSNicholas Bellinger { 2370e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 2371e48354ceSNicholas Bellinger struct iscsi_conn *conn_p; 2372e48354ceSNicholas Bellinger 2373e48354ceSNicholas Bellinger /* 2374e48354ceSNicholas Bellinger * Only send a Asynchronous Message on connections whos network 2375e48354ceSNicholas Bellinger * interface is still functional. 2376e48354ceSNicholas Bellinger */ 2377e48354ceSNicholas Bellinger list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { 2378e48354ceSNicholas Bellinger if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { 2379e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_p); 2380e48354ceSNicholas Bellinger break; 2381e48354ceSNicholas Bellinger } 2382e48354ceSNicholas Bellinger } 2383e48354ceSNicholas Bellinger 2384e48354ceSNicholas Bellinger if (!conn_p) 2385e48354ceSNicholas Bellinger return; 2386e48354ceSNicholas Bellinger 2387e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn_p, GFP_KERNEL); 2388e48354ceSNicholas Bellinger if (!cmd) { 2389e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_p); 2390e48354ceSNicholas Bellinger return; 2391e48354ceSNicholas Bellinger } 2392e48354ceSNicholas Bellinger 2393e48354ceSNicholas Bellinger cmd->logout_cid = conn->cid; 2394e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; 2395e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_ASYNCMSG; 2396e48354ceSNicholas Bellinger 2397e48354ceSNicholas Bellinger spin_lock_bh(&conn_p->cmd_lock); 23982fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); 2399e48354ceSNicholas Bellinger spin_unlock_bh(&conn_p->cmd_lock); 2400e48354ceSNicholas Bellinger 2401e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); 2402e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_p); 2403e48354ceSNicholas Bellinger } 2404e48354ceSNicholas Bellinger 2405e48354ceSNicholas Bellinger static int iscsit_send_conn_drop_async_message( 2406e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2407e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2408e48354ceSNicholas Bellinger { 2409e48354ceSNicholas Bellinger struct iscsi_async *hdr; 2410e48354ceSNicholas Bellinger 2411e48354ceSNicholas Bellinger cmd->tx_size = ISCSI_HDR_LEN; 2412e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; 2413e48354ceSNicholas Bellinger 2414e48354ceSNicholas Bellinger hdr = (struct iscsi_async *) cmd->pdu; 2415e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_ASYNC_EVENT; 2416e48354ceSNicholas Bellinger hdr->flags = ISCSI_FLAG_CMD_FINAL; 2417e48354ceSNicholas Bellinger cmd->init_task_tag = 0xFFFFFFFF; 2418e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 2419e48354ceSNicholas Bellinger put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); 2420e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2421e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2422e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2423e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2424e48354ceSNicholas Bellinger hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; 2425e48354ceSNicholas Bellinger hdr->param1 = cpu_to_be16(cmd->logout_cid); 2426e48354ceSNicholas Bellinger hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); 2427e48354ceSNicholas Bellinger hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); 2428e48354ceSNicholas Bellinger 2429e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2430e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2431e48354ceSNicholas Bellinger 2432e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2433e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2434e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2435e48354ceSNicholas Bellinger 2436e48354ceSNicholas Bellinger cmd->tx_size += ISCSI_CRC_LEN; 2437e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2438e48354ceSNicholas Bellinger " Async Message 0x%08x\n", *header_digest); 2439e48354ceSNicholas Bellinger } 2440e48354ceSNicholas Bellinger 2441e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2442e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = cmd->tx_size; 2443e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2444e48354ceSNicholas Bellinger 2445e48354ceSNicholas Bellinger pr_debug("Sending Connection Dropped Async Message StatSN:" 2446e48354ceSNicholas Bellinger " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, 2447e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2448e48354ceSNicholas Bellinger return 0; 2449e48354ceSNicholas Bellinger } 2450e48354ceSNicholas Bellinger 24516f3c0e69SAndy Grover static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) 24526f3c0e69SAndy Grover { 24536f3c0e69SAndy Grover if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || 24546f3c0e69SAndy Grover (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { 24556f3c0e69SAndy Grover wait_for_completion_interruptible_timeout( 24566f3c0e69SAndy Grover &conn->tx_half_close_comp, 24576f3c0e69SAndy Grover ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); 24586f3c0e69SAndy Grover } 24596f3c0e69SAndy Grover } 24606f3c0e69SAndy Grover 2461e48354ceSNicholas Bellinger static int iscsit_send_data_in( 2462e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 24636f3c0e69SAndy Grover struct iscsi_conn *conn) 2464e48354ceSNicholas Bellinger { 2465e48354ceSNicholas Bellinger int iov_ret = 0, set_statsn = 0; 2466e48354ceSNicholas Bellinger u32 iov_count = 0, tx_size = 0; 2467e48354ceSNicholas Bellinger struct iscsi_datain datain; 2468e48354ceSNicholas Bellinger struct iscsi_datain_req *dr; 2469e48354ceSNicholas Bellinger struct iscsi_data_rsp *hdr; 2470e48354ceSNicholas Bellinger struct kvec *iov; 24716f3c0e69SAndy Grover int eodr = 0; 24726f3c0e69SAndy Grover int ret; 2473e48354ceSNicholas Bellinger 2474e48354ceSNicholas Bellinger memset(&datain, 0, sizeof(struct iscsi_datain)); 2475e48354ceSNicholas Bellinger dr = iscsit_get_datain_values(cmd, &datain); 2476e48354ceSNicholas Bellinger if (!dr) { 2477e48354ceSNicholas Bellinger pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", 2478e48354ceSNicholas Bellinger cmd->init_task_tag); 2479e48354ceSNicholas Bellinger return -1; 2480e48354ceSNicholas Bellinger } 2481e48354ceSNicholas Bellinger 2482e48354ceSNicholas Bellinger /* 2483e48354ceSNicholas Bellinger * Be paranoid and double check the logic for now. 2484e48354ceSNicholas Bellinger */ 2485ebf1d95cSAndy Grover if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { 2486e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x, datain.offset: %u and" 2487e48354ceSNicholas Bellinger " datain.length: %u exceeds cmd->data_length: %u\n", 2488e48354ceSNicholas Bellinger cmd->init_task_tag, datain.offset, datain.length, 2489ebf1d95cSAndy Grover cmd->se_cmd.data_length); 2490e48354ceSNicholas Bellinger return -1; 2491e48354ceSNicholas Bellinger } 2492e48354ceSNicholas Bellinger 2493e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 2494e48354ceSNicholas Bellinger conn->sess->tx_data_octets += datain.length; 2495e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 2496e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 2497e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->read_bytes += datain.length; 2498e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 2499e48354ceSNicholas Bellinger } 2500e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 2501e48354ceSNicholas Bellinger /* 2502e48354ceSNicholas Bellinger * Special case for successfully execution w/ both DATAIN 2503e48354ceSNicholas Bellinger * and Sense Data. 2504e48354ceSNicholas Bellinger */ 2505e48354ceSNicholas Bellinger if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && 2506e48354ceSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) 2507e48354ceSNicholas Bellinger datain.flags &= ~ISCSI_FLAG_DATA_STATUS; 2508e48354ceSNicholas Bellinger else { 2509e48354ceSNicholas Bellinger if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || 2510e48354ceSNicholas Bellinger (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { 2511e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2512e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2513e48354ceSNicholas Bellinger set_statsn = 1; 2514e48354ceSNicholas Bellinger } else if (dr->dr_complete == 2515e48354ceSNicholas Bellinger DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) 2516e48354ceSNicholas Bellinger set_statsn = 1; 2517e48354ceSNicholas Bellinger } 2518e48354ceSNicholas Bellinger 2519e48354ceSNicholas Bellinger hdr = (struct iscsi_data_rsp *) cmd->pdu; 2520e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2521e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_DATA_IN; 2522e48354ceSNicholas Bellinger hdr->flags = datain.flags; 2523e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { 2524e48354ceSNicholas Bellinger if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { 2525e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; 25267e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 2527e48354ceSNicholas Bellinger } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { 2528e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; 25297e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 2530e48354ceSNicholas Bellinger } 2531e48354ceSNicholas Bellinger } 2532e48354ceSNicholas Bellinger hton24(hdr->dlength, datain.length); 2533e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_DATA_ACK) 2534e48354ceSNicholas Bellinger int_to_scsilun(cmd->se_cmd.orig_fe_lun, 2535e48354ceSNicholas Bellinger (struct scsi_lun *)&hdr->lun); 2536e48354ceSNicholas Bellinger else 2537e48354ceSNicholas Bellinger put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); 2538e48354ceSNicholas Bellinger 2539e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 2540e48354ceSNicholas Bellinger hdr->ttt = (hdr->flags & ISCSI_FLAG_DATA_ACK) ? 2541e48354ceSNicholas Bellinger cpu_to_be32(cmd->targ_xfer_tag) : 2542e48354ceSNicholas Bellinger 0xFFFFFFFF; 2543e48354ceSNicholas Bellinger hdr->statsn = (set_statsn) ? cpu_to_be32(cmd->stat_sn) : 2544e48354ceSNicholas Bellinger 0xFFFFFFFF; 2545e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2546e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2547e48354ceSNicholas Bellinger hdr->datasn = cpu_to_be32(datain.data_sn); 2548e48354ceSNicholas Bellinger hdr->offset = cpu_to_be32(datain.offset); 2549e48354ceSNicholas Bellinger 2550e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 2551e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 2552e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 2553e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 2554e48354ceSNicholas Bellinger 2555e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2556e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2557e48354ceSNicholas Bellinger 2558e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2559e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2560e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2561e48354ceSNicholas Bellinger 2562e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2563e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2564e48354ceSNicholas Bellinger 2565e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest" 2566e48354ceSNicholas Bellinger " for DataIN PDU 0x%08x\n", *header_digest); 2567e48354ceSNicholas Bellinger } 2568e48354ceSNicholas Bellinger 2569e48354ceSNicholas Bellinger iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length); 2570e48354ceSNicholas Bellinger if (iov_ret < 0) 2571e48354ceSNicholas Bellinger return -1; 2572e48354ceSNicholas Bellinger 2573e48354ceSNicholas Bellinger iov_count += iov_ret; 2574e48354ceSNicholas Bellinger tx_size += datain.length; 2575e48354ceSNicholas Bellinger 2576e48354ceSNicholas Bellinger cmd->padding = ((-datain.length) & 3); 2577e48354ceSNicholas Bellinger if (cmd->padding) { 2578e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 2579e48354ceSNicholas Bellinger iov[iov_count++].iov_len = cmd->padding; 2580e48354ceSNicholas Bellinger tx_size += cmd->padding; 2581e48354ceSNicholas Bellinger 2582e48354ceSNicholas Bellinger pr_debug("Attaching %u padding bytes\n", 2583e48354ceSNicholas Bellinger cmd->padding); 2584e48354ceSNicholas Bellinger } 2585e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2586e48354ceSNicholas Bellinger cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, 2587e48354ceSNicholas Bellinger datain.offset, datain.length, cmd->padding, cmd->pad_bytes); 2588e48354ceSNicholas Bellinger 2589e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 2590e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 2591e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2592e48354ceSNicholas Bellinger 2593e48354ceSNicholas Bellinger pr_debug("Attached CRC32C DataDigest %d bytes, crc" 2594e48354ceSNicholas Bellinger " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); 2595e48354ceSNicholas Bellinger } 2596e48354ceSNicholas Bellinger 2597e48354ceSNicholas Bellinger cmd->iov_data_count = iov_count; 2598e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2599e48354ceSNicholas Bellinger 2600e48354ceSNicholas Bellinger pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," 2601e48354ceSNicholas Bellinger " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", 2602e48354ceSNicholas Bellinger cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), 2603e48354ceSNicholas Bellinger ntohl(hdr->offset), datain.length, conn->cid); 2604e48354ceSNicholas Bellinger 26056f3c0e69SAndy Grover /* sendpage is preferred but can't insert markers */ 26066f3c0e69SAndy Grover if (!conn->conn_ops->IFMarker) 26076f3c0e69SAndy Grover ret = iscsit_fe_sendpage_sg(cmd, conn); 26086f3c0e69SAndy Grover else 26096f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 0); 26106f3c0e69SAndy Grover 26116f3c0e69SAndy Grover iscsit_unmap_iovec(cmd); 26126f3c0e69SAndy Grover 26136f3c0e69SAndy Grover if (ret < 0) { 26146f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 26156f3c0e69SAndy Grover return ret; 26166f3c0e69SAndy Grover } 26176f3c0e69SAndy Grover 2618e48354ceSNicholas Bellinger if (dr->dr_complete) { 26196f3c0e69SAndy Grover eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? 2620e48354ceSNicholas Bellinger 2 : 1; 2621e48354ceSNicholas Bellinger iscsit_free_datain_req(cmd, dr); 2622e48354ceSNicholas Bellinger } 2623e48354ceSNicholas Bellinger 26246f3c0e69SAndy Grover return eodr; 2625e48354ceSNicholas Bellinger } 2626e48354ceSNicholas Bellinger 2627e48354ceSNicholas Bellinger static int iscsit_send_logout_response( 2628e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2629e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2630e48354ceSNicholas Bellinger { 2631e48354ceSNicholas Bellinger int niov = 0, tx_size; 2632e48354ceSNicholas Bellinger struct iscsi_conn *logout_conn = NULL; 2633e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 2634e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2635e48354ceSNicholas Bellinger struct kvec *iov; 2636e48354ceSNicholas Bellinger struct iscsi_logout_rsp *hdr; 2637e48354ceSNicholas Bellinger /* 2638e48354ceSNicholas Bellinger * The actual shutting down of Sessions and/or Connections 2639e48354ceSNicholas Bellinger * for CLOSESESSION and CLOSECONNECTION Logout Requests 2640e48354ceSNicholas Bellinger * is done in scsi_logout_post_handler(). 2641e48354ceSNicholas Bellinger */ 2642e48354ceSNicholas Bellinger switch (cmd->logout_reason) { 2643e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_SESSION: 2644e48354ceSNicholas Bellinger pr_debug("iSCSI session logout successful, setting" 2645e48354ceSNicholas Bellinger " logout response to ISCSI_LOGOUT_SUCCESS.\n"); 2646e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2647e48354ceSNicholas Bellinger break; 2648e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: 2649e48354ceSNicholas Bellinger if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) 2650e48354ceSNicholas Bellinger break; 2651e48354ceSNicholas Bellinger /* 2652e48354ceSNicholas Bellinger * For CLOSECONNECTION logout requests carrying 2653e48354ceSNicholas Bellinger * a matching logout CID -> local CID, the reference 2654e48354ceSNicholas Bellinger * for the local CID will have been incremented in 2655e48354ceSNicholas Bellinger * iscsi_logout_closeconnection(). 2656e48354ceSNicholas Bellinger * 2657e48354ceSNicholas Bellinger * For CLOSECONNECTION logout requests carrying 2658e48354ceSNicholas Bellinger * a different CID than the connection it arrived 2659e48354ceSNicholas Bellinger * on, the connection responding to cmd->logout_cid 2660e48354ceSNicholas Bellinger * is stopped in iscsit_logout_post_handler_diffcid(). 2661e48354ceSNicholas Bellinger */ 2662e48354ceSNicholas Bellinger 2663e48354ceSNicholas Bellinger pr_debug("iSCSI CID: %hu logout on CID: %hu" 2664e48354ceSNicholas Bellinger " successful.\n", cmd->logout_cid, conn->cid); 2665e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2666e48354ceSNicholas Bellinger break; 2667e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_RECOVERY: 2668e48354ceSNicholas Bellinger if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || 2669e48354ceSNicholas Bellinger (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) 2670e48354ceSNicholas Bellinger break; 2671e48354ceSNicholas Bellinger /* 2672e48354ceSNicholas Bellinger * If the connection is still active from our point of view 2673e48354ceSNicholas Bellinger * force connection recovery to occur. 2674e48354ceSNicholas Bellinger */ 2675e48354ceSNicholas Bellinger logout_conn = iscsit_get_conn_from_cid_rcfr(sess, 2676e48354ceSNicholas Bellinger cmd->logout_cid); 2677ee1b1b9cSAndy Grover if (logout_conn) { 2678e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(logout_conn); 2679e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(logout_conn); 2680e48354ceSNicholas Bellinger } 2681e48354ceSNicholas Bellinger 2682e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 2683e48354ceSNicholas Bellinger conn->sess, cmd->logout_cid); 2684e48354ceSNicholas Bellinger if (!cr) { 2685e48354ceSNicholas Bellinger pr_err("Unable to locate CID: %hu for" 2686e48354ceSNicholas Bellinger " REMOVECONNFORRECOVERY Logout Request.\n", 2687e48354ceSNicholas Bellinger cmd->logout_cid); 2688e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; 2689e48354ceSNicholas Bellinger break; 2690e48354ceSNicholas Bellinger } 2691e48354ceSNicholas Bellinger 2692e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); 2693e48354ceSNicholas Bellinger 2694e48354ceSNicholas Bellinger pr_debug("iSCSI REMOVECONNFORRECOVERY logout" 2695e48354ceSNicholas Bellinger " for recovery for CID: %hu on CID: %hu successful.\n", 2696e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2697e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2698e48354ceSNicholas Bellinger break; 2699e48354ceSNicholas Bellinger default: 2700e48354ceSNicholas Bellinger pr_err("Unknown cmd->logout_reason: 0x%02x\n", 2701e48354ceSNicholas Bellinger cmd->logout_reason); 2702e48354ceSNicholas Bellinger return -1; 2703e48354ceSNicholas Bellinger } 2704e48354ceSNicholas Bellinger 2705e48354ceSNicholas Bellinger tx_size = ISCSI_HDR_LEN; 2706e48354ceSNicholas Bellinger hdr = (struct iscsi_logout_rsp *)cmd->pdu; 2707e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2708e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGOUT_RSP; 2709e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2710e48354ceSNicholas Bellinger hdr->response = cmd->logout_response; 2711e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 2712e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2713e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2714e48354ceSNicholas Bellinger 2715e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2716e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2717e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2718e48354ceSNicholas Bellinger 2719e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 2720e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->pdu; 2721e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_HDR_LEN; 2722e48354ceSNicholas Bellinger 2723e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2724e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2725e48354ceSNicholas Bellinger 2726e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2727e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2728e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2729e48354ceSNicholas Bellinger 2730e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2731e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2732e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2733e48354ceSNicholas Bellinger " Logout Response 0x%08x\n", *header_digest); 2734e48354ceSNicholas Bellinger } 2735e48354ceSNicholas Bellinger cmd->iov_misc_count = niov; 2736e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2737e48354ceSNicholas Bellinger 2738e48354ceSNicholas Bellinger pr_debug("Sending Logout Response ITT: 0x%08x StatSN:" 2739e48354ceSNicholas Bellinger " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", 2740e48354ceSNicholas Bellinger cmd->init_task_tag, cmd->stat_sn, hdr->response, 2741e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2742e48354ceSNicholas Bellinger 2743e48354ceSNicholas Bellinger return 0; 2744e48354ceSNicholas Bellinger } 2745e48354ceSNicholas Bellinger 2746e48354ceSNicholas Bellinger /* 2747e48354ceSNicholas Bellinger * Unsolicited NOPIN, either requesting a response or not. 2748e48354ceSNicholas Bellinger */ 2749e48354ceSNicholas Bellinger static int iscsit_send_unsolicited_nopin( 2750e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2751e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2752e48354ceSNicholas Bellinger int want_response) 2753e48354ceSNicholas Bellinger { 2754e48354ceSNicholas Bellinger int tx_size = ISCSI_HDR_LEN; 2755e48354ceSNicholas Bellinger struct iscsi_nopin *hdr; 27566f3c0e69SAndy Grover int ret; 2757e48354ceSNicholas Bellinger 2758e48354ceSNicholas Bellinger hdr = (struct iscsi_nopin *) cmd->pdu; 2759e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2760e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_NOOP_IN; 2761e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2762e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 2763e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 2764e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn; 2765e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2766e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2767e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2768e48354ceSNicholas Bellinger 2769e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2770e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2771e48354ceSNicholas Bellinger 2772e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2773e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2774e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2775e48354ceSNicholas Bellinger 2776e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2777e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2778e48354ceSNicholas Bellinger " NopIN 0x%08x\n", *header_digest); 2779e48354ceSNicholas Bellinger } 2780e48354ceSNicholas Bellinger 2781e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2782e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = tx_size; 2783e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2784e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2785e48354ceSNicholas Bellinger 2786e48354ceSNicholas Bellinger pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" 2787e48354ceSNicholas Bellinger " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); 2788e48354ceSNicholas Bellinger 27896f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 1); 27906f3c0e69SAndy Grover if (ret < 0) { 27916f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 27926f3c0e69SAndy Grover return ret; 27936f3c0e69SAndy Grover } 27946f3c0e69SAndy Grover 27956f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 27966f3c0e69SAndy Grover cmd->i_state = want_response ? 27976f3c0e69SAndy Grover ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; 27986f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 27996f3c0e69SAndy Grover 2800e48354ceSNicholas Bellinger return 0; 2801e48354ceSNicholas Bellinger } 2802e48354ceSNicholas Bellinger 2803e48354ceSNicholas Bellinger static int iscsit_send_nopin_response( 2804e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2805e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2806e48354ceSNicholas Bellinger { 2807e48354ceSNicholas Bellinger int niov = 0, tx_size; 2808e48354ceSNicholas Bellinger u32 padding = 0; 2809e48354ceSNicholas Bellinger struct kvec *iov; 2810e48354ceSNicholas Bellinger struct iscsi_nopin *hdr; 2811e48354ceSNicholas Bellinger 2812e48354ceSNicholas Bellinger tx_size = ISCSI_HDR_LEN; 2813e48354ceSNicholas Bellinger hdr = (struct iscsi_nopin *) cmd->pdu; 2814e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2815e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_NOOP_IN; 2816e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2817e48354ceSNicholas Bellinger hton24(hdr->dlength, cmd->buf_ptr_size); 2818e48354ceSNicholas Bellinger put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); 2819e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 2820e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 2821e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2822e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2823e48354ceSNicholas Bellinger 2824e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2825e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2826e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2827e48354ceSNicholas Bellinger 2828e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 2829e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->pdu; 2830e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_HDR_LEN; 2831e48354ceSNicholas Bellinger 2832e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2833e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2834e48354ceSNicholas Bellinger 2835e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2836e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2837e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2838e48354ceSNicholas Bellinger 2839e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2840e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2841e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest" 2842e48354ceSNicholas Bellinger " to NopIn 0x%08x\n", *header_digest); 2843e48354ceSNicholas Bellinger } 2844e48354ceSNicholas Bellinger 2845e48354ceSNicholas Bellinger /* 2846e48354ceSNicholas Bellinger * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. 2847e48354ceSNicholas Bellinger * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. 2848e48354ceSNicholas Bellinger */ 2849e48354ceSNicholas Bellinger if (cmd->buf_ptr_size) { 2850e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->buf_ptr; 2851e48354ceSNicholas Bellinger iov[niov++].iov_len = cmd->buf_ptr_size; 2852e48354ceSNicholas Bellinger tx_size += cmd->buf_ptr_size; 2853e48354ceSNicholas Bellinger 2854e48354ceSNicholas Bellinger pr_debug("Echoing back %u bytes of ping" 2855e48354ceSNicholas Bellinger " data.\n", cmd->buf_ptr_size); 2856e48354ceSNicholas Bellinger 2857e48354ceSNicholas Bellinger padding = ((-cmd->buf_ptr_size) & 3); 2858e48354ceSNicholas Bellinger if (padding != 0) { 2859e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->pad_bytes; 2860e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 2861e48354ceSNicholas Bellinger tx_size += padding; 2862e48354ceSNicholas Bellinger pr_debug("Attaching %u additional" 2863e48354ceSNicholas Bellinger " padding bytes.\n", padding); 2864e48354ceSNicholas Bellinger } 2865e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2866e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2867e48354ceSNicholas Bellinger cmd->buf_ptr, cmd->buf_ptr_size, 2868e48354ceSNicholas Bellinger padding, (u8 *)&cmd->pad_bytes, 2869e48354ceSNicholas Bellinger (u8 *)&cmd->data_crc); 2870e48354ceSNicholas Bellinger 2871e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->data_crc; 2872e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 2873e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2874e48354ceSNicholas Bellinger pr_debug("Attached DataDigest for %u" 2875e48354ceSNicholas Bellinger " bytes of ping data, CRC 0x%08x\n", 2876e48354ceSNicholas Bellinger cmd->buf_ptr_size, cmd->data_crc); 2877e48354ceSNicholas Bellinger } 2878e48354ceSNicholas Bellinger } 2879e48354ceSNicholas Bellinger 2880e48354ceSNicholas Bellinger cmd->iov_misc_count = niov; 2881e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2882e48354ceSNicholas Bellinger 2883e48354ceSNicholas Bellinger pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:" 2884e48354ceSNicholas Bellinger " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag, 2885e48354ceSNicholas Bellinger cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); 2886e48354ceSNicholas Bellinger 2887e48354ceSNicholas Bellinger return 0; 2888e48354ceSNicholas Bellinger } 2889e48354ceSNicholas Bellinger 28906f3c0e69SAndy Grover static int iscsit_send_r2t( 2891e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2892e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2893e48354ceSNicholas Bellinger { 2894e48354ceSNicholas Bellinger int tx_size = 0; 2895e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 2896e48354ceSNicholas Bellinger struct iscsi_r2t_rsp *hdr; 28976f3c0e69SAndy Grover int ret; 2898e48354ceSNicholas Bellinger 2899e48354ceSNicholas Bellinger r2t = iscsit_get_r2t_from_list(cmd); 2900e48354ceSNicholas Bellinger if (!r2t) 2901e48354ceSNicholas Bellinger return -1; 2902e48354ceSNicholas Bellinger 2903e48354ceSNicholas Bellinger hdr = (struct iscsi_r2t_rsp *) cmd->pdu; 2904e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2905e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_R2T; 2906e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2907e48354ceSNicholas Bellinger int_to_scsilun(cmd->se_cmd.orig_fe_lun, 2908e48354ceSNicholas Bellinger (struct scsi_lun *)&hdr->lun); 2909e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 2910e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 2911e48354ceSNicholas Bellinger r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; 2912e48354ceSNicholas Bellinger if (r2t->targ_xfer_tag == 0xFFFFFFFF) 2913e48354ceSNicholas Bellinger r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; 2914e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 2915e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); 2916e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(conn->stat_sn); 2917e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2918e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2919e48354ceSNicholas Bellinger hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); 2920e48354ceSNicholas Bellinger hdr->data_offset = cpu_to_be32(r2t->offset); 2921e48354ceSNicholas Bellinger hdr->data_length = cpu_to_be32(r2t->xfer_len); 2922e48354ceSNicholas Bellinger 2923e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2924e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; 2925e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 2926e48354ceSNicholas Bellinger 2927e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2928e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2929e48354ceSNicholas Bellinger 2930e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2931e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2932e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2933e48354ceSNicholas Bellinger 2934e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; 2935e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2936e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for R2T" 2937e48354ceSNicholas Bellinger " PDU 0x%08x\n", *header_digest); 2938e48354ceSNicholas Bellinger } 2939e48354ceSNicholas Bellinger 2940e48354ceSNicholas Bellinger pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" 2941e48354ceSNicholas Bellinger " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", 2942e48354ceSNicholas Bellinger (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, 2943e48354ceSNicholas Bellinger r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, 2944e48354ceSNicholas Bellinger r2t->offset, r2t->xfer_len, conn->cid); 2945e48354ceSNicholas Bellinger 2946e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2947e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2948e48354ceSNicholas Bellinger 2949e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 2950e48354ceSNicholas Bellinger r2t->sent_r2t = 1; 2951e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 2952e48354ceSNicholas Bellinger 29536f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 1); 29546f3c0e69SAndy Grover if (ret < 0) { 29556f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 29566f3c0e69SAndy Grover return ret; 29576f3c0e69SAndy Grover } 29586f3c0e69SAndy Grover 29596f3c0e69SAndy Grover spin_lock_bh(&cmd->dataout_timeout_lock); 29606f3c0e69SAndy Grover iscsit_start_dataout_timer(cmd, conn); 29616f3c0e69SAndy Grover spin_unlock_bh(&cmd->dataout_timeout_lock); 29626f3c0e69SAndy Grover 2963e48354ceSNicholas Bellinger return 0; 2964e48354ceSNicholas Bellinger } 2965e48354ceSNicholas Bellinger 2966e48354ceSNicholas Bellinger /* 29678b1e1244SAndy Grover * @recovery: If called from iscsi_task_reassign_complete_write() for 2968e48354ceSNicholas Bellinger * connection recovery. 2969e48354ceSNicholas Bellinger */ 2970e48354ceSNicholas Bellinger int iscsit_build_r2ts_for_cmd( 2971e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2972e48354ceSNicholas Bellinger struct iscsi_conn *conn, 29738b1e1244SAndy Grover bool recovery) 2974e48354ceSNicholas Bellinger { 2975e48354ceSNicholas Bellinger int first_r2t = 1; 2976e48354ceSNicholas Bellinger u32 offset = 0, xfer_len = 0; 2977e48354ceSNicholas Bellinger 2978e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 2979e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { 2980e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 2981e48354ceSNicholas Bellinger return 0; 2982e48354ceSNicholas Bellinger } 2983e48354ceSNicholas Bellinger 29848b1e1244SAndy Grover if (conn->sess->sess_ops->DataSequenceInOrder && 29858b1e1244SAndy Grover !recovery) 2986c6037cc5SAndy Grover cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); 2987e48354ceSNicholas Bellinger 2988e48354ceSNicholas Bellinger while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { 2989e48354ceSNicholas Bellinger if (conn->sess->sess_ops->DataSequenceInOrder) { 2990e48354ceSNicholas Bellinger offset = cmd->r2t_offset; 2991e48354ceSNicholas Bellinger 29928b1e1244SAndy Grover if (first_r2t && recovery) { 29938b1e1244SAndy Grover int new_data_end = offset + 29948b1e1244SAndy Grover conn->sess->sess_ops->MaxBurstLength - 29958b1e1244SAndy Grover cmd->next_burst_len; 29968b1e1244SAndy Grover 2997ebf1d95cSAndy Grover if (new_data_end > cmd->se_cmd.data_length) 2998ebf1d95cSAndy Grover xfer_len = cmd->se_cmd.data_length - offset; 29998b1e1244SAndy Grover else 30008b1e1244SAndy Grover xfer_len = 30018b1e1244SAndy Grover conn->sess->sess_ops->MaxBurstLength - 30028b1e1244SAndy Grover cmd->next_burst_len; 3003e48354ceSNicholas Bellinger } else { 30048b1e1244SAndy Grover int new_data_end = offset + 3005e48354ceSNicholas Bellinger conn->sess->sess_ops->MaxBurstLength; 30068b1e1244SAndy Grover 3007ebf1d95cSAndy Grover if (new_data_end > cmd->se_cmd.data_length) 3008ebf1d95cSAndy Grover xfer_len = cmd->se_cmd.data_length - offset; 30098b1e1244SAndy Grover else 30108b1e1244SAndy Grover xfer_len = conn->sess->sess_ops->MaxBurstLength; 3011e48354ceSNicholas Bellinger } 3012e48354ceSNicholas Bellinger cmd->r2t_offset += xfer_len; 3013e48354ceSNicholas Bellinger 3014ebf1d95cSAndy Grover if (cmd->r2t_offset == cmd->se_cmd.data_length) 3015e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_SENT_LAST_R2T; 3016e48354ceSNicholas Bellinger } else { 3017e48354ceSNicholas Bellinger struct iscsi_seq *seq; 3018e48354ceSNicholas Bellinger 3019e48354ceSNicholas Bellinger seq = iscsit_get_seq_holder_for_r2t(cmd); 3020e48354ceSNicholas Bellinger if (!seq) { 3021e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3022e48354ceSNicholas Bellinger return -1; 3023e48354ceSNicholas Bellinger } 3024e48354ceSNicholas Bellinger 3025e48354ceSNicholas Bellinger offset = seq->offset; 3026e48354ceSNicholas Bellinger xfer_len = seq->xfer_len; 3027e48354ceSNicholas Bellinger 3028e48354ceSNicholas Bellinger if (cmd->seq_send_order == cmd->seq_count) 3029e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_SENT_LAST_R2T; 3030e48354ceSNicholas Bellinger } 3031e48354ceSNicholas Bellinger cmd->outstanding_r2ts++; 3032e48354ceSNicholas Bellinger first_r2t = 0; 3033e48354ceSNicholas Bellinger 3034e48354ceSNicholas Bellinger if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { 3035e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3036e48354ceSNicholas Bellinger return -1; 3037e48354ceSNicholas Bellinger } 3038e48354ceSNicholas Bellinger 3039e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_SENT_LAST_R2T) 3040e48354ceSNicholas Bellinger break; 3041e48354ceSNicholas Bellinger } 3042e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3043e48354ceSNicholas Bellinger 3044e48354ceSNicholas Bellinger return 0; 3045e48354ceSNicholas Bellinger } 3046e48354ceSNicholas Bellinger 3047e48354ceSNicholas Bellinger static int iscsit_send_status( 3048e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3049e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3050e48354ceSNicholas Bellinger { 3051e48354ceSNicholas Bellinger u8 iov_count = 0, recovery; 3052e48354ceSNicholas Bellinger u32 padding = 0, tx_size = 0; 3053e48354ceSNicholas Bellinger struct iscsi_scsi_rsp *hdr; 3054e48354ceSNicholas Bellinger struct kvec *iov; 3055e48354ceSNicholas Bellinger 3056e48354ceSNicholas Bellinger recovery = (cmd->i_state != ISTATE_SEND_STATUS); 3057e48354ceSNicholas Bellinger if (!recovery) 3058e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3059e48354ceSNicholas Bellinger 3060e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 3061e48354ceSNicholas Bellinger conn->sess->rsp_pdus++; 3062e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 3063e48354ceSNicholas Bellinger 3064e48354ceSNicholas Bellinger hdr = (struct iscsi_scsi_rsp *) cmd->pdu; 3065e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3066e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; 3067e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3068e48354ceSNicholas Bellinger if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { 3069e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; 30707e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 3071e48354ceSNicholas Bellinger } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { 3072e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 30737e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 3074e48354ceSNicholas Bellinger } 3075e48354ceSNicholas Bellinger hdr->response = cmd->iscsi_response; 3076e48354ceSNicholas Bellinger hdr->cmd_status = cmd->se_cmd.scsi_status; 3077e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 3078e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3079e48354ceSNicholas Bellinger 3080e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3081e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3082e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3083e48354ceSNicholas Bellinger 3084e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3085e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3086e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3087e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 3088e48354ceSNicholas Bellinger 3089e48354ceSNicholas Bellinger /* 3090e48354ceSNicholas Bellinger * Attach SENSE DATA payload to iSCSI Response PDU 3091e48354ceSNicholas Bellinger */ 3092e48354ceSNicholas Bellinger if (cmd->se_cmd.sense_buffer && 3093e48354ceSNicholas Bellinger ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 3094e48354ceSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 30959c58b7ddSRoland Dreier put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); 30969c58b7ddSRoland Dreier cmd->se_cmd.scsi_sense_length += sizeof (__be16); 30979c58b7ddSRoland Dreier 3098e48354ceSNicholas Bellinger padding = -(cmd->se_cmd.scsi_sense_length) & 3; 3099e48354ceSNicholas Bellinger hton24(hdr->dlength, cmd->se_cmd.scsi_sense_length); 31009c58b7ddSRoland Dreier iov[iov_count].iov_base = cmd->sense_buffer; 3101e48354ceSNicholas Bellinger iov[iov_count++].iov_len = 3102e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding); 3103e48354ceSNicholas Bellinger tx_size += cmd->se_cmd.scsi_sense_length; 3104e48354ceSNicholas Bellinger 3105e48354ceSNicholas Bellinger if (padding) { 31069c58b7ddSRoland Dreier memset(cmd->sense_buffer + 3107e48354ceSNicholas Bellinger cmd->se_cmd.scsi_sense_length, 0, padding); 3108e48354ceSNicholas Bellinger tx_size += padding; 3109e48354ceSNicholas Bellinger pr_debug("Adding %u bytes of padding to" 3110e48354ceSNicholas Bellinger " SENSE.\n", padding); 3111e48354ceSNicholas Bellinger } 3112e48354ceSNicholas Bellinger 3113e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3114e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 31159c58b7ddSRoland Dreier cmd->sense_buffer, 3116e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding), 3117e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3118e48354ceSNicholas Bellinger 3119e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3120e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3121e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3122e48354ceSNicholas Bellinger 3123e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 DataDigest for" 3124e48354ceSNicholas Bellinger " SENSE, %u bytes CRC 0x%08x\n", 3125e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding), 3126e48354ceSNicholas Bellinger cmd->data_crc); 3127e48354ceSNicholas Bellinger } 3128e48354ceSNicholas Bellinger 3129e48354ceSNicholas Bellinger pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" 3130e48354ceSNicholas Bellinger " Response PDU\n", 3131e48354ceSNicholas Bellinger cmd->se_cmd.scsi_sense_length); 3132e48354ceSNicholas Bellinger } 3133e48354ceSNicholas Bellinger 3134e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3135e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3136e48354ceSNicholas Bellinger 3137e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3138e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3139e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3140e48354ceSNicholas Bellinger 3141e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3142e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3143e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for Response" 3144e48354ceSNicholas Bellinger " PDU 0x%08x\n", *header_digest); 3145e48354ceSNicholas Bellinger } 3146e48354ceSNicholas Bellinger 3147e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3148e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3149e48354ceSNicholas Bellinger 3150e48354ceSNicholas Bellinger pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x," 3151e48354ceSNicholas Bellinger " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", 3152e48354ceSNicholas Bellinger (!recovery) ? "" : "Recovery ", cmd->init_task_tag, 3153e48354ceSNicholas Bellinger cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid); 3154e48354ceSNicholas Bellinger 3155e48354ceSNicholas Bellinger return 0; 3156e48354ceSNicholas Bellinger } 3157e48354ceSNicholas Bellinger 3158e48354ceSNicholas Bellinger static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) 3159e48354ceSNicholas Bellinger { 3160e48354ceSNicholas Bellinger switch (se_tmr->response) { 3161e48354ceSNicholas Bellinger case TMR_FUNCTION_COMPLETE: 3162e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_COMPLETE; 3163e48354ceSNicholas Bellinger case TMR_TASK_DOES_NOT_EXIST: 3164e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NO_TASK; 3165e48354ceSNicholas Bellinger case TMR_LUN_DOES_NOT_EXIST: 3166e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NO_LUN; 3167e48354ceSNicholas Bellinger case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: 3168e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NOT_SUPPORTED; 3169e48354ceSNicholas Bellinger case TMR_FUNCTION_AUTHORIZATION_FAILED: 3170e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_AUTH_FAILED; 3171e48354ceSNicholas Bellinger case TMR_FUNCTION_REJECTED: 3172e48354ceSNicholas Bellinger default: 3173e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_REJECTED; 3174e48354ceSNicholas Bellinger } 3175e48354ceSNicholas Bellinger } 3176e48354ceSNicholas Bellinger 3177e48354ceSNicholas Bellinger static int iscsit_send_task_mgt_rsp( 3178e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3179e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3180e48354ceSNicholas Bellinger { 3181e48354ceSNicholas Bellinger struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; 3182e48354ceSNicholas Bellinger struct iscsi_tm_rsp *hdr; 3183e48354ceSNicholas Bellinger u32 tx_size = 0; 3184e48354ceSNicholas Bellinger 3185e48354ceSNicholas Bellinger hdr = (struct iscsi_tm_rsp *) cmd->pdu; 3186e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3187e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; 31887ae0b103SNicholas Bellinger hdr->flags = ISCSI_FLAG_CMD_FINAL; 3189e48354ceSNicholas Bellinger hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); 3190e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 3191e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3192e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3193e48354ceSNicholas Bellinger 3194e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3195e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3196e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3197e48354ceSNicholas Bellinger 3198e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 3199e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; 3200e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 3201e48354ceSNicholas Bellinger 3202e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3203e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3204e48354ceSNicholas Bellinger 3205e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3206e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3207e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3208e48354ceSNicholas Bellinger 3209e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; 3210e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3211e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for Task" 3212e48354ceSNicholas Bellinger " Mgmt Response PDU 0x%08x\n", *header_digest); 3213e48354ceSNicholas Bellinger } 3214e48354ceSNicholas Bellinger 3215e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 3216e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3217e48354ceSNicholas Bellinger 3218e48354ceSNicholas Bellinger pr_debug("Built Task Management Response ITT: 0x%08x," 3219e48354ceSNicholas Bellinger " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", 3220e48354ceSNicholas Bellinger cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); 3221e48354ceSNicholas Bellinger 3222e48354ceSNicholas Bellinger return 0; 3223e48354ceSNicholas Bellinger } 3224e48354ceSNicholas Bellinger 32252f9bc894SNicholas Bellinger static bool iscsit_check_inaddr_any(struct iscsi_np *np) 32262f9bc894SNicholas Bellinger { 32272f9bc894SNicholas Bellinger bool ret = false; 32282f9bc894SNicholas Bellinger 32292f9bc894SNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 32302f9bc894SNicholas Bellinger const struct sockaddr_in6 sin6 = { 32312f9bc894SNicholas Bellinger .sin6_addr = IN6ADDR_ANY_INIT }; 32322f9bc894SNicholas Bellinger struct sockaddr_in6 *sock_in6 = 32332f9bc894SNicholas Bellinger (struct sockaddr_in6 *)&np->np_sockaddr; 32342f9bc894SNicholas Bellinger 32352f9bc894SNicholas Bellinger if (!memcmp(sock_in6->sin6_addr.s6_addr, 32362f9bc894SNicholas Bellinger sin6.sin6_addr.s6_addr, 16)) 32372f9bc894SNicholas Bellinger ret = true; 32382f9bc894SNicholas Bellinger } else { 32392f9bc894SNicholas Bellinger struct sockaddr_in * sock_in = 32402f9bc894SNicholas Bellinger (struct sockaddr_in *)&np->np_sockaddr; 32412f9bc894SNicholas Bellinger 32422f9bc894SNicholas Bellinger if (sock_in->sin_addr.s_addr == INADDR_ANY) 32432f9bc894SNicholas Bellinger ret = true; 32442f9bc894SNicholas Bellinger } 32452f9bc894SNicholas Bellinger 32462f9bc894SNicholas Bellinger return ret; 32472f9bc894SNicholas Bellinger } 32482f9bc894SNicholas Bellinger 32498b1e1244SAndy Grover #define SENDTARGETS_BUF_LIMIT 32768U 32508b1e1244SAndy Grover 3251e48354ceSNicholas Bellinger static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) 3252e48354ceSNicholas Bellinger { 3253e48354ceSNicholas Bellinger char *payload = NULL; 3254e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 3255e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 3256e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 3257e48354ceSNicholas Bellinger struct iscsi_tpg_np *tpg_np; 3258e48354ceSNicholas Bellinger int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; 32598b1e1244SAndy Grover unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ 3260e48354ceSNicholas Bellinger 32618b1e1244SAndy Grover buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, 32628b1e1244SAndy Grover SENDTARGETS_BUF_LIMIT); 3263e48354ceSNicholas Bellinger 3264e48354ceSNicholas Bellinger payload = kzalloc(buffer_len, GFP_KERNEL); 3265e48354ceSNicholas Bellinger if (!payload) { 3266e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for sendtargets" 3267e48354ceSNicholas Bellinger " response.\n"); 3268e48354ceSNicholas Bellinger return -ENOMEM; 3269e48354ceSNicholas Bellinger } 3270e48354ceSNicholas Bellinger 3271e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 3272e48354ceSNicholas Bellinger list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { 3273e48354ceSNicholas Bellinger len = sprintf(buf, "TargetName=%s", tiqn->tiqn); 3274e48354ceSNicholas Bellinger len += 1; 3275e48354ceSNicholas Bellinger 3276e48354ceSNicholas Bellinger if ((len + payload_len) > buffer_len) { 3277e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_tpg_lock); 3278e48354ceSNicholas Bellinger end_of_buf = 1; 3279e48354ceSNicholas Bellinger goto eob; 3280e48354ceSNicholas Bellinger } 32818359cf43SJörn Engel memcpy(payload + payload_len, buf, len); 3282e48354ceSNicholas Bellinger payload_len += len; 3283e48354ceSNicholas Bellinger 3284e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_tpg_lock); 3285e48354ceSNicholas Bellinger list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { 3286e48354ceSNicholas Bellinger 3287e48354ceSNicholas Bellinger spin_lock(&tpg->tpg_state_lock); 3288e48354ceSNicholas Bellinger if ((tpg->tpg_state == TPG_STATE_FREE) || 3289e48354ceSNicholas Bellinger (tpg->tpg_state == TPG_STATE_INACTIVE)) { 3290e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_state_lock); 3291e48354ceSNicholas Bellinger continue; 3292e48354ceSNicholas Bellinger } 3293e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_state_lock); 3294e48354ceSNicholas Bellinger 3295e48354ceSNicholas Bellinger spin_lock(&tpg->tpg_np_lock); 3296e48354ceSNicholas Bellinger list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, 3297e48354ceSNicholas Bellinger tpg_np_list) { 32982f9bc894SNicholas Bellinger struct iscsi_np *np = tpg_np->tpg_np; 32992f9bc894SNicholas Bellinger bool inaddr_any = iscsit_check_inaddr_any(np); 33002f9bc894SNicholas Bellinger 3301e48354ceSNicholas Bellinger len = sprintf(buf, "TargetAddress=" 3302e48354ceSNicholas Bellinger "%s%s%s:%hu,%hu", 33032f9bc894SNicholas Bellinger (np->np_sockaddr.ss_family == AF_INET6) ? 33042f9bc894SNicholas Bellinger "[" : "", (inaddr_any == false) ? 33052f9bc894SNicholas Bellinger np->np_ip : conn->local_ip, 33062f9bc894SNicholas Bellinger (np->np_sockaddr.ss_family == AF_INET6) ? 33072f9bc894SNicholas Bellinger "]" : "", (inaddr_any == false) ? 33082f9bc894SNicholas Bellinger np->np_port : conn->local_port, 3309e48354ceSNicholas Bellinger tpg->tpgt); 3310e48354ceSNicholas Bellinger len += 1; 3311e48354ceSNicholas Bellinger 3312e48354ceSNicholas Bellinger if ((len + payload_len) > buffer_len) { 3313e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_np_lock); 3314e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_tpg_lock); 3315e48354ceSNicholas Bellinger end_of_buf = 1; 3316e48354ceSNicholas Bellinger goto eob; 3317e48354ceSNicholas Bellinger } 33188359cf43SJörn Engel memcpy(payload + payload_len, buf, len); 3319e48354ceSNicholas Bellinger payload_len += len; 3320e48354ceSNicholas Bellinger } 3321e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_np_lock); 3322e48354ceSNicholas Bellinger } 3323e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_tpg_lock); 3324e48354ceSNicholas Bellinger eob: 3325e48354ceSNicholas Bellinger if (end_of_buf) 3326e48354ceSNicholas Bellinger break; 3327e48354ceSNicholas Bellinger } 3328e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 3329e48354ceSNicholas Bellinger 3330e48354ceSNicholas Bellinger cmd->buf_ptr = payload; 3331e48354ceSNicholas Bellinger 3332e48354ceSNicholas Bellinger return payload_len; 3333e48354ceSNicholas Bellinger } 3334e48354ceSNicholas Bellinger 3335e48354ceSNicholas Bellinger /* 3336e48354ceSNicholas Bellinger * FIXME: Add support for F_BIT and C_BIT when the length is longer than 3337e48354ceSNicholas Bellinger * MaxRecvDataSegmentLength. 3338e48354ceSNicholas Bellinger */ 3339e48354ceSNicholas Bellinger static int iscsit_send_text_rsp( 3340e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3341e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3342e48354ceSNicholas Bellinger { 3343e48354ceSNicholas Bellinger struct iscsi_text_rsp *hdr; 3344e48354ceSNicholas Bellinger struct kvec *iov; 3345e48354ceSNicholas Bellinger u32 padding = 0, tx_size = 0; 3346e48354ceSNicholas Bellinger int text_length, iov_count = 0; 3347e48354ceSNicholas Bellinger 3348e48354ceSNicholas Bellinger text_length = iscsit_build_sendtargets_response(cmd); 3349e48354ceSNicholas Bellinger if (text_length < 0) 3350e48354ceSNicholas Bellinger return text_length; 3351e48354ceSNicholas Bellinger 3352e48354ceSNicholas Bellinger padding = ((-text_length) & 3); 3353e48354ceSNicholas Bellinger if (padding != 0) { 3354e48354ceSNicholas Bellinger memset(cmd->buf_ptr + text_length, 0, padding); 3355e48354ceSNicholas Bellinger pr_debug("Attaching %u additional bytes for" 3356e48354ceSNicholas Bellinger " padding.\n", padding); 3357e48354ceSNicholas Bellinger } 3358e48354ceSNicholas Bellinger 3359e48354ceSNicholas Bellinger hdr = (struct iscsi_text_rsp *) cmd->pdu; 3360e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3361e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_TEXT_RSP; 3362e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3363e48354ceSNicholas Bellinger hton24(hdr->dlength, text_length); 3364e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(cmd->init_task_tag); 3365e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 3366e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3367e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3368e48354ceSNicholas Bellinger 3369e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3370e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3371e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3372e48354ceSNicholas Bellinger 3373e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3374e48354ceSNicholas Bellinger 3375e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3376e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3377e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->buf_ptr; 3378e48354ceSNicholas Bellinger iov[iov_count++].iov_len = text_length + padding; 3379e48354ceSNicholas Bellinger 3380e48354ceSNicholas Bellinger tx_size += (ISCSI_HDR_LEN + text_length + padding); 3381e48354ceSNicholas Bellinger 3382e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3383e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3384e48354ceSNicholas Bellinger 3385e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3386e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3387e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3388e48354ceSNicholas Bellinger 3389e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3390e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3391e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for" 3392e48354ceSNicholas Bellinger " Text Response PDU 0x%08x\n", *header_digest); 3393e48354ceSNicholas Bellinger } 3394e48354ceSNicholas Bellinger 3395e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3396e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3397e48354ceSNicholas Bellinger cmd->buf_ptr, (text_length + padding), 3398e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3399e48354ceSNicholas Bellinger 3400e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3401e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3402e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3403e48354ceSNicholas Bellinger 3404e48354ceSNicholas Bellinger pr_debug("Attaching DataDigest for %u bytes of text" 3405e48354ceSNicholas Bellinger " data, CRC 0x%08x\n", (text_length + padding), 3406e48354ceSNicholas Bellinger cmd->data_crc); 3407e48354ceSNicholas Bellinger } 3408e48354ceSNicholas Bellinger 3409e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3410e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3411e48354ceSNicholas Bellinger 3412e48354ceSNicholas Bellinger pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," 3413e48354ceSNicholas Bellinger " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, 3414e48354ceSNicholas Bellinger text_length, conn->cid); 3415e48354ceSNicholas Bellinger return 0; 3416e48354ceSNicholas Bellinger } 3417e48354ceSNicholas Bellinger 3418e48354ceSNicholas Bellinger static int iscsit_send_reject( 3419e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3420e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3421e48354ceSNicholas Bellinger { 3422e48354ceSNicholas Bellinger u32 iov_count = 0, tx_size = 0; 3423e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 3424e48354ceSNicholas Bellinger struct kvec *iov; 3425e48354ceSNicholas Bellinger 3426e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 3427e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_REJECT; 3428e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3429e48354ceSNicholas Bellinger hton24(hdr->dlength, ISCSI_HDR_LEN); 3430e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3431e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3432e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3433e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3434e48354ceSNicholas Bellinger 3435e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3436e48354ceSNicholas Bellinger 3437e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3438e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3439e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->buf_ptr; 3440e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3441e48354ceSNicholas Bellinger 3442e48354ceSNicholas Bellinger tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); 3443e48354ceSNicholas Bellinger 3444e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3445e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3446e48354ceSNicholas Bellinger 3447e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3448e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3449e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3450e48354ceSNicholas Bellinger 3451e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3452e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3453e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for" 3454e48354ceSNicholas Bellinger " REJECT PDU 0x%08x\n", *header_digest); 3455e48354ceSNicholas Bellinger } 3456e48354ceSNicholas Bellinger 3457e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3458e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3459e48354ceSNicholas Bellinger (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, 3460e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3461e48354ceSNicholas Bellinger 3462e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3463e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3464e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3465e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 DataDigest for REJECT" 3466e48354ceSNicholas Bellinger " PDU 0x%08x\n", cmd->data_crc); 3467e48354ceSNicholas Bellinger } 3468e48354ceSNicholas Bellinger 3469e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3470e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3471e48354ceSNicholas Bellinger 3472e48354ceSNicholas Bellinger pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," 3473e48354ceSNicholas Bellinger " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); 3474e48354ceSNicholas Bellinger 3475e48354ceSNicholas Bellinger return 0; 3476e48354ceSNicholas Bellinger } 3477e48354ceSNicholas Bellinger 3478e48354ceSNicholas Bellinger void iscsit_thread_get_cpumask(struct iscsi_conn *conn) 3479e48354ceSNicholas Bellinger { 3480e48354ceSNicholas Bellinger struct iscsi_thread_set *ts = conn->thread_set; 3481e48354ceSNicholas Bellinger int ord, cpu; 3482e48354ceSNicholas Bellinger /* 3483e48354ceSNicholas Bellinger * thread_id is assigned from iscsit_global->ts_bitmap from 3484e48354ceSNicholas Bellinger * within iscsi_thread_set.c:iscsi_allocate_thread_sets() 3485e48354ceSNicholas Bellinger * 3486e48354ceSNicholas Bellinger * Here we use thread_id to determine which CPU that this 3487e48354ceSNicholas Bellinger * iSCSI connection's iscsi_thread_set will be scheduled to 3488e48354ceSNicholas Bellinger * execute upon. 3489e48354ceSNicholas Bellinger */ 3490e48354ceSNicholas Bellinger ord = ts->thread_id % cpumask_weight(cpu_online_mask); 3491e48354ceSNicholas Bellinger for_each_online_cpu(cpu) { 3492e48354ceSNicholas Bellinger if (ord-- == 0) { 3493e48354ceSNicholas Bellinger cpumask_set_cpu(cpu, conn->conn_cpumask); 3494e48354ceSNicholas Bellinger return; 3495e48354ceSNicholas Bellinger } 3496e48354ceSNicholas Bellinger } 3497e48354ceSNicholas Bellinger /* 3498e48354ceSNicholas Bellinger * This should never be reached.. 3499e48354ceSNicholas Bellinger */ 3500e48354ceSNicholas Bellinger dump_stack(); 3501e48354ceSNicholas Bellinger cpumask_setall(conn->conn_cpumask); 3502e48354ceSNicholas Bellinger } 3503e48354ceSNicholas Bellinger 3504e48354ceSNicholas Bellinger static inline void iscsit_thread_check_cpumask( 3505e48354ceSNicholas Bellinger struct iscsi_conn *conn, 3506e48354ceSNicholas Bellinger struct task_struct *p, 3507e48354ceSNicholas Bellinger int mode) 3508e48354ceSNicholas Bellinger { 3509e48354ceSNicholas Bellinger char buf[128]; 3510e48354ceSNicholas Bellinger /* 3511e48354ceSNicholas Bellinger * mode == 1 signals iscsi_target_tx_thread() usage. 3512e48354ceSNicholas Bellinger * mode == 0 signals iscsi_target_rx_thread() usage. 3513e48354ceSNicholas Bellinger */ 3514e48354ceSNicholas Bellinger if (mode == 1) { 3515e48354ceSNicholas Bellinger if (!conn->conn_tx_reset_cpumask) 3516e48354ceSNicholas Bellinger return; 3517e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 0; 3518e48354ceSNicholas Bellinger } else { 3519e48354ceSNicholas Bellinger if (!conn->conn_rx_reset_cpumask) 3520e48354ceSNicholas Bellinger return; 3521e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 0; 3522e48354ceSNicholas Bellinger } 3523e48354ceSNicholas Bellinger /* 3524e48354ceSNicholas Bellinger * Update the CPU mask for this single kthread so that 3525e48354ceSNicholas Bellinger * both TX and RX kthreads are scheduled to run on the 3526e48354ceSNicholas Bellinger * same CPU. 3527e48354ceSNicholas Bellinger */ 3528e48354ceSNicholas Bellinger memset(buf, 0, 128); 3529e48354ceSNicholas Bellinger cpumask_scnprintf(buf, 128, conn->conn_cpumask); 3530e48354ceSNicholas Bellinger set_cpus_allowed_ptr(p, conn->conn_cpumask); 3531e48354ceSNicholas Bellinger } 3532e48354ceSNicholas Bellinger 35336f3c0e69SAndy Grover static int handle_immediate_queue(struct iscsi_conn *conn) 3534e48354ceSNicholas Bellinger { 35356f3c0e69SAndy Grover struct iscsi_queue_req *qr; 35366f3c0e69SAndy Grover struct iscsi_cmd *cmd; 3537e48354ceSNicholas Bellinger u8 state; 35386f3c0e69SAndy Grover int ret; 3539e48354ceSNicholas Bellinger 3540c6037cc5SAndy Grover while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { 3541e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 0); 3542e48354ceSNicholas Bellinger cmd = qr->cmd; 3543e48354ceSNicholas Bellinger state = qr->state; 3544e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 3545e48354ceSNicholas Bellinger 3546e48354ceSNicholas Bellinger switch (state) { 3547e48354ceSNicholas Bellinger case ISTATE_SEND_R2T: 3548e48354ceSNicholas Bellinger ret = iscsit_send_r2t(cmd, conn); 35496f3c0e69SAndy Grover if (ret < 0) 35506f3c0e69SAndy Grover goto err; 3551e48354ceSNicholas Bellinger break; 3552e48354ceSNicholas Bellinger case ISTATE_REMOVE: 3553e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 3554e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 3555e48354ceSNicholas Bellinger 3556e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 35572fbb471eSAndy Grover list_del(&cmd->i_conn_node); 3558e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3559d270190aSNicholas Bellinger 3560d270190aSNicholas Bellinger iscsit_free_cmd(cmd); 3561c6037cc5SAndy Grover continue; 3562e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN_WANT_RESPONSE: 3563e48354ceSNicholas Bellinger iscsit_mod_nopin_response_timer(conn); 3564e48354ceSNicholas Bellinger ret = iscsit_send_unsolicited_nopin(cmd, 3565e48354ceSNicholas Bellinger conn, 1); 35666f3c0e69SAndy Grover if (ret < 0) 35676f3c0e69SAndy Grover goto err; 3568e48354ceSNicholas Bellinger break; 3569e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN_NO_RESPONSE: 3570e48354ceSNicholas Bellinger ret = iscsit_send_unsolicited_nopin(cmd, 3571e48354ceSNicholas Bellinger conn, 0); 35726f3c0e69SAndy Grover if (ret < 0) 35736f3c0e69SAndy Grover goto err; 3574e48354ceSNicholas Bellinger break; 3575e48354ceSNicholas Bellinger default: 3576e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3577e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3578e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, state, 3579e48354ceSNicholas Bellinger conn->cid); 35806f3c0e69SAndy Grover goto err; 3581e48354ceSNicholas Bellinger } 3582e48354ceSNicholas Bellinger } 3583e48354ceSNicholas Bellinger 35846f3c0e69SAndy Grover return 0; 35856f3c0e69SAndy Grover 35866f3c0e69SAndy Grover err: 35876f3c0e69SAndy Grover return -1; 3588e48354ceSNicholas Bellinger } 35896f3c0e69SAndy Grover 35906f3c0e69SAndy Grover static int handle_response_queue(struct iscsi_conn *conn) 35916f3c0e69SAndy Grover { 35926f3c0e69SAndy Grover struct iscsi_queue_req *qr; 35936f3c0e69SAndy Grover struct iscsi_cmd *cmd; 35946f3c0e69SAndy Grover u8 state; 35956f3c0e69SAndy Grover int ret; 3596e48354ceSNicholas Bellinger 3597c6037cc5SAndy Grover while ((qr = iscsit_get_cmd_from_response_queue(conn))) { 3598e48354ceSNicholas Bellinger cmd = qr->cmd; 3599e48354ceSNicholas Bellinger state = qr->state; 3600e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 3601e48354ceSNicholas Bellinger 3602e48354ceSNicholas Bellinger check_rsp_state: 3603e48354ceSNicholas Bellinger switch (state) { 3604e48354ceSNicholas Bellinger case ISTATE_SEND_DATAIN: 36056f3c0e69SAndy Grover ret = iscsit_send_data_in(cmd, conn); 36066f3c0e69SAndy Grover if (ret < 0) 36076f3c0e69SAndy Grover goto err; 36086f3c0e69SAndy Grover else if (!ret) 36096f3c0e69SAndy Grover /* more drs */ 36106f3c0e69SAndy Grover goto check_rsp_state; 36116f3c0e69SAndy Grover else if (ret == 1) { 36126f3c0e69SAndy Grover /* all done */ 36136f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36146f3c0e69SAndy Grover cmd->i_state = ISTATE_SENT_STATUS; 3615e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 36166f3c0e69SAndy Grover continue; 36176f3c0e69SAndy Grover } else if (ret == 2) { 36186f3c0e69SAndy Grover /* Still must send status, 36196f3c0e69SAndy Grover SCF_TRANSPORT_TASK_SENSE was set */ 36206f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36216f3c0e69SAndy Grover cmd->i_state = ISTATE_SEND_STATUS; 36226f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 36236f3c0e69SAndy Grover state = ISTATE_SEND_STATUS; 36246f3c0e69SAndy Grover goto check_rsp_state; 36256f3c0e69SAndy Grover } 36266f3c0e69SAndy Grover 3627e48354ceSNicholas Bellinger break; 3628e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS: 3629e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS_RECOVERY: 3630e48354ceSNicholas Bellinger ret = iscsit_send_status(cmd, conn); 3631e48354ceSNicholas Bellinger break; 3632e48354ceSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 3633e48354ceSNicholas Bellinger ret = iscsit_send_logout_response(cmd, conn); 3634e48354ceSNicholas Bellinger break; 3635e48354ceSNicholas Bellinger case ISTATE_SEND_ASYNCMSG: 3636e48354ceSNicholas Bellinger ret = iscsit_send_conn_drop_async_message( 3637e48354ceSNicholas Bellinger cmd, conn); 3638e48354ceSNicholas Bellinger break; 3639e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN: 3640e48354ceSNicholas Bellinger ret = iscsit_send_nopin_response(cmd, conn); 3641e48354ceSNicholas Bellinger break; 3642e48354ceSNicholas Bellinger case ISTATE_SEND_REJECT: 3643e48354ceSNicholas Bellinger ret = iscsit_send_reject(cmd, conn); 3644e48354ceSNicholas Bellinger break; 3645e48354ceSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 3646e48354ceSNicholas Bellinger ret = iscsit_send_task_mgt_rsp(cmd, conn); 3647e48354ceSNicholas Bellinger if (ret != 0) 3648e48354ceSNicholas Bellinger break; 3649e48354ceSNicholas Bellinger ret = iscsit_tmr_post_handler(cmd, conn); 3650e48354ceSNicholas Bellinger if (ret != 0) 3651e48354ceSNicholas Bellinger iscsit_fall_back_to_erl0(conn->sess); 3652e48354ceSNicholas Bellinger break; 3653e48354ceSNicholas Bellinger case ISTATE_SEND_TEXTRSP: 3654e48354ceSNicholas Bellinger ret = iscsit_send_text_rsp(cmd, conn); 3655e48354ceSNicholas Bellinger break; 3656e48354ceSNicholas Bellinger default: 3657e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3658e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3659e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, 3660e48354ceSNicholas Bellinger state, conn->cid); 36616f3c0e69SAndy Grover goto err; 3662e48354ceSNicholas Bellinger } 3663c6037cc5SAndy Grover if (ret < 0) 36646f3c0e69SAndy Grover goto err; 3665e48354ceSNicholas Bellinger 36666f3c0e69SAndy Grover if (iscsit_send_tx_data(cmd, conn, 1) < 0) { 3667e48354ceSNicholas Bellinger iscsit_tx_thread_wait_for_tcp(conn); 3668e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 36696f3c0e69SAndy Grover goto err; 3670e48354ceSNicholas Bellinger } 3671e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 3672e48354ceSNicholas Bellinger 3673e48354ceSNicholas Bellinger switch (state) { 36746f3c0e69SAndy Grover case ISTATE_SEND_LOGOUTRSP: 36756f3c0e69SAndy Grover if (!iscsit_logout_post_handler(cmd, conn)) 36766f3c0e69SAndy Grover goto restart; 36776f3c0e69SAndy Grover /* fall through */ 3678e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS: 3679e48354ceSNicholas Bellinger case ISTATE_SEND_ASYNCMSG: 3680e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN: 3681e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS_RECOVERY: 3682e48354ceSNicholas Bellinger case ISTATE_SEND_TEXTRSP: 36836f3c0e69SAndy Grover case ISTATE_SEND_TASKMGTRSP: 36846f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36856f3c0e69SAndy Grover cmd->i_state = ISTATE_SENT_STATUS; 36866f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 3687e48354ceSNicholas Bellinger break; 3688e48354ceSNicholas Bellinger case ISTATE_SEND_REJECT: 3689e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { 3690e48354ceSNicholas Bellinger cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; 3691e48354ceSNicholas Bellinger complete(&cmd->reject_comp); 36926f3c0e69SAndy Grover goto err; 3693e48354ceSNicholas Bellinger } 3694e48354ceSNicholas Bellinger complete(&cmd->reject_comp); 3695e48354ceSNicholas Bellinger break; 3696e48354ceSNicholas Bellinger default: 3697e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3698e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3699e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, 3700e48354ceSNicholas Bellinger cmd->i_state, conn->cid); 37016f3c0e69SAndy Grover goto err; 3702e48354ceSNicholas Bellinger } 3703e48354ceSNicholas Bellinger 3704e48354ceSNicholas Bellinger if (atomic_read(&conn->check_immediate_queue)) 3705c6037cc5SAndy Grover break; 3706c6037cc5SAndy Grover } 37076f3c0e69SAndy Grover 37086f3c0e69SAndy Grover return 0; 37096f3c0e69SAndy Grover 37106f3c0e69SAndy Grover err: 37116f3c0e69SAndy Grover return -1; 37126f3c0e69SAndy Grover restart: 37136f3c0e69SAndy Grover return -EAGAIN; 37146f3c0e69SAndy Grover } 37156f3c0e69SAndy Grover 37166f3c0e69SAndy Grover int iscsi_target_tx_thread(void *arg) 37176f3c0e69SAndy Grover { 37186f3c0e69SAndy Grover int ret = 0; 37196f3c0e69SAndy Grover struct iscsi_conn *conn; 37206f3c0e69SAndy Grover struct iscsi_thread_set *ts = arg; 37216f3c0e69SAndy Grover /* 37226f3c0e69SAndy Grover * Allow ourselves to be interrupted by SIGINT so that a 37236f3c0e69SAndy Grover * connection recovery / failure event can be triggered externally. 37246f3c0e69SAndy Grover */ 37256f3c0e69SAndy Grover allow_signal(SIGINT); 37266f3c0e69SAndy Grover 37276f3c0e69SAndy Grover restart: 37286f3c0e69SAndy Grover conn = iscsi_tx_thread_pre_handler(ts); 37296f3c0e69SAndy Grover if (!conn) 37306f3c0e69SAndy Grover goto out; 37316f3c0e69SAndy Grover 37326f3c0e69SAndy Grover ret = 0; 37336f3c0e69SAndy Grover 37346f3c0e69SAndy Grover while (!kthread_should_stop()) { 37356f3c0e69SAndy Grover /* 37366f3c0e69SAndy Grover * Ensure that both TX and RX per connection kthreads 37376f3c0e69SAndy Grover * are scheduled to run on the same CPU. 37386f3c0e69SAndy Grover */ 37396f3c0e69SAndy Grover iscsit_thread_check_cpumask(conn, current, 1); 37406f3c0e69SAndy Grover 37416f3c0e69SAndy Grover schedule_timeout_interruptible(MAX_SCHEDULE_TIMEOUT); 37426f3c0e69SAndy Grover 37436f3c0e69SAndy Grover if ((ts->status == ISCSI_THREAD_SET_RESET) || 37446f3c0e69SAndy Grover signal_pending(current)) 37456f3c0e69SAndy Grover goto transport_err; 37466f3c0e69SAndy Grover 37476f3c0e69SAndy Grover ret = handle_immediate_queue(conn); 37486f3c0e69SAndy Grover if (ret < 0) 37496f3c0e69SAndy Grover goto transport_err; 37506f3c0e69SAndy Grover 37516f3c0e69SAndy Grover ret = handle_response_queue(conn); 37526f3c0e69SAndy Grover if (ret == -EAGAIN) 37536f3c0e69SAndy Grover goto restart; 37546f3c0e69SAndy Grover else if (ret < 0) 37556f3c0e69SAndy Grover goto transport_err; 3756e48354ceSNicholas Bellinger } 3757e48354ceSNicholas Bellinger 3758e48354ceSNicholas Bellinger transport_err: 3759e48354ceSNicholas Bellinger iscsit_take_action_for_connection_exit(conn); 3760e48354ceSNicholas Bellinger goto restart; 3761e48354ceSNicholas Bellinger out: 3762e48354ceSNicholas Bellinger return 0; 3763e48354ceSNicholas Bellinger } 3764e48354ceSNicholas Bellinger 3765e48354ceSNicholas Bellinger int iscsi_target_rx_thread(void *arg) 3766e48354ceSNicholas Bellinger { 3767e48354ceSNicholas Bellinger int ret; 3768e48354ceSNicholas Bellinger u8 buffer[ISCSI_HDR_LEN], opcode; 3769e48354ceSNicholas Bellinger u32 checksum = 0, digest = 0; 3770e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 37718359cf43SJörn Engel struct iscsi_thread_set *ts = arg; 3772e48354ceSNicholas Bellinger struct kvec iov; 3773e48354ceSNicholas Bellinger /* 3774e48354ceSNicholas Bellinger * Allow ourselves to be interrupted by SIGINT so that a 3775e48354ceSNicholas Bellinger * connection recovery / failure event can be triggered externally. 3776e48354ceSNicholas Bellinger */ 3777e48354ceSNicholas Bellinger allow_signal(SIGINT); 3778e48354ceSNicholas Bellinger 3779e48354ceSNicholas Bellinger restart: 3780e48354ceSNicholas Bellinger conn = iscsi_rx_thread_pre_handler(ts); 3781e48354ceSNicholas Bellinger if (!conn) 3782e48354ceSNicholas Bellinger goto out; 3783e48354ceSNicholas Bellinger 3784e48354ceSNicholas Bellinger while (!kthread_should_stop()) { 3785e48354ceSNicholas Bellinger /* 3786e48354ceSNicholas Bellinger * Ensure that both TX and RX per connection kthreads 3787e48354ceSNicholas Bellinger * are scheduled to run on the same CPU. 3788e48354ceSNicholas Bellinger */ 3789e48354ceSNicholas Bellinger iscsit_thread_check_cpumask(conn, current, 0); 3790e48354ceSNicholas Bellinger 3791e48354ceSNicholas Bellinger memset(buffer, 0, ISCSI_HDR_LEN); 3792e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 3793e48354ceSNicholas Bellinger 3794e48354ceSNicholas Bellinger iov.iov_base = buffer; 3795e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 3796e48354ceSNicholas Bellinger 3797e48354ceSNicholas Bellinger ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); 3798e48354ceSNicholas Bellinger if (ret != ISCSI_HDR_LEN) { 3799e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 3800e48354ceSNicholas Bellinger goto transport_err; 3801e48354ceSNicholas Bellinger } 3802e48354ceSNicholas Bellinger 3803e48354ceSNicholas Bellinger /* 3804e48354ceSNicholas Bellinger * Set conn->bad_hdr for use with REJECT PDUs. 3805e48354ceSNicholas Bellinger */ 3806e48354ceSNicholas Bellinger memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); 3807e48354ceSNicholas Bellinger 3808e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3809e48354ceSNicholas Bellinger iov.iov_base = &digest; 3810e48354ceSNicholas Bellinger iov.iov_len = ISCSI_CRC_LEN; 3811e48354ceSNicholas Bellinger 3812e48354ceSNicholas Bellinger ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); 3813e48354ceSNicholas Bellinger if (ret != ISCSI_CRC_LEN) { 3814e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 3815e48354ceSNicholas Bellinger goto transport_err; 3816e48354ceSNicholas Bellinger } 3817e48354ceSNicholas Bellinger 3818e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 3819e48354ceSNicholas Bellinger buffer, ISCSI_HDR_LEN, 3820e48354ceSNicholas Bellinger 0, NULL, (u8 *)&checksum); 3821e48354ceSNicholas Bellinger 3822e48354ceSNicholas Bellinger if (digest != checksum) { 3823e48354ceSNicholas Bellinger pr_err("HeaderDigest CRC32C failed," 3824e48354ceSNicholas Bellinger " received 0x%08x, computed 0x%08x\n", 3825e48354ceSNicholas Bellinger digest, checksum); 3826e48354ceSNicholas Bellinger /* 3827e48354ceSNicholas Bellinger * Set the PDU to 0xff so it will intentionally 3828e48354ceSNicholas Bellinger * hit default in the switch below. 3829e48354ceSNicholas Bellinger */ 3830e48354ceSNicholas Bellinger memset(buffer, 0xff, ISCSI_HDR_LEN); 3831e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 3832e48354ceSNicholas Bellinger conn->sess->conn_digest_errors++; 3833e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 3834e48354ceSNicholas Bellinger } else { 3835e48354ceSNicholas Bellinger pr_debug("Got HeaderDigest CRC32C" 3836e48354ceSNicholas Bellinger " 0x%08x\n", checksum); 3837e48354ceSNicholas Bellinger } 3838e48354ceSNicholas Bellinger } 3839e48354ceSNicholas Bellinger 3840e48354ceSNicholas Bellinger if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) 3841e48354ceSNicholas Bellinger goto transport_err; 3842e48354ceSNicholas Bellinger 3843e48354ceSNicholas Bellinger opcode = buffer[0] & ISCSI_OPCODE_MASK; 3844e48354ceSNicholas Bellinger 3845e48354ceSNicholas Bellinger if (conn->sess->sess_ops->SessionType && 3846e48354ceSNicholas Bellinger ((!(opcode & ISCSI_OP_TEXT)) || 3847e48354ceSNicholas Bellinger (!(opcode & ISCSI_OP_LOGOUT)))) { 3848e48354ceSNicholas Bellinger pr_err("Received illegal iSCSI Opcode: 0x%02x" 3849e48354ceSNicholas Bellinger " while in Discovery Session, rejecting.\n", opcode); 3850e48354ceSNicholas Bellinger iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 3851e48354ceSNicholas Bellinger buffer, conn); 3852e48354ceSNicholas Bellinger goto transport_err; 3853e48354ceSNicholas Bellinger } 3854e48354ceSNicholas Bellinger 3855e48354ceSNicholas Bellinger switch (opcode) { 3856e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 3857e48354ceSNicholas Bellinger if (iscsit_handle_scsi_cmd(conn, buffer) < 0) 3858e48354ceSNicholas Bellinger goto transport_err; 3859e48354ceSNicholas Bellinger break; 3860e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_DATA_OUT: 3861e48354ceSNicholas Bellinger if (iscsit_handle_data_out(conn, buffer) < 0) 3862e48354ceSNicholas Bellinger goto transport_err; 3863e48354ceSNicholas Bellinger break; 3864e48354ceSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 3865e48354ceSNicholas Bellinger if (iscsit_handle_nop_out(conn, buffer) < 0) 3866e48354ceSNicholas Bellinger goto transport_err; 3867e48354ceSNicholas Bellinger break; 3868e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 3869e48354ceSNicholas Bellinger if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0) 3870e48354ceSNicholas Bellinger goto transport_err; 3871e48354ceSNicholas Bellinger break; 3872e48354ceSNicholas Bellinger case ISCSI_OP_TEXT: 3873e48354ceSNicholas Bellinger if (iscsit_handle_text_cmd(conn, buffer) < 0) 3874e48354ceSNicholas Bellinger goto transport_err; 3875e48354ceSNicholas Bellinger break; 3876e48354ceSNicholas Bellinger case ISCSI_OP_LOGOUT: 3877e48354ceSNicholas Bellinger ret = iscsit_handle_logout_cmd(conn, buffer); 3878e48354ceSNicholas Bellinger if (ret > 0) { 3879e48354ceSNicholas Bellinger wait_for_completion_timeout(&conn->conn_logout_comp, 3880e48354ceSNicholas Bellinger SECONDS_FOR_LOGOUT_COMP * HZ); 3881e48354ceSNicholas Bellinger goto transport_err; 3882e48354ceSNicholas Bellinger } else if (ret < 0) 3883e48354ceSNicholas Bellinger goto transport_err; 3884e48354ceSNicholas Bellinger break; 3885e48354ceSNicholas Bellinger case ISCSI_OP_SNACK: 3886e48354ceSNicholas Bellinger if (iscsit_handle_snack(conn, buffer) < 0) 3887e48354ceSNicholas Bellinger goto transport_err; 3888e48354ceSNicholas Bellinger break; 3889e48354ceSNicholas Bellinger default: 3890e48354ceSNicholas Bellinger pr_err("Got unknown iSCSI OpCode: 0x%02x\n", 3891e48354ceSNicholas Bellinger opcode); 3892e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 3893e48354ceSNicholas Bellinger pr_err("Cannot recover from unknown" 3894e48354ceSNicholas Bellinger " opcode while ERL=0, closing iSCSI connection" 3895e48354ceSNicholas Bellinger ".\n"); 3896e48354ceSNicholas Bellinger goto transport_err; 3897e48354ceSNicholas Bellinger } 3898e48354ceSNicholas Bellinger if (!conn->conn_ops->OFMarker) { 3899e48354ceSNicholas Bellinger pr_err("Unable to recover from unknown" 3900e48354ceSNicholas Bellinger " opcode while OFMarker=No, closing iSCSI" 3901e48354ceSNicholas Bellinger " connection.\n"); 3902e48354ceSNicholas Bellinger goto transport_err; 3903e48354ceSNicholas Bellinger } 3904e48354ceSNicholas Bellinger if (iscsit_recover_from_unknown_opcode(conn) < 0) { 3905e48354ceSNicholas Bellinger pr_err("Unable to recover from unknown" 3906e48354ceSNicholas Bellinger " opcode, closing iSCSI connection.\n"); 3907e48354ceSNicholas Bellinger goto transport_err; 3908e48354ceSNicholas Bellinger } 3909e48354ceSNicholas Bellinger break; 3910e48354ceSNicholas Bellinger } 3911e48354ceSNicholas Bellinger } 3912e48354ceSNicholas Bellinger 3913e48354ceSNicholas Bellinger transport_err: 3914e48354ceSNicholas Bellinger if (!signal_pending(current)) 3915e48354ceSNicholas Bellinger atomic_set(&conn->transport_failed, 1); 3916e48354ceSNicholas Bellinger iscsit_take_action_for_connection_exit(conn); 3917e48354ceSNicholas Bellinger goto restart; 3918e48354ceSNicholas Bellinger out: 3919e48354ceSNicholas Bellinger return 0; 3920e48354ceSNicholas Bellinger } 3921e48354ceSNicholas Bellinger 3922e48354ceSNicholas Bellinger static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) 3923e48354ceSNicholas Bellinger { 3924e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; 3925e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 3926e48354ceSNicholas Bellinger /* 3927e48354ceSNicholas Bellinger * We expect this function to only ever be called from either RX or TX 3928e48354ceSNicholas Bellinger * thread context via iscsit_close_connection() once the other context 3929e48354ceSNicholas Bellinger * has been reset -> returned sleeping pre-handler state. 3930e48354ceSNicholas Bellinger */ 3931e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 39322fbb471eSAndy Grover list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { 3933e48354ceSNicholas Bellinger 39342fbb471eSAndy Grover list_del(&cmd->i_conn_node); 3935e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3936e48354ceSNicholas Bellinger 3937e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, sess); 3938e48354ceSNicholas Bellinger 3939d270190aSNicholas Bellinger iscsit_free_cmd(cmd); 3940e48354ceSNicholas Bellinger 3941e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3942e48354ceSNicholas Bellinger } 3943e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3944e48354ceSNicholas Bellinger } 3945e48354ceSNicholas Bellinger 3946e48354ceSNicholas Bellinger static void iscsit_stop_timers_for_cmds( 3947e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3948e48354ceSNicholas Bellinger { 3949e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 3950e48354ceSNicholas Bellinger 3951e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 39522fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 3953e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 3954e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 3955e48354ceSNicholas Bellinger } 3956e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3957e48354ceSNicholas Bellinger } 3958e48354ceSNicholas Bellinger 3959e48354ceSNicholas Bellinger int iscsit_close_connection( 3960e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3961e48354ceSNicholas Bellinger { 3962e48354ceSNicholas Bellinger int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); 3963e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 3964e48354ceSNicholas Bellinger 3965e48354ceSNicholas Bellinger pr_debug("Closing iSCSI connection CID %hu on SID:" 3966e48354ceSNicholas Bellinger " %u\n", conn->cid, sess->sid); 3967e48354ceSNicholas Bellinger /* 3968e48354ceSNicholas Bellinger * Always up conn_logout_comp just in case the RX Thread is sleeping 3969e48354ceSNicholas Bellinger * and the logout response never got sent because the connection 3970e48354ceSNicholas Bellinger * failed. 3971e48354ceSNicholas Bellinger */ 3972e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 3973e48354ceSNicholas Bellinger 3974e48354ceSNicholas Bellinger iscsi_release_thread_set(conn); 3975e48354ceSNicholas Bellinger 3976e48354ceSNicholas Bellinger iscsit_stop_timers_for_cmds(conn); 3977e48354ceSNicholas Bellinger iscsit_stop_nopin_response_timer(conn); 3978e48354ceSNicholas Bellinger iscsit_stop_nopin_timer(conn); 3979e48354ceSNicholas Bellinger iscsit_free_queue_reqs_for_conn(conn); 3980e48354ceSNicholas Bellinger 3981e48354ceSNicholas Bellinger /* 3982e48354ceSNicholas Bellinger * During Connection recovery drop unacknowledged out of order 3983e48354ceSNicholas Bellinger * commands for this connection, and prepare the other commands 3984e48354ceSNicholas Bellinger * for realligence. 3985e48354ceSNicholas Bellinger * 3986e48354ceSNicholas Bellinger * During normal operation clear the out of order commands (but 3987e48354ceSNicholas Bellinger * do not free the struct iscsi_ooo_cmdsn's) and release all 3988e48354ceSNicholas Bellinger * struct iscsi_cmds. 3989e48354ceSNicholas Bellinger */ 3990e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_recovery)) { 3991e48354ceSNicholas Bellinger iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); 3992e48354ceSNicholas Bellinger iscsit_prepare_cmds_for_realligance(conn); 3993e48354ceSNicholas Bellinger } else { 3994e48354ceSNicholas Bellinger iscsit_clear_ooo_cmdsns_for_conn(conn); 3995e48354ceSNicholas Bellinger iscsit_release_commands_from_conn(conn); 3996e48354ceSNicholas Bellinger } 3997e48354ceSNicholas Bellinger 3998e48354ceSNicholas Bellinger /* 3999e48354ceSNicholas Bellinger * Handle decrementing session or connection usage count if 4000e48354ceSNicholas Bellinger * a logout response was not able to be sent because the 4001e48354ceSNicholas Bellinger * connection failed. Fall back to Session Recovery here. 4002e48354ceSNicholas Bellinger */ 4003e48354ceSNicholas Bellinger if (atomic_read(&conn->conn_logout_remove)) { 4004e48354ceSNicholas Bellinger if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { 4005e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4006e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 4007e48354ceSNicholas Bellinger } 4008e48354ceSNicholas Bellinger if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) 4009e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4010e48354ceSNicholas Bellinger 4011e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4012e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 0); 4013e48354ceSNicholas Bellinger atomic_set(&sess->session_fall_back_to_erl0, 1); 4014e48354ceSNicholas Bellinger } 4015e48354ceSNicholas Bellinger 4016e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4017e48354ceSNicholas Bellinger list_del(&conn->conn_list); 4018e48354ceSNicholas Bellinger 4019e48354ceSNicholas Bellinger /* 4020e48354ceSNicholas Bellinger * Attempt to let the Initiator know this connection failed by 4021e48354ceSNicholas Bellinger * sending an Connection Dropped Async Message on another 4022e48354ceSNicholas Bellinger * active connection. 4023e48354ceSNicholas Bellinger */ 4024e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_recovery)) 4025e48354ceSNicholas Bellinger iscsit_build_conn_drop_async_message(conn); 4026e48354ceSNicholas Bellinger 4027e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4028e48354ceSNicholas Bellinger 4029e48354ceSNicholas Bellinger /* 4030e48354ceSNicholas Bellinger * If connection reinstatement is being performed on this connection, 4031e48354ceSNicholas Bellinger * up the connection reinstatement semaphore that is being blocked on 4032e48354ceSNicholas Bellinger * in iscsit_cause_connection_reinstatement(). 4033e48354ceSNicholas Bellinger */ 4034e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4035e48354ceSNicholas Bellinger if (atomic_read(&conn->sleep_on_conn_wait_comp)) { 4036e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4037e48354ceSNicholas Bellinger complete(&conn->conn_wait_comp); 4038e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_post_wait_comp); 4039e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4040e48354ceSNicholas Bellinger } 4041e48354ceSNicholas Bellinger 4042e48354ceSNicholas Bellinger /* 4043e48354ceSNicholas Bellinger * If connection reinstatement is being performed on this connection 4044e48354ceSNicholas Bellinger * by receiving a REMOVECONNFORRECOVERY logout request, up the 4045e48354ceSNicholas Bellinger * connection wait rcfr semaphore that is being blocked on 4046e48354ceSNicholas Bellinger * an iscsit_connection_reinstatement_rcfr(). 4047e48354ceSNicholas Bellinger */ 4048e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_wait_rcfr)) { 4049e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4050e48354ceSNicholas Bellinger complete(&conn->conn_wait_rcfr_comp); 4051e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_post_wait_comp); 4052e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4053e48354ceSNicholas Bellinger } 4054e48354ceSNicholas Bellinger atomic_set(&conn->connection_reinstatement, 1); 4055e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4056e48354ceSNicholas Bellinger 4057e48354ceSNicholas Bellinger /* 4058e48354ceSNicholas Bellinger * If any other processes are accessing this connection pointer we 4059e48354ceSNicholas Bellinger * must wait until they have completed. 4060e48354ceSNicholas Bellinger */ 4061e48354ceSNicholas Bellinger iscsit_check_conn_usage_count(conn); 4062e48354ceSNicholas Bellinger 4063e48354ceSNicholas Bellinger if (conn->conn_rx_hash.tfm) 4064e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 4065e48354ceSNicholas Bellinger if (conn->conn_tx_hash.tfm) 4066e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_tx_hash.tfm); 4067e48354ceSNicholas Bellinger 4068e48354ceSNicholas Bellinger if (conn->conn_cpumask) 4069e48354ceSNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 4070e48354ceSNicholas Bellinger 4071e48354ceSNicholas Bellinger kfree(conn->conn_ops); 4072e48354ceSNicholas Bellinger conn->conn_ops = NULL; 4073e48354ceSNicholas Bellinger 4074bf6932f4SAl Viro if (conn->sock) 4075e48354ceSNicholas Bellinger sock_release(conn->sock); 4076e48354ceSNicholas Bellinger conn->thread_set = NULL; 4077e48354ceSNicholas Bellinger 4078e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 4079e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 4080e48354ceSNicholas Bellinger kfree(conn); 4081e48354ceSNicholas Bellinger 4082e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4083e48354ceSNicholas Bellinger atomic_dec(&sess->nconn); 4084e48354ceSNicholas Bellinger pr_debug("Decremented iSCSI connection count to %hu from node:" 4085e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 4086e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4087e48354ceSNicholas Bellinger /* 4088e48354ceSNicholas Bellinger * Make sure that if one connection fails in an non ERL=2 iSCSI 4089e48354ceSNicholas Bellinger * Session that they all fail. 4090e48354ceSNicholas Bellinger */ 4091e48354ceSNicholas Bellinger if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && 4092e48354ceSNicholas Bellinger !atomic_read(&sess->session_logout)) 4093e48354ceSNicholas Bellinger atomic_set(&sess->session_fall_back_to_erl0, 1); 4094e48354ceSNicholas Bellinger 4095e48354ceSNicholas Bellinger /* 4096e48354ceSNicholas Bellinger * If this was not the last connection in the session, and we are 4097e48354ceSNicholas Bellinger * performing session reinstatement or falling back to ERL=0, call 4098e48354ceSNicholas Bellinger * iscsit_stop_session() without sleeping to shutdown the other 4099e48354ceSNicholas Bellinger * active connections. 4100e48354ceSNicholas Bellinger */ 4101e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4102e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_reinstatement) && 4103e48354ceSNicholas Bellinger !atomic_read(&sess->session_fall_back_to_erl0)) { 4104e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4105e48354ceSNicholas Bellinger return 0; 4106e48354ceSNicholas Bellinger } 4107e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_stop_active)) { 4108e48354ceSNicholas Bellinger atomic_set(&sess->session_stop_active, 1); 4109e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4110e48354ceSNicholas Bellinger iscsit_stop_session(sess, 0, 0); 4111e48354ceSNicholas Bellinger return 0; 4112e48354ceSNicholas Bellinger } 4113e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4114e48354ceSNicholas Bellinger return 0; 4115e48354ceSNicholas Bellinger } 4116e48354ceSNicholas Bellinger 4117e48354ceSNicholas Bellinger /* 4118e48354ceSNicholas Bellinger * If this was the last connection in the session and one of the 4119e48354ceSNicholas Bellinger * following is occurring: 4120e48354ceSNicholas Bellinger * 4121e48354ceSNicholas Bellinger * Session Reinstatement is not being performed, and are falling back 4122e48354ceSNicholas Bellinger * to ERL=0 call iscsit_close_session(). 4123e48354ceSNicholas Bellinger * 4124e48354ceSNicholas Bellinger * Session Logout was requested. iscsit_close_session() will be called 4125e48354ceSNicholas Bellinger * elsewhere. 4126e48354ceSNicholas Bellinger * 4127e48354ceSNicholas Bellinger * Session Continuation is not being performed, start the Time2Retain 4128e48354ceSNicholas Bellinger * handler and check if sleep_on_sess_wait_sem is active. 4129e48354ceSNicholas Bellinger */ 4130e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_reinstatement) && 4131e48354ceSNicholas Bellinger atomic_read(&sess->session_fall_back_to_erl0)) { 4132e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 413399367f01SNicholas Bellinger target_put_session(sess->se_sess); 4134e48354ceSNicholas Bellinger 4135e48354ceSNicholas Bellinger return 0; 4136e48354ceSNicholas Bellinger } else if (atomic_read(&sess->session_logout)) { 4137e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); 4138e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FREE; 4139e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4140e48354ceSNicholas Bellinger 4141e48354ceSNicholas Bellinger if (atomic_read(&sess->sleep_on_sess_wait_comp)) 4142e48354ceSNicholas Bellinger complete(&sess->session_wait_comp); 4143e48354ceSNicholas Bellinger 4144e48354ceSNicholas Bellinger return 0; 4145e48354ceSNicholas Bellinger } else { 4146e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); 4147e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FAILED; 4148e48354ceSNicholas Bellinger 4149e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_continuation)) { 4150e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4151e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(sess); 4152e48354ceSNicholas Bellinger } else 4153e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4154e48354ceSNicholas Bellinger 4155e48354ceSNicholas Bellinger if (atomic_read(&sess->sleep_on_sess_wait_comp)) 4156e48354ceSNicholas Bellinger complete(&sess->session_wait_comp); 4157e48354ceSNicholas Bellinger 4158e48354ceSNicholas Bellinger return 0; 4159e48354ceSNicholas Bellinger } 4160e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4161e48354ceSNicholas Bellinger 4162e48354ceSNicholas Bellinger return 0; 4163e48354ceSNicholas Bellinger } 4164e48354ceSNicholas Bellinger 4165e48354ceSNicholas Bellinger int iscsit_close_session(struct iscsi_session *sess) 4166e48354ceSNicholas Bellinger { 4167e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); 4168e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 4169e48354ceSNicholas Bellinger 4170e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4171e48354ceSNicholas Bellinger pr_err("%d connection(s) still exist for iSCSI session" 4172e48354ceSNicholas Bellinger " to %s\n", atomic_read(&sess->nconn), 4173e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4174e48354ceSNicholas Bellinger BUG(); 4175e48354ceSNicholas Bellinger } 4176e48354ceSNicholas Bellinger 4177e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4178e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 1); 4179e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 1); 4180e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 4181e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4182e48354ceSNicholas Bellinger 4183e48354ceSNicholas Bellinger /* 4184e48354ceSNicholas Bellinger * transport_deregister_session_configfs() will clear the 4185e48354ceSNicholas Bellinger * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context 4186e48354ceSNicholas Bellinger * can be setting it again with __transport_register_session() in 4187e48354ceSNicholas Bellinger * iscsi_post_login_handler() again after the iscsit_stop_session() 4188e48354ceSNicholas Bellinger * completes in iscsi_np context. 4189e48354ceSNicholas Bellinger */ 4190e48354ceSNicholas Bellinger transport_deregister_session_configfs(sess->se_sess); 4191e48354ceSNicholas Bellinger 4192e48354ceSNicholas Bellinger /* 4193e48354ceSNicholas Bellinger * If any other processes are accessing this session pointer we must 4194e48354ceSNicholas Bellinger * wait until they have completed. If we are in an interrupt (the 4195e48354ceSNicholas Bellinger * time2retain handler) and contain and active session usage count we 4196e48354ceSNicholas Bellinger * restart the timer and exit. 4197e48354ceSNicholas Bellinger */ 4198e48354ceSNicholas Bellinger if (!in_interrupt()) { 4199e48354ceSNicholas Bellinger if (iscsit_check_session_usage_count(sess) == 1) 4200e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 4201e48354ceSNicholas Bellinger } else { 4202e48354ceSNicholas Bellinger if (iscsit_check_session_usage_count(sess) == 2) { 4203e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 0); 4204e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(sess); 4205e48354ceSNicholas Bellinger return 0; 4206e48354ceSNicholas Bellinger } 4207e48354ceSNicholas Bellinger } 4208e48354ceSNicholas Bellinger 4209e48354ceSNicholas Bellinger transport_deregister_session(sess->se_sess); 4210e48354ceSNicholas Bellinger 4211e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) 4212e48354ceSNicholas Bellinger iscsit_free_connection_recovery_entires(sess); 4213e48354ceSNicholas Bellinger 4214e48354ceSNicholas Bellinger iscsit_free_all_ooo_cmdsns(sess); 4215e48354ceSNicholas Bellinger 4216e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4217e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); 4218e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FREE; 4219e48354ceSNicholas Bellinger pr_debug("Released iSCSI session from node: %s\n", 4220e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4221e48354ceSNicholas Bellinger tpg->nsessions--; 4222e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 4223e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions--; 4224e48354ceSNicholas Bellinger 4225e48354ceSNicholas Bellinger pr_debug("Decremented number of active iSCSI Sessions on" 4226e48354ceSNicholas Bellinger " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); 4227e48354ceSNicholas Bellinger 4228e48354ceSNicholas Bellinger spin_lock(&sess_idr_lock); 4229e48354ceSNicholas Bellinger idr_remove(&sess_idr, sess->session_index); 4230e48354ceSNicholas Bellinger spin_unlock(&sess_idr_lock); 4231e48354ceSNicholas Bellinger 4232e48354ceSNicholas Bellinger kfree(sess->sess_ops); 4233e48354ceSNicholas Bellinger sess->sess_ops = NULL; 4234e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4235e48354ceSNicholas Bellinger 4236e48354ceSNicholas Bellinger kfree(sess); 4237e48354ceSNicholas Bellinger return 0; 4238e48354ceSNicholas Bellinger } 4239e48354ceSNicholas Bellinger 4240e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_closesession( 4241e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4242e48354ceSNicholas Bellinger { 4243e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 4244e48354ceSNicholas Bellinger 4245e48354ceSNicholas Bellinger iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); 4246e48354ceSNicholas Bellinger iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); 4247e48354ceSNicholas Bellinger 4248e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4249e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 4250e48354ceSNicholas Bellinger 4251e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4252e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 4253e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 425499367f01SNicholas Bellinger target_put_session(sess->se_sess); 4255e48354ceSNicholas Bellinger } 4256e48354ceSNicholas Bellinger 4257e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_samecid( 4258e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4259e48354ceSNicholas Bellinger { 4260e48354ceSNicholas Bellinger iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); 4261e48354ceSNicholas Bellinger iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); 4262e48354ceSNicholas Bellinger 4263e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4264e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 4265e48354ceSNicholas Bellinger 4266e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4267e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4268e48354ceSNicholas Bellinger } 4269e48354ceSNicholas Bellinger 4270e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_diffcid( 4271e48354ceSNicholas Bellinger struct iscsi_conn *conn, 4272e48354ceSNicholas Bellinger u16 cid) 4273e48354ceSNicholas Bellinger { 4274e48354ceSNicholas Bellinger struct iscsi_conn *l_conn; 4275e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 4276e48354ceSNicholas Bellinger 4277e48354ceSNicholas Bellinger if (!sess) 4278e48354ceSNicholas Bellinger return; 4279e48354ceSNicholas Bellinger 4280e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4281e48354ceSNicholas Bellinger list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { 4282e48354ceSNicholas Bellinger if (l_conn->cid == cid) { 4283e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(l_conn); 4284e48354ceSNicholas Bellinger break; 4285e48354ceSNicholas Bellinger } 4286e48354ceSNicholas Bellinger } 4287e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4288e48354ceSNicholas Bellinger 4289e48354ceSNicholas Bellinger if (!l_conn) 4290e48354ceSNicholas Bellinger return; 4291e48354ceSNicholas Bellinger 4292e48354ceSNicholas Bellinger if (l_conn->sock) 4293e48354ceSNicholas Bellinger l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); 4294e48354ceSNicholas Bellinger 4295e48354ceSNicholas Bellinger spin_lock_bh(&l_conn->state_lock); 4296e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 4297e48354ceSNicholas Bellinger l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; 4298e48354ceSNicholas Bellinger spin_unlock_bh(&l_conn->state_lock); 4299e48354ceSNicholas Bellinger 4300e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(l_conn, 1); 4301e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(l_conn); 4302e48354ceSNicholas Bellinger } 4303e48354ceSNicholas Bellinger 4304e48354ceSNicholas Bellinger /* 4305e48354ceSNicholas Bellinger * Return of 0 causes the TX thread to restart. 4306e48354ceSNicholas Bellinger */ 4307e48354ceSNicholas Bellinger static int iscsit_logout_post_handler( 4308e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 4309e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4310e48354ceSNicholas Bellinger { 4311e48354ceSNicholas Bellinger int ret = 0; 4312e48354ceSNicholas Bellinger 4313e48354ceSNicholas Bellinger switch (cmd->logout_reason) { 4314e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_SESSION: 4315e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4316e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4317e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4318e48354ceSNicholas Bellinger default: 4319e48354ceSNicholas Bellinger iscsit_logout_post_handler_closesession(conn); 4320e48354ceSNicholas Bellinger break; 4321e48354ceSNicholas Bellinger } 4322e48354ceSNicholas Bellinger ret = 0; 4323e48354ceSNicholas Bellinger break; 4324e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: 4325e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 4326e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4327e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4328e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4329e48354ceSNicholas Bellinger default: 4330e48354ceSNicholas Bellinger iscsit_logout_post_handler_samecid(conn); 4331e48354ceSNicholas Bellinger break; 4332e48354ceSNicholas Bellinger } 4333e48354ceSNicholas Bellinger ret = 0; 4334e48354ceSNicholas Bellinger } else { 4335e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4336e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4337e48354ceSNicholas Bellinger iscsit_logout_post_handler_diffcid(conn, 4338e48354ceSNicholas Bellinger cmd->logout_cid); 4339e48354ceSNicholas Bellinger break; 4340e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CID_NOT_FOUND: 4341e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4342e48354ceSNicholas Bellinger default: 4343e48354ceSNicholas Bellinger break; 4344e48354ceSNicholas Bellinger } 4345e48354ceSNicholas Bellinger ret = 1; 4346e48354ceSNicholas Bellinger } 4347e48354ceSNicholas Bellinger break; 4348e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_RECOVERY: 4349e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4350e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4351e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CID_NOT_FOUND: 4352e48354ceSNicholas Bellinger case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: 4353e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4354e48354ceSNicholas Bellinger default: 4355e48354ceSNicholas Bellinger break; 4356e48354ceSNicholas Bellinger } 4357e48354ceSNicholas Bellinger ret = 1; 4358e48354ceSNicholas Bellinger break; 4359e48354ceSNicholas Bellinger default: 4360e48354ceSNicholas Bellinger break; 4361e48354ceSNicholas Bellinger 4362e48354ceSNicholas Bellinger } 4363e48354ceSNicholas Bellinger return ret; 4364e48354ceSNicholas Bellinger } 4365e48354ceSNicholas Bellinger 4366e48354ceSNicholas Bellinger void iscsit_fail_session(struct iscsi_session *sess) 4367e48354ceSNicholas Bellinger { 4368e48354ceSNicholas Bellinger struct iscsi_conn *conn; 4369e48354ceSNicholas Bellinger 4370e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4371e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 4372e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); 4373e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; 4374e48354ceSNicholas Bellinger } 4375e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4376e48354ceSNicholas Bellinger 4377e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); 4378e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FAILED; 4379e48354ceSNicholas Bellinger } 4380e48354ceSNicholas Bellinger 4381e48354ceSNicholas Bellinger int iscsit_free_session(struct iscsi_session *sess) 4382e48354ceSNicholas Bellinger { 4383e48354ceSNicholas Bellinger u16 conn_count = atomic_read(&sess->nconn); 4384e48354ceSNicholas Bellinger struct iscsi_conn *conn, *conn_tmp = NULL; 4385e48354ceSNicholas Bellinger int is_last; 4386e48354ceSNicholas Bellinger 4387e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4388e48354ceSNicholas Bellinger atomic_set(&sess->sleep_on_sess_wait_comp, 1); 4389e48354ceSNicholas Bellinger 4390e48354ceSNicholas Bellinger list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, 4391e48354ceSNicholas Bellinger conn_list) { 4392e48354ceSNicholas Bellinger if (conn_count == 0) 4393e48354ceSNicholas Bellinger break; 4394e48354ceSNicholas Bellinger 4395e48354ceSNicholas Bellinger if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { 4396e48354ceSNicholas Bellinger is_last = 1; 4397e48354ceSNicholas Bellinger } else { 4398e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_tmp); 4399e48354ceSNicholas Bellinger is_last = 0; 4400e48354ceSNicholas Bellinger } 4401e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 4402e48354ceSNicholas Bellinger 4403e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4404e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4405e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4406e48354ceSNicholas Bellinger 4407e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4408e48354ceSNicholas Bellinger if (is_last == 0) 4409e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_tmp); 4410e48354ceSNicholas Bellinger 4411e48354ceSNicholas Bellinger conn_count--; 4412e48354ceSNicholas Bellinger } 4413e48354ceSNicholas Bellinger 4414e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4415e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4416e48354ceSNicholas Bellinger wait_for_completion(&sess->session_wait_comp); 4417e48354ceSNicholas Bellinger } else 4418e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4419e48354ceSNicholas Bellinger 442099367f01SNicholas Bellinger target_put_session(sess->se_sess); 4421e48354ceSNicholas Bellinger return 0; 4422e48354ceSNicholas Bellinger } 4423e48354ceSNicholas Bellinger 4424e48354ceSNicholas Bellinger void iscsit_stop_session( 4425e48354ceSNicholas Bellinger struct iscsi_session *sess, 4426e48354ceSNicholas Bellinger int session_sleep, 4427e48354ceSNicholas Bellinger int connection_sleep) 4428e48354ceSNicholas Bellinger { 4429e48354ceSNicholas Bellinger u16 conn_count = atomic_read(&sess->nconn); 4430e48354ceSNicholas Bellinger struct iscsi_conn *conn, *conn_tmp = NULL; 4431e48354ceSNicholas Bellinger int is_last; 4432e48354ceSNicholas Bellinger 4433e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4434e48354ceSNicholas Bellinger if (session_sleep) 4435e48354ceSNicholas Bellinger atomic_set(&sess->sleep_on_sess_wait_comp, 1); 4436e48354ceSNicholas Bellinger 4437e48354ceSNicholas Bellinger if (connection_sleep) { 4438e48354ceSNicholas Bellinger list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, 4439e48354ceSNicholas Bellinger conn_list) { 4440e48354ceSNicholas Bellinger if (conn_count == 0) 4441e48354ceSNicholas Bellinger break; 4442e48354ceSNicholas Bellinger 4443e48354ceSNicholas Bellinger if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { 4444e48354ceSNicholas Bellinger is_last = 1; 4445e48354ceSNicholas Bellinger } else { 4446e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_tmp); 4447e48354ceSNicholas Bellinger is_last = 0; 4448e48354ceSNicholas Bellinger } 4449e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 4450e48354ceSNicholas Bellinger 4451e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4452e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4453e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4454e48354ceSNicholas Bellinger 4455e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4456e48354ceSNicholas Bellinger if (is_last == 0) 4457e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_tmp); 4458e48354ceSNicholas Bellinger conn_count--; 4459e48354ceSNicholas Bellinger } 4460e48354ceSNicholas Bellinger } else { 4461e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 4462e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 4463e48354ceSNicholas Bellinger } 4464e48354ceSNicholas Bellinger 4465e48354ceSNicholas Bellinger if (session_sleep && atomic_read(&sess->nconn)) { 4466e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4467e48354ceSNicholas Bellinger wait_for_completion(&sess->session_wait_comp); 4468e48354ceSNicholas Bellinger } else 4469e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4470e48354ceSNicholas Bellinger } 4471e48354ceSNicholas Bellinger 4472e48354ceSNicholas Bellinger int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) 4473e48354ceSNicholas Bellinger { 4474e48354ceSNicholas Bellinger struct iscsi_session *sess; 4475e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 4476e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 4477e48354ceSNicholas Bellinger int session_count = 0; 4478e48354ceSNicholas Bellinger 4479e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4480e48354ceSNicholas Bellinger if (tpg->nsessions && !force) { 4481e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4482e48354ceSNicholas Bellinger return -1; 4483e48354ceSNicholas Bellinger } 4484e48354ceSNicholas Bellinger 4485e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 4486e48354ceSNicholas Bellinger sess_list) { 4487e48354ceSNicholas Bellinger sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; 4488e48354ceSNicholas Bellinger 4489e48354ceSNicholas Bellinger spin_lock(&sess->conn_lock); 4490e48354ceSNicholas Bellinger if (atomic_read(&sess->session_fall_back_to_erl0) || 4491e48354ceSNicholas Bellinger atomic_read(&sess->session_logout) || 4492e48354ceSNicholas Bellinger (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 4493e48354ceSNicholas Bellinger spin_unlock(&sess->conn_lock); 4494e48354ceSNicholas Bellinger continue; 4495e48354ceSNicholas Bellinger } 4496e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 1); 4497e48354ceSNicholas Bellinger spin_unlock(&sess->conn_lock); 4498e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4499e48354ceSNicholas Bellinger 4500e48354ceSNicholas Bellinger iscsit_free_session(sess); 4501e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4502e48354ceSNicholas Bellinger 4503e48354ceSNicholas Bellinger session_count++; 4504e48354ceSNicholas Bellinger } 4505e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4506e48354ceSNicholas Bellinger 4507e48354ceSNicholas Bellinger pr_debug("Released %d iSCSI Session(s) from Target Portal" 4508e48354ceSNicholas Bellinger " Group: %hu\n", session_count, tpg->tpgt); 4509e48354ceSNicholas Bellinger return 0; 4510e48354ceSNicholas Bellinger } 4511e48354ceSNicholas Bellinger 4512e48354ceSNicholas Bellinger MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); 4513e48354ceSNicholas Bellinger MODULE_VERSION("4.1.x"); 4514e48354ceSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 4515e48354ceSNicholas Bellinger MODULE_LICENSE("GPL"); 4516e48354ceSNicholas Bellinger 4517e48354ceSNicholas Bellinger module_init(iscsi_target_init_module); 4518e48354ceSNicholas Bellinger module_exit(iscsi_target_cleanup_module); 4519