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 52baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 53baa4d64bSNicholas Bellinger 54e48354ceSNicholas Bellinger static LIST_HEAD(g_tiqn_list); 55e48354ceSNicholas Bellinger static LIST_HEAD(g_np_list); 56e48354ceSNicholas Bellinger static DEFINE_SPINLOCK(tiqn_lock); 57e48354ceSNicholas Bellinger static DEFINE_SPINLOCK(np_lock); 58e48354ceSNicholas Bellinger 59e48354ceSNicholas Bellinger static struct idr tiqn_idr; 60e48354ceSNicholas Bellinger struct idr sess_idr; 61e48354ceSNicholas Bellinger struct mutex auth_id_lock; 62e48354ceSNicholas Bellinger spinlock_t sess_idr_lock; 63e48354ceSNicholas Bellinger 64e48354ceSNicholas Bellinger struct iscsit_global *iscsit_global; 65e48354ceSNicholas Bellinger 66e48354ceSNicholas Bellinger struct kmem_cache *lio_cmd_cache; 67e48354ceSNicholas Bellinger struct kmem_cache *lio_qr_cache; 68e48354ceSNicholas Bellinger struct kmem_cache *lio_dr_cache; 69e48354ceSNicholas Bellinger struct kmem_cache *lio_ooo_cache; 70e48354ceSNicholas Bellinger struct kmem_cache *lio_r2t_cache; 71e48354ceSNicholas Bellinger 72e48354ceSNicholas Bellinger static int iscsit_handle_immediate_data(struct iscsi_cmd *, 73e48354ceSNicholas Bellinger unsigned char *buf, u32); 74e48354ceSNicholas Bellinger static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *); 75e48354ceSNicholas Bellinger 76e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) 77e48354ceSNicholas Bellinger { 78e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = NULL; 79e48354ceSNicholas Bellinger 80e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 81e48354ceSNicholas Bellinger list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { 82e48354ceSNicholas Bellinger if (!strcmp(tiqn->tiqn, buf)) { 83e48354ceSNicholas Bellinger 84e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 85e48354ceSNicholas Bellinger if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { 86e48354ceSNicholas Bellinger tiqn->tiqn_access_count++; 87e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 88e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 89e48354ceSNicholas Bellinger return tiqn; 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 92e48354ceSNicholas Bellinger } 93e48354ceSNicholas Bellinger } 94e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 95e48354ceSNicholas Bellinger 96e48354ceSNicholas Bellinger return NULL; 97e48354ceSNicholas Bellinger } 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) 100e48354ceSNicholas Bellinger { 101e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 102e48354ceSNicholas Bellinger if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { 103e48354ceSNicholas Bellinger tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; 104e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 105e48354ceSNicholas Bellinger return 0; 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 108e48354ceSNicholas Bellinger 109e48354ceSNicholas Bellinger return -1; 110e48354ceSNicholas Bellinger } 111e48354ceSNicholas Bellinger 112e48354ceSNicholas Bellinger void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) 113e48354ceSNicholas Bellinger { 114e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 115e48354ceSNicholas Bellinger tiqn->tiqn_access_count--; 116e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 117e48354ceSNicholas Bellinger } 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger /* 120e48354ceSNicholas Bellinger * Note that IQN formatting is expected to be done in userspace, and 121e48354ceSNicholas Bellinger * no explict IQN format checks are done here. 122e48354ceSNicholas Bellinger */ 123e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) 124e48354ceSNicholas Bellinger { 125e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = NULL; 126e48354ceSNicholas Bellinger int ret; 127e48354ceSNicholas Bellinger 1288f50c7f5SDan Carpenter if (strlen(buf) >= ISCSI_IQN_LEN) { 129e48354ceSNicholas Bellinger pr_err("Target IQN exceeds %d bytes\n", 130e48354ceSNicholas Bellinger ISCSI_IQN_LEN); 131e48354ceSNicholas Bellinger return ERR_PTR(-EINVAL); 132e48354ceSNicholas Bellinger } 133e48354ceSNicholas Bellinger 134e48354ceSNicholas Bellinger tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); 135e48354ceSNicholas Bellinger if (!tiqn) { 136e48354ceSNicholas Bellinger pr_err("Unable to allocate struct iscsi_tiqn\n"); 137e48354ceSNicholas Bellinger return ERR_PTR(-ENOMEM); 138e48354ceSNicholas Bellinger } 139e48354ceSNicholas Bellinger 140e48354ceSNicholas Bellinger sprintf(tiqn->tiqn, "%s", buf); 141e48354ceSNicholas Bellinger INIT_LIST_HEAD(&tiqn->tiqn_list); 142e48354ceSNicholas Bellinger INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); 143e48354ceSNicholas Bellinger spin_lock_init(&tiqn->tiqn_state_lock); 144e48354ceSNicholas Bellinger spin_lock_init(&tiqn->tiqn_tpg_lock); 145e48354ceSNicholas Bellinger spin_lock_init(&tiqn->sess_err_stats.lock); 146e48354ceSNicholas Bellinger spin_lock_init(&tiqn->login_stats.lock); 147e48354ceSNicholas Bellinger spin_lock_init(&tiqn->logout_stats.lock); 148e48354ceSNicholas Bellinger 149e48354ceSNicholas Bellinger tiqn->tiqn_state = TIQN_STATE_ACTIVE; 150e48354ceSNicholas Bellinger 151c9365bd0STejun Heo idr_preload(GFP_KERNEL); 152e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 153c9365bd0STejun Heo 154c9365bd0STejun Heo ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); 155e48354ceSNicholas Bellinger if (ret < 0) { 156c9365bd0STejun Heo pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); 157e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 158c9365bd0STejun Heo idr_preload_end(); 159e48354ceSNicholas Bellinger kfree(tiqn); 160e48354ceSNicholas Bellinger return ERR_PTR(ret); 161e48354ceSNicholas Bellinger } 162c9365bd0STejun Heo tiqn->tiqn_index = ret; 163e48354ceSNicholas Bellinger list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); 164c9365bd0STejun Heo 165e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 166c9365bd0STejun Heo idr_preload_end(); 167e48354ceSNicholas Bellinger 168e48354ceSNicholas Bellinger pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); 169e48354ceSNicholas Bellinger 170e48354ceSNicholas Bellinger return tiqn; 171e48354ceSNicholas Bellinger 172e48354ceSNicholas Bellinger } 173e48354ceSNicholas Bellinger 174e48354ceSNicholas Bellinger static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) 175e48354ceSNicholas Bellinger { 176e48354ceSNicholas Bellinger /* 177e48354ceSNicholas Bellinger * Wait for accesses to said struct iscsi_tiqn to end. 178e48354ceSNicholas Bellinger */ 179e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 180e48354ceSNicholas Bellinger while (tiqn->tiqn_access_count != 0) { 181e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 182e48354ceSNicholas Bellinger msleep(10); 183e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_state_lock); 184e48354ceSNicholas Bellinger } 185e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_state_lock); 186e48354ceSNicholas Bellinger } 187e48354ceSNicholas Bellinger 188e48354ceSNicholas Bellinger void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) 189e48354ceSNicholas Bellinger { 190e48354ceSNicholas Bellinger /* 191e48354ceSNicholas Bellinger * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN 192e48354ceSNicholas Bellinger * while holding tiqn->tiqn_state_lock. This means that all subsequent 193e48354ceSNicholas Bellinger * attempts to access this struct iscsi_tiqn will fail from both transport 194e48354ceSNicholas Bellinger * fabric and control code paths. 195e48354ceSNicholas Bellinger */ 196e48354ceSNicholas Bellinger if (iscsit_set_tiqn_shutdown(tiqn) < 0) { 197e48354ceSNicholas Bellinger pr_err("iscsit_set_tiqn_shutdown() failed\n"); 198e48354ceSNicholas Bellinger return; 199e48354ceSNicholas Bellinger } 200e48354ceSNicholas Bellinger 201e48354ceSNicholas Bellinger iscsit_wait_for_tiqn(tiqn); 202e48354ceSNicholas Bellinger 203e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 204e48354ceSNicholas Bellinger list_del(&tiqn->tiqn_list); 205e48354ceSNicholas Bellinger idr_remove(&tiqn_idr, tiqn->tiqn_index); 206e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 207e48354ceSNicholas Bellinger 208e48354ceSNicholas Bellinger pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", 209e48354ceSNicholas Bellinger tiqn->tiqn); 210e48354ceSNicholas Bellinger kfree(tiqn); 211e48354ceSNicholas Bellinger } 212e48354ceSNicholas Bellinger 213e48354ceSNicholas Bellinger int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) 214e48354ceSNicholas Bellinger { 215e48354ceSNicholas Bellinger int ret; 216e48354ceSNicholas Bellinger /* 217e48354ceSNicholas Bellinger * Determine if the network portal is accepting storage traffic. 218e48354ceSNicholas Bellinger */ 219e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 220e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 221e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 222e48354ceSNicholas Bellinger return -1; 223e48354ceSNicholas Bellinger } 224e48354ceSNicholas Bellinger if (np->np_login_tpg) { 225e48354ceSNicholas Bellinger pr_err("np->np_login_tpg() is not NULL!\n"); 226e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 227e48354ceSNicholas Bellinger return -1; 228e48354ceSNicholas Bellinger } 229e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 230e48354ceSNicholas Bellinger /* 231e48354ceSNicholas Bellinger * Determine if the portal group is accepting storage traffic. 232e48354ceSNicholas Bellinger */ 233e48354ceSNicholas Bellinger spin_lock_bh(&tpg->tpg_state_lock); 234e48354ceSNicholas Bellinger if (tpg->tpg_state != TPG_STATE_ACTIVE) { 235e48354ceSNicholas Bellinger spin_unlock_bh(&tpg->tpg_state_lock); 236e48354ceSNicholas Bellinger return -1; 237e48354ceSNicholas Bellinger } 238e48354ceSNicholas Bellinger spin_unlock_bh(&tpg->tpg_state_lock); 239e48354ceSNicholas Bellinger 240e48354ceSNicholas Bellinger /* 241e48354ceSNicholas Bellinger * Here we serialize access across the TIQN+TPG Tuple. 242e48354ceSNicholas Bellinger */ 243e48354ceSNicholas Bellinger ret = mutex_lock_interruptible(&tpg->np_login_lock); 244e48354ceSNicholas Bellinger if ((ret != 0) || signal_pending(current)) 245e48354ceSNicholas Bellinger return -1; 246e48354ceSNicholas Bellinger 247e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 248e48354ceSNicholas Bellinger np->np_login_tpg = tpg; 249e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 250e48354ceSNicholas Bellinger 251e48354ceSNicholas Bellinger return 0; 252e48354ceSNicholas Bellinger } 253e48354ceSNicholas Bellinger 254e48354ceSNicholas Bellinger int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) 255e48354ceSNicholas Bellinger { 256e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 257e48354ceSNicholas Bellinger 258e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 259e48354ceSNicholas Bellinger np->np_login_tpg = NULL; 260e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 261e48354ceSNicholas Bellinger 262e48354ceSNicholas Bellinger mutex_unlock(&tpg->np_login_lock); 263e48354ceSNicholas Bellinger 264e48354ceSNicholas Bellinger if (tiqn) 265e48354ceSNicholas Bellinger iscsit_put_tiqn_for_login(tiqn); 266e48354ceSNicholas Bellinger 267e48354ceSNicholas Bellinger return 0; 268e48354ceSNicholas Bellinger } 269e48354ceSNicholas Bellinger 27005b96892SNicholas Bellinger bool iscsit_check_np_match( 271e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr, 27205b96892SNicholas Bellinger struct iscsi_np *np, 273e48354ceSNicholas Bellinger int network_transport) 274e48354ceSNicholas Bellinger { 275e48354ceSNicholas Bellinger struct sockaddr_in *sock_in, *sock_in_e; 276e48354ceSNicholas Bellinger struct sockaddr_in6 *sock_in6, *sock_in6_e; 27705b96892SNicholas Bellinger bool ip_match = false; 278e48354ceSNicholas Bellinger u16 port; 279e48354ceSNicholas Bellinger 28005b96892SNicholas Bellinger if (sockaddr->ss_family == AF_INET6) { 28105b96892SNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)sockaddr; 28205b96892SNicholas Bellinger sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; 28305b96892SNicholas Bellinger 28405b96892SNicholas Bellinger if (!memcmp(&sock_in6->sin6_addr.in6_u, 28505b96892SNicholas Bellinger &sock_in6_e->sin6_addr.in6_u, 28605b96892SNicholas Bellinger sizeof(struct in6_addr))) 28705b96892SNicholas Bellinger ip_match = true; 28805b96892SNicholas Bellinger 28905b96892SNicholas Bellinger port = ntohs(sock_in6->sin6_port); 29005b96892SNicholas Bellinger } else { 29105b96892SNicholas Bellinger sock_in = (struct sockaddr_in *)sockaddr; 29205b96892SNicholas Bellinger sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; 29305b96892SNicholas Bellinger 29405b96892SNicholas Bellinger if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) 29505b96892SNicholas Bellinger ip_match = true; 29605b96892SNicholas Bellinger 29705b96892SNicholas Bellinger port = ntohs(sock_in->sin_port); 29805b96892SNicholas Bellinger } 29905b96892SNicholas Bellinger 30005b96892SNicholas Bellinger if ((ip_match == true) && (np->np_port == port) && 30105b96892SNicholas Bellinger (np->np_network_transport == network_transport)) 30205b96892SNicholas Bellinger return true; 30305b96892SNicholas Bellinger 30405b96892SNicholas Bellinger return false; 30505b96892SNicholas Bellinger } 30605b96892SNicholas Bellinger 30705b96892SNicholas Bellinger static struct iscsi_np *iscsit_get_np( 30805b96892SNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr, 30905b96892SNicholas Bellinger int network_transport) 31005b96892SNicholas Bellinger { 31105b96892SNicholas Bellinger struct iscsi_np *np; 31205b96892SNicholas Bellinger bool match; 31305b96892SNicholas Bellinger 314e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 315e48354ceSNicholas Bellinger list_for_each_entry(np, &g_np_list, np_list) { 316e48354ceSNicholas Bellinger spin_lock(&np->np_thread_lock); 317e48354ceSNicholas Bellinger if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { 318e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 319e48354ceSNicholas Bellinger continue; 320e48354ceSNicholas Bellinger } 321e48354ceSNicholas Bellinger 32205b96892SNicholas Bellinger match = iscsit_check_np_match(sockaddr, np, network_transport); 32305b96892SNicholas Bellinger if (match == true) { 324e48354ceSNicholas Bellinger /* 325e48354ceSNicholas Bellinger * Increment the np_exports reference count now to 326e48354ceSNicholas Bellinger * prevent iscsit_del_np() below from being called 327e48354ceSNicholas Bellinger * while iscsi_tpg_add_network_portal() is called. 328e48354ceSNicholas Bellinger */ 329e48354ceSNicholas Bellinger np->np_exports++; 330e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 331e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 332e48354ceSNicholas Bellinger return np; 333e48354ceSNicholas Bellinger } 334e48354ceSNicholas Bellinger spin_unlock(&np->np_thread_lock); 335e48354ceSNicholas Bellinger } 336e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 337e48354ceSNicholas Bellinger 338e48354ceSNicholas Bellinger return NULL; 339e48354ceSNicholas Bellinger } 340e48354ceSNicholas Bellinger 341e48354ceSNicholas Bellinger struct iscsi_np *iscsit_add_np( 342e48354ceSNicholas Bellinger struct __kernel_sockaddr_storage *sockaddr, 343e48354ceSNicholas Bellinger char *ip_str, 344e48354ceSNicholas Bellinger int network_transport) 345e48354ceSNicholas Bellinger { 346e48354ceSNicholas Bellinger struct sockaddr_in *sock_in; 347e48354ceSNicholas Bellinger struct sockaddr_in6 *sock_in6; 348e48354ceSNicholas Bellinger struct iscsi_np *np; 349e48354ceSNicholas Bellinger int ret; 350e48354ceSNicholas Bellinger /* 351e48354ceSNicholas Bellinger * Locate the existing struct iscsi_np if already active.. 352e48354ceSNicholas Bellinger */ 353e48354ceSNicholas Bellinger np = iscsit_get_np(sockaddr, network_transport); 354e48354ceSNicholas Bellinger if (np) 355e48354ceSNicholas Bellinger return np; 356e48354ceSNicholas Bellinger 357e48354ceSNicholas Bellinger np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); 358e48354ceSNicholas Bellinger if (!np) { 359e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_np\n"); 360e48354ceSNicholas Bellinger return ERR_PTR(-ENOMEM); 361e48354ceSNicholas Bellinger } 362e48354ceSNicholas Bellinger 363e48354ceSNicholas Bellinger np->np_flags |= NPF_IP_NETWORK; 364e48354ceSNicholas Bellinger if (sockaddr->ss_family == AF_INET6) { 365e48354ceSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)sockaddr; 366e48354ceSNicholas Bellinger snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); 367e48354ceSNicholas Bellinger np->np_port = ntohs(sock_in6->sin6_port); 368e48354ceSNicholas Bellinger } else { 369e48354ceSNicholas Bellinger sock_in = (struct sockaddr_in *)sockaddr; 370e48354ceSNicholas Bellinger sprintf(np->np_ip, "%s", ip_str); 371e48354ceSNicholas Bellinger np->np_port = ntohs(sock_in->sin_port); 372e48354ceSNicholas Bellinger } 373e48354ceSNicholas Bellinger 374e48354ceSNicholas Bellinger np->np_network_transport = network_transport; 375e48354ceSNicholas Bellinger spin_lock_init(&np->np_thread_lock); 376e48354ceSNicholas Bellinger init_completion(&np->np_restart_comp); 377e48354ceSNicholas Bellinger INIT_LIST_HEAD(&np->np_list); 378e48354ceSNicholas Bellinger 379e48354ceSNicholas Bellinger ret = iscsi_target_setup_login_socket(np, sockaddr); 380e48354ceSNicholas Bellinger if (ret != 0) { 381e48354ceSNicholas Bellinger kfree(np); 382e48354ceSNicholas Bellinger return ERR_PTR(ret); 383e48354ceSNicholas Bellinger } 384e48354ceSNicholas Bellinger 385e48354ceSNicholas Bellinger np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); 386e48354ceSNicholas Bellinger if (IS_ERR(np->np_thread)) { 387e48354ceSNicholas Bellinger pr_err("Unable to create kthread: iscsi_np\n"); 388e48354ceSNicholas Bellinger ret = PTR_ERR(np->np_thread); 389e48354ceSNicholas Bellinger kfree(np); 390e48354ceSNicholas Bellinger return ERR_PTR(ret); 391e48354ceSNicholas Bellinger } 392e48354ceSNicholas Bellinger /* 393e48354ceSNicholas Bellinger * Increment the np_exports reference count now to prevent 394e48354ceSNicholas Bellinger * iscsit_del_np() below from being run while a new call to 395e48354ceSNicholas Bellinger * iscsi_tpg_add_network_portal() for a matching iscsi_np is 396e48354ceSNicholas Bellinger * active. We don't need to hold np->np_thread_lock at this 397e48354ceSNicholas Bellinger * point because iscsi_np has not been added to g_np_list yet. 398e48354ceSNicholas Bellinger */ 399e48354ceSNicholas Bellinger np->np_exports = 1; 400e48354ceSNicholas Bellinger 401e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 402e48354ceSNicholas Bellinger list_add_tail(&np->np_list, &g_np_list); 403e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 404e48354ceSNicholas Bellinger 405e48354ceSNicholas Bellinger pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", 406baa4d64bSNicholas Bellinger np->np_ip, np->np_port, np->np_transport->name); 407e48354ceSNicholas Bellinger 408e48354ceSNicholas Bellinger return np; 409e48354ceSNicholas Bellinger } 410e48354ceSNicholas Bellinger 411e48354ceSNicholas Bellinger int iscsit_reset_np_thread( 412e48354ceSNicholas Bellinger struct iscsi_np *np, 413e48354ceSNicholas Bellinger struct iscsi_tpg_np *tpg_np, 414e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg) 415e48354ceSNicholas Bellinger { 416e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 417e48354ceSNicholas Bellinger if (tpg && tpg_np) { 418e48354ceSNicholas Bellinger /* 419e48354ceSNicholas Bellinger * The reset operation need only be performed when the 420e48354ceSNicholas Bellinger * passed struct iscsi_portal_group has a login in progress 421e48354ceSNicholas Bellinger * to one of the network portals. 422e48354ceSNicholas Bellinger */ 423e48354ceSNicholas Bellinger if (tpg_np->tpg_np->np_login_tpg != tpg) { 424e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 425e48354ceSNicholas Bellinger return 0; 426e48354ceSNicholas Bellinger } 427e48354ceSNicholas Bellinger } 428e48354ceSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { 429e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 430e48354ceSNicholas Bellinger return 0; 431e48354ceSNicholas Bellinger } 432e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_RESET; 433e48354ceSNicholas Bellinger 434e48354ceSNicholas Bellinger if (np->np_thread) { 435e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 436e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 437e48354ceSNicholas Bellinger wait_for_completion(&np->np_restart_comp); 438e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 439e48354ceSNicholas Bellinger } 440e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 441e48354ceSNicholas Bellinger 442e48354ceSNicholas Bellinger return 0; 443e48354ceSNicholas Bellinger } 444e48354ceSNicholas Bellinger 445baa4d64bSNicholas Bellinger static void iscsit_free_np(struct iscsi_np *np) 446e48354ceSNicholas Bellinger { 447bf6932f4SAl Viro if (np->np_socket) 448e48354ceSNicholas Bellinger sock_release(np->np_socket); 449e48354ceSNicholas Bellinger } 450e48354ceSNicholas Bellinger 451e48354ceSNicholas Bellinger int iscsit_del_np(struct iscsi_np *np) 452e48354ceSNicholas Bellinger { 453e48354ceSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 454e48354ceSNicholas Bellinger np->np_exports--; 455e48354ceSNicholas Bellinger if (np->np_exports) { 456e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 457e48354ceSNicholas Bellinger return 0; 458e48354ceSNicholas Bellinger } 459e48354ceSNicholas Bellinger np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; 460e48354ceSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 461e48354ceSNicholas Bellinger 462e48354ceSNicholas Bellinger if (np->np_thread) { 463e48354ceSNicholas Bellinger /* 464e48354ceSNicholas Bellinger * We need to send the signal to wakeup Linux/Net 465e48354ceSNicholas Bellinger * which may be sleeping in sock_accept().. 466e48354ceSNicholas Bellinger */ 467e48354ceSNicholas Bellinger send_sig(SIGINT, np->np_thread, 1); 468e48354ceSNicholas Bellinger kthread_stop(np->np_thread); 469e48354ceSNicholas Bellinger } 470baa4d64bSNicholas Bellinger 471baa4d64bSNicholas Bellinger np->np_transport->iscsit_free_np(np); 472e48354ceSNicholas Bellinger 473e48354ceSNicholas Bellinger spin_lock_bh(&np_lock); 474e48354ceSNicholas Bellinger list_del(&np->np_list); 475e48354ceSNicholas Bellinger spin_unlock_bh(&np_lock); 476e48354ceSNicholas Bellinger 477e48354ceSNicholas Bellinger pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", 478baa4d64bSNicholas Bellinger np->np_ip, np->np_port, np->np_transport->name); 479e48354ceSNicholas Bellinger 480baa4d64bSNicholas Bellinger iscsit_put_transport(np->np_transport); 481e48354ceSNicholas Bellinger kfree(np); 482e48354ceSNicholas Bellinger return 0; 483e48354ceSNicholas Bellinger } 484e48354ceSNicholas Bellinger 485baa4d64bSNicholas Bellinger static struct iscsit_transport iscsi_target_transport = { 486baa4d64bSNicholas Bellinger .name = "iSCSI/TCP", 487baa4d64bSNicholas Bellinger .transport_type = ISCSI_TCP, 488baa4d64bSNicholas Bellinger .owner = NULL, 489baa4d64bSNicholas Bellinger .iscsit_setup_np = iscsit_setup_np, 490baa4d64bSNicholas Bellinger .iscsit_accept_np = iscsit_accept_np, 491baa4d64bSNicholas Bellinger .iscsit_free_np = iscsit_free_np, 492baa4d64bSNicholas Bellinger .iscsit_get_login_rx = iscsit_get_login_rx, 493baa4d64bSNicholas Bellinger .iscsit_put_login_tx = iscsit_put_login_tx, 494baa4d64bSNicholas Bellinger }; 495baa4d64bSNicholas Bellinger 496e48354ceSNicholas Bellinger static int __init iscsi_target_init_module(void) 497e48354ceSNicholas Bellinger { 498e48354ceSNicholas Bellinger int ret = 0; 499e48354ceSNicholas Bellinger 500e48354ceSNicholas Bellinger pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); 501e48354ceSNicholas Bellinger 502e48354ceSNicholas Bellinger iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); 503e48354ceSNicholas Bellinger if (!iscsit_global) { 504e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for iscsit_global\n"); 505e48354ceSNicholas Bellinger return -1; 506e48354ceSNicholas Bellinger } 507e48354ceSNicholas Bellinger mutex_init(&auth_id_lock); 508e48354ceSNicholas Bellinger spin_lock_init(&sess_idr_lock); 509e48354ceSNicholas Bellinger idr_init(&tiqn_idr); 510e48354ceSNicholas Bellinger idr_init(&sess_idr); 511e48354ceSNicholas Bellinger 512e48354ceSNicholas Bellinger ret = iscsi_target_register_configfs(); 513e48354ceSNicholas Bellinger if (ret < 0) 514e48354ceSNicholas Bellinger goto out; 515e48354ceSNicholas Bellinger 516e48354ceSNicholas Bellinger ret = iscsi_thread_set_init(); 517e48354ceSNicholas Bellinger if (ret < 0) 518e48354ceSNicholas Bellinger goto configfs_out; 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != 521e48354ceSNicholas Bellinger TARGET_THREAD_SET_COUNT) { 522e48354ceSNicholas Bellinger pr_err("iscsi_allocate_thread_sets() returned" 523e48354ceSNicholas Bellinger " unexpected value!\n"); 524e48354ceSNicholas Bellinger goto ts_out1; 525e48354ceSNicholas Bellinger } 526e48354ceSNicholas Bellinger 527e48354ceSNicholas Bellinger lio_cmd_cache = kmem_cache_create("lio_cmd_cache", 528e48354ceSNicholas Bellinger sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), 529e48354ceSNicholas Bellinger 0, NULL); 530e48354ceSNicholas Bellinger if (!lio_cmd_cache) { 531e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 532e48354ceSNicholas Bellinger " lio_cmd_cache\n"); 533e48354ceSNicholas Bellinger goto ts_out2; 534e48354ceSNicholas Bellinger } 535e48354ceSNicholas Bellinger 536e48354ceSNicholas Bellinger lio_qr_cache = kmem_cache_create("lio_qr_cache", 537e48354ceSNicholas Bellinger sizeof(struct iscsi_queue_req), 538e48354ceSNicholas Bellinger __alignof__(struct iscsi_queue_req), 0, NULL); 539e48354ceSNicholas Bellinger if (!lio_qr_cache) { 540e48354ceSNicholas Bellinger pr_err("nable to kmem_cache_create() for" 541e48354ceSNicholas Bellinger " lio_qr_cache\n"); 542e48354ceSNicholas Bellinger goto cmd_out; 543e48354ceSNicholas Bellinger } 544e48354ceSNicholas Bellinger 545e48354ceSNicholas Bellinger lio_dr_cache = kmem_cache_create("lio_dr_cache", 546e48354ceSNicholas Bellinger sizeof(struct iscsi_datain_req), 547e48354ceSNicholas Bellinger __alignof__(struct iscsi_datain_req), 0, NULL); 548e48354ceSNicholas Bellinger if (!lio_dr_cache) { 549e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 550e48354ceSNicholas Bellinger " lio_dr_cache\n"); 551e48354ceSNicholas Bellinger goto qr_out; 552e48354ceSNicholas Bellinger } 553e48354ceSNicholas Bellinger 554e48354ceSNicholas Bellinger lio_ooo_cache = kmem_cache_create("lio_ooo_cache", 555e48354ceSNicholas Bellinger sizeof(struct iscsi_ooo_cmdsn), 556e48354ceSNicholas Bellinger __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); 557e48354ceSNicholas Bellinger if (!lio_ooo_cache) { 558e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 559e48354ceSNicholas Bellinger " lio_ooo_cache\n"); 560e48354ceSNicholas Bellinger goto dr_out; 561e48354ceSNicholas Bellinger } 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger lio_r2t_cache = kmem_cache_create("lio_r2t_cache", 564e48354ceSNicholas Bellinger sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), 565e48354ceSNicholas Bellinger 0, NULL); 566e48354ceSNicholas Bellinger if (!lio_r2t_cache) { 567e48354ceSNicholas Bellinger pr_err("Unable to kmem_cache_create() for" 568e48354ceSNicholas Bellinger " lio_r2t_cache\n"); 569e48354ceSNicholas Bellinger goto ooo_out; 570e48354ceSNicholas Bellinger } 571e48354ceSNicholas Bellinger 572baa4d64bSNicholas Bellinger iscsit_register_transport(&iscsi_target_transport); 573baa4d64bSNicholas Bellinger 574e48354ceSNicholas Bellinger if (iscsit_load_discovery_tpg() < 0) 575e48354ceSNicholas Bellinger goto r2t_out; 576e48354ceSNicholas Bellinger 577e48354ceSNicholas Bellinger return ret; 578e48354ceSNicholas Bellinger r2t_out: 579e48354ceSNicholas Bellinger kmem_cache_destroy(lio_r2t_cache); 580e48354ceSNicholas Bellinger ooo_out: 581e48354ceSNicholas Bellinger kmem_cache_destroy(lio_ooo_cache); 582e48354ceSNicholas Bellinger dr_out: 583e48354ceSNicholas Bellinger kmem_cache_destroy(lio_dr_cache); 584e48354ceSNicholas Bellinger qr_out: 585e48354ceSNicholas Bellinger kmem_cache_destroy(lio_qr_cache); 586e48354ceSNicholas Bellinger cmd_out: 587e48354ceSNicholas Bellinger kmem_cache_destroy(lio_cmd_cache); 588e48354ceSNicholas Bellinger ts_out2: 589e48354ceSNicholas Bellinger iscsi_deallocate_thread_sets(); 590e48354ceSNicholas Bellinger ts_out1: 591e48354ceSNicholas Bellinger iscsi_thread_set_free(); 592e48354ceSNicholas Bellinger configfs_out: 593e48354ceSNicholas Bellinger iscsi_target_deregister_configfs(); 594e48354ceSNicholas Bellinger out: 595e48354ceSNicholas Bellinger kfree(iscsit_global); 596e48354ceSNicholas Bellinger return -ENOMEM; 597e48354ceSNicholas Bellinger } 598e48354ceSNicholas Bellinger 599e48354ceSNicholas Bellinger static void __exit iscsi_target_cleanup_module(void) 600e48354ceSNicholas Bellinger { 601e48354ceSNicholas Bellinger iscsi_deallocate_thread_sets(); 602e48354ceSNicholas Bellinger iscsi_thread_set_free(); 603e48354ceSNicholas Bellinger iscsit_release_discovery_tpg(); 604baa4d64bSNicholas Bellinger iscsit_unregister_transport(&iscsi_target_transport); 605e48354ceSNicholas Bellinger kmem_cache_destroy(lio_cmd_cache); 606e48354ceSNicholas Bellinger kmem_cache_destroy(lio_qr_cache); 607e48354ceSNicholas Bellinger kmem_cache_destroy(lio_dr_cache); 608e48354ceSNicholas Bellinger kmem_cache_destroy(lio_ooo_cache); 609e48354ceSNicholas Bellinger kmem_cache_destroy(lio_r2t_cache); 610e48354ceSNicholas Bellinger 611e48354ceSNicholas Bellinger iscsi_target_deregister_configfs(); 612e48354ceSNicholas Bellinger 613e48354ceSNicholas Bellinger kfree(iscsit_global); 614e48354ceSNicholas Bellinger } 615e48354ceSNicholas Bellinger 6168b1e1244SAndy Grover static int iscsit_add_reject( 617e48354ceSNicholas Bellinger u8 reason, 618e48354ceSNicholas Bellinger int fail_conn, 619e48354ceSNicholas Bellinger unsigned char *buf, 620e48354ceSNicholas Bellinger struct iscsi_conn *conn) 621e48354ceSNicholas Bellinger { 622e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 623e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 624e48354ceSNicholas Bellinger int ret; 625e48354ceSNicholas Bellinger 626e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 627e48354ceSNicholas Bellinger if (!cmd) 628e48354ceSNicholas Bellinger return -1; 629e48354ceSNicholas Bellinger 630e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_REJECT; 631e48354ceSNicholas Bellinger if (fail_conn) 632e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; 633e48354ceSNicholas Bellinger 634e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 635e48354ceSNicholas Bellinger hdr->reason = reason; 636e48354ceSNicholas Bellinger 6371c3d5794SThomas Meyer cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); 638e48354ceSNicholas Bellinger if (!cmd->buf_ptr) { 639e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for cmd->buf_ptr\n"); 640e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 641e48354ceSNicholas Bellinger return -1; 642e48354ceSNicholas Bellinger } 643e48354ceSNicholas Bellinger 644e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 6452fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 646e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 647e48354ceSNicholas Bellinger 648e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_REJECT; 649e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 650e48354ceSNicholas Bellinger 651e48354ceSNicholas Bellinger ret = wait_for_completion_interruptible(&cmd->reject_comp); 652e48354ceSNicholas Bellinger if (ret != 0) 653e48354ceSNicholas Bellinger return -1; 654e48354ceSNicholas Bellinger 655e48354ceSNicholas Bellinger return (!fail_conn) ? 0 : -1; 656e48354ceSNicholas Bellinger } 657e48354ceSNicholas Bellinger 658e48354ceSNicholas Bellinger int iscsit_add_reject_from_cmd( 659e48354ceSNicholas Bellinger u8 reason, 660e48354ceSNicholas Bellinger int fail_conn, 661e48354ceSNicholas Bellinger int add_to_conn, 662e48354ceSNicholas Bellinger unsigned char *buf, 663e48354ceSNicholas Bellinger struct iscsi_cmd *cmd) 664e48354ceSNicholas Bellinger { 665e48354ceSNicholas Bellinger struct iscsi_conn *conn; 666e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 667e48354ceSNicholas Bellinger int ret; 668e48354ceSNicholas Bellinger 669e48354ceSNicholas Bellinger if (!cmd->conn) { 670e48354ceSNicholas Bellinger pr_err("cmd->conn is NULL for ITT: 0x%08x\n", 671e48354ceSNicholas Bellinger cmd->init_task_tag); 672e48354ceSNicholas Bellinger return -1; 673e48354ceSNicholas Bellinger } 674e48354ceSNicholas Bellinger conn = cmd->conn; 675e48354ceSNicholas Bellinger 676e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_REJECT; 677e48354ceSNicholas Bellinger if (fail_conn) 678e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; 679e48354ceSNicholas Bellinger 680e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 681e48354ceSNicholas Bellinger hdr->reason = reason; 682e48354ceSNicholas Bellinger 6831c3d5794SThomas Meyer cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); 684e48354ceSNicholas Bellinger if (!cmd->buf_ptr) { 685e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for cmd->buf_ptr\n"); 686e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 687e48354ceSNicholas Bellinger return -1; 688e48354ceSNicholas Bellinger } 689e48354ceSNicholas Bellinger 690e48354ceSNicholas Bellinger if (add_to_conn) { 691e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 6922fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 693e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 694e48354ceSNicholas Bellinger } 695e48354ceSNicholas Bellinger 696e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_REJECT; 697e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 698e48354ceSNicholas Bellinger 699e48354ceSNicholas Bellinger ret = wait_for_completion_interruptible(&cmd->reject_comp); 700e48354ceSNicholas Bellinger if (ret != 0) 701e48354ceSNicholas Bellinger return -1; 702e48354ceSNicholas Bellinger 703e48354ceSNicholas Bellinger return (!fail_conn) ? 0 : -1; 704e48354ceSNicholas Bellinger } 705e48354ceSNicholas Bellinger 706e48354ceSNicholas Bellinger /* 707e48354ceSNicholas Bellinger * Map some portion of the allocated scatterlist to an iovec, suitable for 708bfb79eacSAndy Grover * kernel sockets to copy data in/out. 709e48354ceSNicholas Bellinger */ 710e48354ceSNicholas Bellinger static int iscsit_map_iovec( 711e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 712e48354ceSNicholas Bellinger struct kvec *iov, 713e48354ceSNicholas Bellinger u32 data_offset, 714e48354ceSNicholas Bellinger u32 data_length) 715e48354ceSNicholas Bellinger { 716e48354ceSNicholas Bellinger u32 i = 0; 717e48354ceSNicholas Bellinger struct scatterlist *sg; 718e48354ceSNicholas Bellinger unsigned int page_off; 719e48354ceSNicholas Bellinger 720e48354ceSNicholas Bellinger /* 721bfb79eacSAndy Grover * We know each entry in t_data_sg contains a page. 722e48354ceSNicholas Bellinger */ 723bfb79eacSAndy Grover sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; 724e48354ceSNicholas Bellinger page_off = (data_offset % PAGE_SIZE); 725e48354ceSNicholas Bellinger 726e48354ceSNicholas Bellinger cmd->first_data_sg = sg; 727e48354ceSNicholas Bellinger cmd->first_data_sg_off = page_off; 728e48354ceSNicholas Bellinger 729e48354ceSNicholas Bellinger while (data_length) { 730e48354ceSNicholas Bellinger u32 cur_len = min_t(u32, data_length, sg->length - page_off); 731e48354ceSNicholas Bellinger 732e48354ceSNicholas Bellinger iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; 733e48354ceSNicholas Bellinger iov[i].iov_len = cur_len; 734e48354ceSNicholas Bellinger 735e48354ceSNicholas Bellinger data_length -= cur_len; 736e48354ceSNicholas Bellinger page_off = 0; 737e48354ceSNicholas Bellinger sg = sg_next(sg); 738e48354ceSNicholas Bellinger i++; 739e48354ceSNicholas Bellinger } 740e48354ceSNicholas Bellinger 741e48354ceSNicholas Bellinger cmd->kmapped_nents = i; 742e48354ceSNicholas Bellinger 743e48354ceSNicholas Bellinger return i; 744e48354ceSNicholas Bellinger } 745e48354ceSNicholas Bellinger 746e48354ceSNicholas Bellinger static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) 747e48354ceSNicholas Bellinger { 748e48354ceSNicholas Bellinger u32 i; 749e48354ceSNicholas Bellinger struct scatterlist *sg; 750e48354ceSNicholas Bellinger 751e48354ceSNicholas Bellinger sg = cmd->first_data_sg; 752e48354ceSNicholas Bellinger 753e48354ceSNicholas Bellinger for (i = 0; i < cmd->kmapped_nents; i++) 754e48354ceSNicholas Bellinger kunmap(sg_page(&sg[i])); 755e48354ceSNicholas Bellinger } 756e48354ceSNicholas Bellinger 757e48354ceSNicholas Bellinger static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) 758e48354ceSNicholas Bellinger { 759e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 760e48354ceSNicholas Bellinger 761e48354ceSNicholas Bellinger conn->exp_statsn = exp_statsn; 762e48354ceSNicholas Bellinger 763e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 7642fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 765e48354ceSNicholas Bellinger spin_lock(&cmd->istate_lock); 766e48354ceSNicholas Bellinger if ((cmd->i_state == ISTATE_SENT_STATUS) && 76764c13330SSteve Hodgson iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { 768e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 769e48354ceSNicholas Bellinger spin_unlock(&cmd->istate_lock); 770e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, 771e48354ceSNicholas Bellinger cmd->i_state); 772e48354ceSNicholas Bellinger continue; 773e48354ceSNicholas Bellinger } 774e48354ceSNicholas Bellinger spin_unlock(&cmd->istate_lock); 775e48354ceSNicholas Bellinger } 776e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 777e48354ceSNicholas Bellinger } 778e48354ceSNicholas Bellinger 779e48354ceSNicholas Bellinger static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) 780e48354ceSNicholas Bellinger { 781f80e8ed3SNicholas Bellinger u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); 782e48354ceSNicholas Bellinger 783c0427f15SChristoph Hellwig iov_count += ISCSI_IOV_DATA_BUFFER; 784e48354ceSNicholas Bellinger 785e48354ceSNicholas Bellinger cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); 786e48354ceSNicholas Bellinger if (!cmd->iov_data) { 787e48354ceSNicholas Bellinger pr_err("Unable to allocate cmd->iov_data\n"); 788e48354ceSNicholas Bellinger return -ENOMEM; 789e48354ceSNicholas Bellinger } 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger cmd->orig_iov_data_count = iov_count; 792e48354ceSNicholas Bellinger return 0; 793e48354ceSNicholas Bellinger } 794e48354ceSNicholas Bellinger 795e48354ceSNicholas Bellinger static int iscsit_handle_scsi_cmd( 796e48354ceSNicholas Bellinger struct iscsi_conn *conn, 797e48354ceSNicholas Bellinger unsigned char *buf) 798e48354ceSNicholas Bellinger { 799de103c93SChristoph Hellwig int data_direction, payload_length, cmdsn_ret = 0, immed_ret; 800e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 801e48354ceSNicholas Bellinger struct iscsi_scsi_req *hdr; 802d28b1169SAndy Grover int iscsi_task_attr; 803d28b1169SAndy Grover int sam_task_attr; 804e48354ceSNicholas Bellinger 805e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 806e48354ceSNicholas Bellinger conn->sess->cmd_pdus++; 807e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 808e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 809e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->num_cmds++; 810e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 811e48354ceSNicholas Bellinger } 812e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 813e48354ceSNicholas Bellinger 814e48354ceSNicholas Bellinger hdr = (struct iscsi_scsi_req *) buf; 815e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 816e48354ceSNicholas Bellinger 817e48354ceSNicholas Bellinger /* FIXME; Add checks for AdditionalHeaderSegment */ 818e48354ceSNicholas Bellinger 819e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && 820e48354ceSNicholas Bellinger !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { 821e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" 822e48354ceSNicholas Bellinger " not set. Bad iSCSI Initiator.\n"); 823e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 824e48354ceSNicholas Bellinger buf, conn); 825e48354ceSNicholas Bellinger } 826e48354ceSNicholas Bellinger 827e48354ceSNicholas Bellinger if (((hdr->flags & ISCSI_FLAG_CMD_READ) || 828e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { 829e48354ceSNicholas Bellinger /* 830e48354ceSNicholas Bellinger * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) 831e48354ceSNicholas Bellinger * that adds support for RESERVE/RELEASE. There is a bug 832e48354ceSNicholas Bellinger * add with this new functionality that sets R/W bits when 833e48354ceSNicholas Bellinger * neither CDB carries any READ or WRITE datapayloads. 834e48354ceSNicholas Bellinger */ 835e48354ceSNicholas Bellinger if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { 836e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_READ; 837e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; 838e48354ceSNicholas Bellinger goto done; 839e48354ceSNicholas Bellinger } 840e48354ceSNicholas Bellinger 841e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" 842e48354ceSNicholas Bellinger " set when Expected Data Transfer Length is 0 for" 843e48354ceSNicholas Bellinger " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); 844e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 845e48354ceSNicholas Bellinger buf, conn); 846e48354ceSNicholas Bellinger } 847e48354ceSNicholas Bellinger done: 848e48354ceSNicholas Bellinger 849e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && 850e48354ceSNicholas Bellinger !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { 851e48354ceSNicholas Bellinger pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" 852e48354ceSNicholas Bellinger " MUST be set if Expected Data Transfer Length is not 0." 853e48354ceSNicholas Bellinger " Bad iSCSI Initiator\n"); 854e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 855e48354ceSNicholas Bellinger buf, conn); 856e48354ceSNicholas Bellinger } 857e48354ceSNicholas Bellinger 858e48354ceSNicholas Bellinger if ((hdr->flags & ISCSI_FLAG_CMD_READ) && 859e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { 860e48354ceSNicholas Bellinger pr_err("Bidirectional operations not supported!\n"); 861e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 862e48354ceSNicholas Bellinger buf, conn); 863e48354ceSNicholas Bellinger } 864e48354ceSNicholas Bellinger 865e48354ceSNicholas Bellinger if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 866e48354ceSNicholas Bellinger pr_err("Illegally set Immediate Bit in iSCSI Initiator" 867e48354ceSNicholas Bellinger " Scsi Command PDU.\n"); 868e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 869e48354ceSNicholas Bellinger buf, conn); 870e48354ceSNicholas Bellinger } 871e48354ceSNicholas Bellinger 872e48354ceSNicholas Bellinger if (payload_length && !conn->sess->sess_ops->ImmediateData) { 873e48354ceSNicholas Bellinger pr_err("ImmediateData=No but DataSegmentLength=%u," 874e48354ceSNicholas Bellinger " protocol error.\n", payload_length); 875e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 876e48354ceSNicholas Bellinger buf, conn); 877e48354ceSNicholas Bellinger } 878e48354ceSNicholas Bellinger 87950e5c87dSChristoph Hellwig if ((be32_to_cpu(hdr->data_length )== payload_length) && 880e48354ceSNicholas Bellinger (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { 881e48354ceSNicholas Bellinger pr_err("Expected Data Transfer Length and Length of" 882e48354ceSNicholas Bellinger " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" 883e48354ceSNicholas Bellinger " bit is not set protocol error\n"); 884e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 885e48354ceSNicholas Bellinger buf, conn); 886e48354ceSNicholas Bellinger } 887e48354ceSNicholas Bellinger 88850e5c87dSChristoph Hellwig if (payload_length > be32_to_cpu(hdr->data_length)) { 889e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 890e48354ceSNicholas Bellinger " EDTL: %u, protocol error.\n", payload_length, 891e48354ceSNicholas Bellinger hdr->data_length); 892e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 893e48354ceSNicholas Bellinger buf, conn); 894e48354ceSNicholas Bellinger } 895e48354ceSNicholas Bellinger 89621f5aa7eSNicholas Bellinger if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { 897e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 89821f5aa7eSNicholas Bellinger " MaxXmitDataSegmentLength: %u, protocol error.\n", 89921f5aa7eSNicholas Bellinger payload_length, conn->conn_ops->MaxXmitDataSegmentLength); 900e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 901e48354ceSNicholas Bellinger buf, conn); 902e48354ceSNicholas Bellinger } 903e48354ceSNicholas Bellinger 904e48354ceSNicholas Bellinger if (payload_length > conn->sess->sess_ops->FirstBurstLength) { 905e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 906e48354ceSNicholas Bellinger " FirstBurstLength: %u, protocol error.\n", 907e48354ceSNicholas Bellinger payload_length, conn->sess->sess_ops->FirstBurstLength); 908e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, 909e48354ceSNicholas Bellinger buf, conn); 910e48354ceSNicholas Bellinger } 911e48354ceSNicholas Bellinger 912e48354ceSNicholas Bellinger data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : 913e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : 914e48354ceSNicholas Bellinger DMA_NONE; 915e48354ceSNicholas Bellinger 916d28b1169SAndy Grover cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 917e48354ceSNicholas Bellinger if (!cmd) 918e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, 919e48354ceSNicholas Bellinger buf, conn); 920e48354ceSNicholas Bellinger 921d28b1169SAndy Grover cmd->data_direction = data_direction; 922d28b1169SAndy Grover iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; 923d28b1169SAndy Grover /* 924d28b1169SAndy Grover * Figure out the SAM Task Attribute for the incoming SCSI CDB 925d28b1169SAndy Grover */ 926d28b1169SAndy Grover if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || 927d28b1169SAndy Grover (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) 928d28b1169SAndy Grover sam_task_attr = MSG_SIMPLE_TAG; 929d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) 930d28b1169SAndy Grover sam_task_attr = MSG_ORDERED_TAG; 931d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) 932d28b1169SAndy Grover sam_task_attr = MSG_HEAD_TAG; 933d28b1169SAndy Grover else if (iscsi_task_attr == ISCSI_ATTR_ACA) 934d28b1169SAndy Grover sam_task_attr = MSG_ACA_TAG; 935d28b1169SAndy Grover else { 936d28b1169SAndy Grover pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" 937d28b1169SAndy Grover " MSG_SIMPLE_TAG\n", iscsi_task_attr); 938d28b1169SAndy Grover sam_task_attr = MSG_SIMPLE_TAG; 939d28b1169SAndy Grover } 940d28b1169SAndy Grover 941e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; 942e48354ceSNicholas Bellinger cmd->i_state = ISTATE_NEW_CMD; 943e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 944e48354ceSNicholas Bellinger cmd->immediate_data = (payload_length) ? 1 : 0; 945e48354ceSNicholas Bellinger cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && 946e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); 947e48354ceSNicholas Bellinger if (cmd->unsolicited_data) 948e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; 949e48354ceSNicholas Bellinger 950e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 951e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_READ) { 952e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 953e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 954e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == 0xFFFFFFFF) 955e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 956e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 957e48354ceSNicholas Bellinger } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) 958e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 95950e5c87dSChristoph Hellwig cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); 96050e5c87dSChristoph Hellwig cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); 961e48354ceSNicholas Bellinger cmd->first_burst_len = payload_length; 962e48354ceSNicholas Bellinger 963e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) { 964e48354ceSNicholas Bellinger struct iscsi_datain_req *dr; 965e48354ceSNicholas Bellinger 966e48354ceSNicholas Bellinger dr = iscsit_allocate_datain_req(); 967e48354ceSNicholas Bellinger if (!dr) 968e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 969e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 970e48354ceSNicholas Bellinger 1, 1, buf, cmd); 971e48354ceSNicholas Bellinger 972e48354ceSNicholas Bellinger iscsit_attach_datain_req(cmd, dr); 973e48354ceSNicholas Bellinger } 974e48354ceSNicholas Bellinger 975e48354ceSNicholas Bellinger /* 976065ca1e4SAndy Grover * Initialize struct se_cmd descriptor from target_core_mod infrastructure 977065ca1e4SAndy Grover */ 978065ca1e4SAndy Grover transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, 97950e5c87dSChristoph Hellwig conn->sess->se_sess, be32_to_cpu(hdr->data_length), 98050e5c87dSChristoph Hellwig cmd->data_direction, sam_task_attr, 98150e5c87dSChristoph Hellwig cmd->sense_buffer + 2); 982065ca1e4SAndy Grover 983065ca1e4SAndy Grover pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," 984065ca1e4SAndy Grover " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, 985065ca1e4SAndy Grover hdr->cmdsn, hdr->data_length, payload_length, conn->cid); 986065ca1e4SAndy Grover 987de103c93SChristoph Hellwig cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, 9884f26998aSAndy Grover scsilun_to_int(&hdr->lun)); 989de103c93SChristoph Hellwig if (cmd->sense_reason) 990e48354ceSNicholas Bellinger goto attach_cmd; 991a12f41f8SAndy Grover 992de103c93SChristoph Hellwig cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); 993de103c93SChristoph Hellwig if (cmd->sense_reason) { 994de103c93SChristoph Hellwig if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { 995e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 996e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 997e48354ceSNicholas Bellinger 1, 1, buf, cmd); 998de103c93SChristoph Hellwig } 999de103c93SChristoph Hellwig 1000de103c93SChristoph Hellwig goto attach_cmd; 1001de103c93SChristoph Hellwig } 1002de103c93SChristoph Hellwig 1003de103c93SChristoph Hellwig if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { 1004e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1005e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1006e48354ceSNicholas Bellinger 1, 1, buf, cmd); 1007e48354ceSNicholas Bellinger } 1008e48354ceSNicholas Bellinger 1009e48354ceSNicholas Bellinger attach_cmd: 1010e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 10112fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1012e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1013e48354ceSNicholas Bellinger /* 1014e48354ceSNicholas Bellinger * Check if we need to delay processing because of ALUA 1015e48354ceSNicholas Bellinger * Active/NonOptimized primary access state.. 1016e48354ceSNicholas Bellinger */ 1017e48354ceSNicholas Bellinger core_alua_check_nonop_delay(&cmd->se_cmd); 1018bfb79eacSAndy Grover 1019de103c93SChristoph Hellwig if (iscsit_allocate_iovecs(cmd) < 0) { 1020e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1021e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1022cd931ee6SNicholas Bellinger 1, 0, buf, cmd); 1023de103c93SChristoph Hellwig } 1024de103c93SChristoph Hellwig 1025e48354ceSNicholas Bellinger /* 1026e48354ceSNicholas Bellinger * Check the CmdSN against ExpCmdSN/MaxCmdSN here if 1027e48354ceSNicholas Bellinger * the Immediate Bit is not set, and no Immediate 1028e48354ceSNicholas Bellinger * Data is attached. 1029e48354ceSNicholas Bellinger * 1030e48354ceSNicholas Bellinger * A PDU/CmdSN carrying Immediate Data can only 1031e48354ceSNicholas Bellinger * be processed after the DataCRC has passed. 1032e48354ceSNicholas Bellinger * If the DataCRC fails, the CmdSN MUST NOT 1033e48354ceSNicholas Bellinger * be acknowledged. (See below) 1034e48354ceSNicholas Bellinger */ 1035e48354ceSNicholas Bellinger if (!cmd->immediate_data) { 1036e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 10377e32da55SNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) 10387e32da55SNicholas Bellinger return 0; 10397e32da55SNicholas Bellinger else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1040e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1041e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1042e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1043e48354ceSNicholas Bellinger } 1044e48354ceSNicholas Bellinger 104550e5c87dSChristoph Hellwig iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); 1046e48354ceSNicholas Bellinger 1047e48354ceSNicholas Bellinger /* 1048e48354ceSNicholas Bellinger * If no Immediate Data is attached, it's OK to return now. 1049e48354ceSNicholas Bellinger */ 1050e48354ceSNicholas Bellinger if (!cmd->immediate_data) { 1051de103c93SChristoph Hellwig if (!cmd->sense_reason && cmd->unsolicited_data) { 1052e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 1053e48354ceSNicholas Bellinger 1054e48354ceSNicholas Bellinger spin_lock_bh(&cmd->dataout_timeout_lock); 1055e48354ceSNicholas Bellinger iscsit_start_dataout_timer(cmd, cmd->conn); 1056e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->dataout_timeout_lock); 1057e48354ceSNicholas Bellinger } 1058e48354ceSNicholas Bellinger 1059e48354ceSNicholas Bellinger return 0; 1060e48354ceSNicholas Bellinger } 1061e48354ceSNicholas Bellinger 1062e48354ceSNicholas Bellinger /* 1063e48354ceSNicholas Bellinger * Early CHECK_CONDITIONs never make it to the transport processing 1064e48354ceSNicholas Bellinger * thread. They are processed in CmdSN order by 1065e48354ceSNicholas Bellinger * iscsit_check_received_cmdsn() below. 1066e48354ceSNicholas Bellinger */ 1067de103c93SChristoph Hellwig if (cmd->sense_reason) { 1068e48354ceSNicholas Bellinger immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; 1069e48354ceSNicholas Bellinger goto after_immediate_data; 1070e48354ceSNicholas Bellinger } 1071e48354ceSNicholas Bellinger /* 1072e48354ceSNicholas Bellinger * Call directly into transport_generic_new_cmd() to perform 1073e48354ceSNicholas Bellinger * the backend memory allocation. 1074e48354ceSNicholas Bellinger */ 1075de103c93SChristoph Hellwig cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); 1076de103c93SChristoph Hellwig if (cmd->sense_reason) { 1077e48354ceSNicholas Bellinger immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; 1078e48354ceSNicholas Bellinger goto after_immediate_data; 1079e48354ceSNicholas Bellinger } 1080e48354ceSNicholas Bellinger 1081e48354ceSNicholas Bellinger immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length); 1082e48354ceSNicholas Bellinger after_immediate_data: 1083e48354ceSNicholas Bellinger if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { 1084e48354ceSNicholas Bellinger /* 1085e48354ceSNicholas Bellinger * A PDU/CmdSN carrying Immediate Data passed 1086e48354ceSNicholas Bellinger * DataCRC, check against ExpCmdSN/MaxCmdSN if 1087e48354ceSNicholas Bellinger * Immediate Bit is not set. 1088e48354ceSNicholas Bellinger */ 1089e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1090e48354ceSNicholas Bellinger /* 1091e48354ceSNicholas Bellinger * Special case for Unsupported SAM WRITE Opcodes 1092e48354ceSNicholas Bellinger * and ImmediateData=Yes. 1093e48354ceSNicholas Bellinger */ 1094de103c93SChristoph Hellwig if (cmd->sense_reason) { 1095e48354ceSNicholas Bellinger if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) 1096e48354ceSNicholas Bellinger return -1; 1097e48354ceSNicholas Bellinger } else if (cmd->unsolicited_data) { 1098e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 1099e48354ceSNicholas Bellinger 1100e48354ceSNicholas Bellinger spin_lock_bh(&cmd->dataout_timeout_lock); 1101e48354ceSNicholas Bellinger iscsit_start_dataout_timer(cmd, cmd->conn); 1102e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->dataout_timeout_lock); 1103e48354ceSNicholas Bellinger } 1104e48354ceSNicholas Bellinger 1105e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1106e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1107e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1108e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1109e48354ceSNicholas Bellinger 1110e48354ceSNicholas Bellinger } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { 1111e48354ceSNicholas Bellinger /* 1112e48354ceSNicholas Bellinger * Immediate Data failed DataCRC and ERL>=1, 1113e48354ceSNicholas Bellinger * silently drop this PDU and let the initiator 1114e48354ceSNicholas Bellinger * plug the CmdSN gap. 1115e48354ceSNicholas Bellinger * 1116e48354ceSNicholas Bellinger * FIXME: Send Unsolicited NOPIN with reserved 1117e48354ceSNicholas Bellinger * TTT here to help the initiator figure out 1118e48354ceSNicholas Bellinger * the missing CmdSN, although they should be 1119e48354ceSNicholas Bellinger * intelligent enough to determine the missing 1120e48354ceSNicholas Bellinger * CmdSN and issue a retry to plug the sequence. 1121e48354ceSNicholas Bellinger */ 1122e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 1123e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 1124e48354ceSNicholas Bellinger } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ 1125e48354ceSNicholas Bellinger return -1; 1126e48354ceSNicholas Bellinger 1127e48354ceSNicholas Bellinger return 0; 1128e48354ceSNicholas Bellinger } 1129e48354ceSNicholas Bellinger 1130e48354ceSNicholas Bellinger static u32 iscsit_do_crypto_hash_sg( 1131e48354ceSNicholas Bellinger struct hash_desc *hash, 1132e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1133e48354ceSNicholas Bellinger u32 data_offset, 1134e48354ceSNicholas Bellinger u32 data_length, 1135e48354ceSNicholas Bellinger u32 padding, 1136e48354ceSNicholas Bellinger u8 *pad_bytes) 1137e48354ceSNicholas Bellinger { 1138e48354ceSNicholas Bellinger u32 data_crc; 1139e48354ceSNicholas Bellinger u32 i; 1140e48354ceSNicholas Bellinger struct scatterlist *sg; 1141e48354ceSNicholas Bellinger unsigned int page_off; 1142e48354ceSNicholas Bellinger 1143e48354ceSNicholas Bellinger crypto_hash_init(hash); 1144e48354ceSNicholas Bellinger 1145e48354ceSNicholas Bellinger sg = cmd->first_data_sg; 1146e48354ceSNicholas Bellinger page_off = cmd->first_data_sg_off; 1147e48354ceSNicholas Bellinger 1148e48354ceSNicholas Bellinger i = 0; 1149e48354ceSNicholas Bellinger while (data_length) { 1150e48354ceSNicholas Bellinger u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); 1151e48354ceSNicholas Bellinger 1152e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg[i], cur_len); 1153e48354ceSNicholas Bellinger 1154e48354ceSNicholas Bellinger data_length -= cur_len; 1155e48354ceSNicholas Bellinger page_off = 0; 1156e48354ceSNicholas Bellinger i++; 1157e48354ceSNicholas Bellinger } 1158e48354ceSNicholas Bellinger 1159e48354ceSNicholas Bellinger if (padding) { 1160e48354ceSNicholas Bellinger struct scatterlist pad_sg; 1161e48354ceSNicholas Bellinger 1162e48354ceSNicholas Bellinger sg_init_one(&pad_sg, pad_bytes, padding); 1163e48354ceSNicholas Bellinger crypto_hash_update(hash, &pad_sg, padding); 1164e48354ceSNicholas Bellinger } 1165e48354ceSNicholas Bellinger crypto_hash_final(hash, (u8 *) &data_crc); 1166e48354ceSNicholas Bellinger 1167e48354ceSNicholas Bellinger return data_crc; 1168e48354ceSNicholas Bellinger } 1169e48354ceSNicholas Bellinger 1170e48354ceSNicholas Bellinger static void iscsit_do_crypto_hash_buf( 1171e48354ceSNicholas Bellinger struct hash_desc *hash, 1172e48354ceSNicholas Bellinger unsigned char *buf, 1173e48354ceSNicholas Bellinger u32 payload_length, 1174e48354ceSNicholas Bellinger u32 padding, 1175e48354ceSNicholas Bellinger u8 *pad_bytes, 1176e48354ceSNicholas Bellinger u8 *data_crc) 1177e48354ceSNicholas Bellinger { 1178e48354ceSNicholas Bellinger struct scatterlist sg; 1179e48354ceSNicholas Bellinger 1180e48354ceSNicholas Bellinger crypto_hash_init(hash); 1181e48354ceSNicholas Bellinger 11828359cf43SJörn Engel sg_init_one(&sg, buf, payload_length); 1183e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg, payload_length); 1184e48354ceSNicholas Bellinger 1185e48354ceSNicholas Bellinger if (padding) { 1186e48354ceSNicholas Bellinger sg_init_one(&sg, pad_bytes, padding); 1187e48354ceSNicholas Bellinger crypto_hash_update(hash, &sg, padding); 1188e48354ceSNicholas Bellinger } 1189e48354ceSNicholas Bellinger crypto_hash_final(hash, data_crc); 1190e48354ceSNicholas Bellinger } 1191e48354ceSNicholas Bellinger 1192e48354ceSNicholas Bellinger static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) 1193e48354ceSNicholas Bellinger { 1194e48354ceSNicholas Bellinger int iov_ret, ooo_cmdsn = 0, ret; 1195e48354ceSNicholas Bellinger u8 data_crc_failed = 0; 1196e48354ceSNicholas Bellinger u32 checksum, iov_count = 0, padding = 0, rx_got = 0; 1197e48354ceSNicholas Bellinger u32 rx_size = 0, payload_length; 1198e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1199e48354ceSNicholas Bellinger struct se_cmd *se_cmd; 1200e48354ceSNicholas Bellinger struct iscsi_data *hdr; 1201e48354ceSNicholas Bellinger struct kvec *iov; 1202e48354ceSNicholas Bellinger unsigned long flags; 1203e48354ceSNicholas Bellinger 1204e48354ceSNicholas Bellinger hdr = (struct iscsi_data *) buf; 1205e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1206e48354ceSNicholas Bellinger 1207e48354ceSNicholas Bellinger if (!payload_length) { 1208e48354ceSNicholas Bellinger pr_err("DataOUT payload is ZERO, protocol error.\n"); 1209e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1210e48354ceSNicholas Bellinger buf, conn); 1211e48354ceSNicholas Bellinger } 1212e48354ceSNicholas Bellinger 1213e48354ceSNicholas Bellinger /* iSCSI write */ 1214e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 1215e48354ceSNicholas Bellinger conn->sess->rx_data_octets += payload_length; 1216e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 1217e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 1218e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->write_bytes += payload_length; 1219e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 1220e48354ceSNicholas Bellinger } 1221e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 1222e48354ceSNicholas Bellinger 122321f5aa7eSNicholas Bellinger if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { 1224e48354ceSNicholas Bellinger pr_err("DataSegmentLength: %u is greater than" 122521f5aa7eSNicholas Bellinger " MaxXmitDataSegmentLength: %u\n", payload_length, 122621f5aa7eSNicholas Bellinger conn->conn_ops->MaxXmitDataSegmentLength); 1227e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1228e48354ceSNicholas Bellinger buf, conn); 1229e48354ceSNicholas Bellinger } 1230e48354ceSNicholas Bellinger 1231e48354ceSNicholas Bellinger cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, 1232e48354ceSNicholas Bellinger payload_length); 1233e48354ceSNicholas Bellinger if (!cmd) 1234e48354ceSNicholas Bellinger return 0; 1235e48354ceSNicholas Bellinger 1236e48354ceSNicholas Bellinger pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," 1237e48354ceSNicholas Bellinger " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", 1238e48354ceSNicholas Bellinger hdr->itt, hdr->ttt, hdr->datasn, hdr->offset, 1239e48354ceSNicholas Bellinger payload_length, conn->cid); 1240e48354ceSNicholas Bellinger 1241e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { 1242e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x received DataOUT after" 1243e48354ceSNicholas Bellinger " last DataOUT received, dumping payload\n", 1244e48354ceSNicholas Bellinger cmd->init_task_tag); 1245e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1246e48354ceSNicholas Bellinger } 1247e48354ceSNicholas Bellinger 1248e48354ceSNicholas Bellinger if (cmd->data_direction != DMA_TO_DEVICE) { 1249e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x received DataOUT for a" 1250e48354ceSNicholas Bellinger " NON-WRITE command.\n", cmd->init_task_tag); 1251e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, 1252e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1253e48354ceSNicholas Bellinger } 1254e48354ceSNicholas Bellinger se_cmd = &cmd->se_cmd; 1255e48354ceSNicholas Bellinger iscsit_mod_dataout_timer(cmd); 1256e48354ceSNicholas Bellinger 125750e5c87dSChristoph Hellwig if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { 1258e48354ceSNicholas Bellinger pr_err("DataOut Offset: %u, Length %u greater than" 1259e48354ceSNicholas Bellinger " iSCSI Command EDTL %u, protocol error.\n", 1260ebf1d95cSAndy Grover hdr->offset, payload_length, cmd->se_cmd.data_length); 1261e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, 1262e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1263e48354ceSNicholas Bellinger } 1264e48354ceSNicholas Bellinger 1265e48354ceSNicholas Bellinger if (cmd->unsolicited_data) { 1266e48354ceSNicholas Bellinger int dump_unsolicited_data = 0; 1267e48354ceSNicholas Bellinger 1268e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 1269e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 1270e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 1271e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(&cmd->se_cmd, 1272e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 1273e48354ceSNicholas Bellinger return -1; 1274e48354ceSNicholas Bellinger } 1275e48354ceSNicholas Bellinger /* 1276e48354ceSNicholas Bellinger * Special case for dealing with Unsolicited DataOUT 1277e48354ceSNicholas Bellinger * and Unsupported SAM WRITE Opcodes and SE resource allocation 1278e48354ceSNicholas Bellinger * failures; 1279e48354ceSNicholas Bellinger */ 1280e48354ceSNicholas Bellinger 1281e48354ceSNicholas Bellinger /* Something's amiss if we're not in WRITE_PENDING state... */ 1282e48354ceSNicholas Bellinger spin_lock_irqsave(&se_cmd->t_state_lock, flags); 1283e48354ceSNicholas Bellinger WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); 1284e48354ceSNicholas Bellinger spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 1285e48354ceSNicholas Bellinger 1286e48354ceSNicholas Bellinger spin_lock_irqsave(&se_cmd->t_state_lock, flags); 1287de103c93SChristoph Hellwig if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) 1288e48354ceSNicholas Bellinger dump_unsolicited_data = 1; 1289e48354ceSNicholas Bellinger spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 1290e48354ceSNicholas Bellinger 1291e48354ceSNicholas Bellinger if (dump_unsolicited_data) { 1292e48354ceSNicholas Bellinger /* 1293e48354ceSNicholas Bellinger * Check if a delayed TASK_ABORTED status needs to 1294e48354ceSNicholas Bellinger * be sent now if the ISCSI_FLAG_CMD_FINAL has been 1295e48354ceSNicholas Bellinger * received with the unsolicitied data out. 1296e48354ceSNicholas Bellinger */ 1297e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_FINAL) 1298e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1299e48354ceSNicholas Bellinger 1300e48354ceSNicholas Bellinger transport_check_aborted_status(se_cmd, 1301e48354ceSNicholas Bellinger (hdr->flags & ISCSI_FLAG_CMD_FINAL)); 1302e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1303e48354ceSNicholas Bellinger } 1304e48354ceSNicholas Bellinger } else { 1305e48354ceSNicholas Bellinger /* 1306e48354ceSNicholas Bellinger * For the normal solicited data path: 1307e48354ceSNicholas Bellinger * 1308e48354ceSNicholas Bellinger * Check for a delayed TASK_ABORTED status and dump any 1309e48354ceSNicholas Bellinger * incoming data out payload if one exists. Also, when the 1310e48354ceSNicholas Bellinger * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current 1311e48354ceSNicholas Bellinger * data out sequence, we decrement outstanding_r2ts. Once 1312e48354ceSNicholas Bellinger * outstanding_r2ts reaches zero, go ahead and send the delayed 1313e48354ceSNicholas Bellinger * TASK_ABORTED status. 1314e48354ceSNicholas Bellinger */ 13157d680f3bSChristoph Hellwig if (se_cmd->transport_state & CMD_T_ABORTED) { 1316e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_CMD_FINAL) 1317e48354ceSNicholas Bellinger if (--cmd->outstanding_r2ts < 1) { 1318e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1319e48354ceSNicholas Bellinger transport_check_aborted_status( 1320e48354ceSNicholas Bellinger se_cmd, 1); 1321e48354ceSNicholas Bellinger } 1322e48354ceSNicholas Bellinger 1323e48354ceSNicholas Bellinger return iscsit_dump_data_payload(conn, payload_length, 1); 1324e48354ceSNicholas Bellinger } 1325e48354ceSNicholas Bellinger } 1326e48354ceSNicholas Bellinger /* 1327e48354ceSNicholas Bellinger * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and 1328e48354ceSNicholas Bellinger * within-command recovery checks before receiving the payload. 1329e48354ceSNicholas Bellinger */ 1330e48354ceSNicholas Bellinger ret = iscsit_check_pre_dataout(cmd, buf); 1331e48354ceSNicholas Bellinger if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY) 1332e48354ceSNicholas Bellinger return 0; 1333e48354ceSNicholas Bellinger else if (ret == DATAOUT_CANNOT_RECOVER) 1334e48354ceSNicholas Bellinger return -1; 1335e48354ceSNicholas Bellinger 1336e48354ceSNicholas Bellinger rx_size += payload_length; 1337e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1338e48354ceSNicholas Bellinger 133950e5c87dSChristoph Hellwig iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), 134050e5c87dSChristoph Hellwig payload_length); 1341e48354ceSNicholas Bellinger if (iov_ret < 0) 1342e48354ceSNicholas Bellinger return -1; 1343e48354ceSNicholas Bellinger 1344e48354ceSNicholas Bellinger iov_count += iov_ret; 1345e48354ceSNicholas Bellinger 1346e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1347e48354ceSNicholas Bellinger if (padding != 0) { 1348e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 1349e48354ceSNicholas Bellinger iov[iov_count++].iov_len = padding; 1350e48354ceSNicholas Bellinger rx_size += padding; 1351e48354ceSNicholas Bellinger pr_debug("Receiving %u padding bytes.\n", padding); 1352e48354ceSNicholas Bellinger } 1353e48354ceSNicholas Bellinger 1354e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1355e48354ceSNicholas Bellinger iov[iov_count].iov_base = &checksum; 1356e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 1357e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1358e48354ceSNicholas Bellinger } 1359e48354ceSNicholas Bellinger 1360e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 1363e48354ceSNicholas Bellinger 1364e48354ceSNicholas Bellinger if (rx_got != rx_size) 1365e48354ceSNicholas Bellinger return -1; 1366e48354ceSNicholas Bellinger 1367e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1368e48354ceSNicholas Bellinger u32 data_crc; 1369e48354ceSNicholas Bellinger 1370e48354ceSNicholas Bellinger data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, 137150e5c87dSChristoph Hellwig be32_to_cpu(hdr->offset), 137250e5c87dSChristoph Hellwig payload_length, padding, 1373e48354ceSNicholas Bellinger cmd->pad_bytes); 1374e48354ceSNicholas Bellinger 1375e48354ceSNicholas Bellinger if (checksum != data_crc) { 1376e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x, Offset: %u, Length: %u," 1377e48354ceSNicholas Bellinger " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" 1378e48354ceSNicholas Bellinger " does not match computed 0x%08x\n", 1379e48354ceSNicholas Bellinger hdr->itt, hdr->offset, payload_length, 1380e48354ceSNicholas Bellinger hdr->datasn, checksum, data_crc); 1381e48354ceSNicholas Bellinger data_crc_failed = 1; 1382e48354ceSNicholas Bellinger } else { 1383e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest 0x%08x for" 1384e48354ceSNicholas Bellinger " %u bytes of Data Out\n", checksum, 1385e48354ceSNicholas Bellinger payload_length); 1386e48354ceSNicholas Bellinger } 1387e48354ceSNicholas Bellinger } 1388e48354ceSNicholas Bellinger /* 1389e48354ceSNicholas Bellinger * Increment post receive data and CRC values or perform 1390e48354ceSNicholas Bellinger * within-command recovery. 1391e48354ceSNicholas Bellinger */ 1392e48354ceSNicholas Bellinger ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed); 1393e48354ceSNicholas Bellinger if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)) 1394e48354ceSNicholas Bellinger return 0; 1395e48354ceSNicholas Bellinger else if (ret == DATAOUT_SEND_R2T) { 1396e48354ceSNicholas Bellinger iscsit_set_dataout_sequence_values(cmd); 13978b1e1244SAndy Grover iscsit_build_r2ts_for_cmd(cmd, conn, false); 1398e48354ceSNicholas Bellinger } else if (ret == DATAOUT_SEND_TO_TRANSPORT) { 1399e48354ceSNicholas Bellinger /* 1400e48354ceSNicholas Bellinger * Handle extra special case for out of order 1401e48354ceSNicholas Bellinger * Unsolicited Data Out. 1402e48354ceSNicholas Bellinger */ 1403e48354ceSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1404e48354ceSNicholas Bellinger ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); 1405e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1406e48354ceSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1407e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1408e48354ceSNicholas Bellinger 1409e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 141067441b68SChristoph Hellwig if (ooo_cmdsn) 141167441b68SChristoph Hellwig return 0; 141267441b68SChristoph Hellwig target_execute_cmd(&cmd->se_cmd); 141367441b68SChristoph Hellwig return 0; 1414e48354ceSNicholas Bellinger } else /* DATAOUT_CANNOT_RECOVER */ 1415e48354ceSNicholas Bellinger return -1; 1416e48354ceSNicholas Bellinger 1417e48354ceSNicholas Bellinger return 0; 1418e48354ceSNicholas Bellinger } 1419e48354ceSNicholas Bellinger 1420e48354ceSNicholas Bellinger static int iscsit_handle_nop_out( 1421e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1422e48354ceSNicholas Bellinger unsigned char *buf) 1423e48354ceSNicholas Bellinger { 1424e48354ceSNicholas Bellinger unsigned char *ping_data = NULL; 1425e48354ceSNicholas Bellinger int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; 1426e48354ceSNicholas Bellinger u32 checksum, data_crc, padding = 0, payload_length; 1427e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1428e48354ceSNicholas Bellinger struct kvec *iov = NULL; 1429e48354ceSNicholas Bellinger struct iscsi_nopout *hdr; 1430e48354ceSNicholas Bellinger 1431e48354ceSNicholas Bellinger hdr = (struct iscsi_nopout *) buf; 1432e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1433e48354ceSNicholas Bellinger 143466c7db68SChristoph Hellwig if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1435e48354ceSNicholas Bellinger pr_err("NOPOUT ITT is reserved, but Immediate Bit is" 1436e48354ceSNicholas Bellinger " not set, protocol error.\n"); 1437e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1438e48354ceSNicholas Bellinger buf, conn); 1439e48354ceSNicholas Bellinger } 1440e48354ceSNicholas Bellinger 144121f5aa7eSNicholas Bellinger if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { 1442e48354ceSNicholas Bellinger pr_err("NOPOUT Ping Data DataSegmentLength: %u is" 144321f5aa7eSNicholas Bellinger " greater than MaxXmitDataSegmentLength: %u, protocol" 1444e48354ceSNicholas Bellinger " error.\n", payload_length, 144521f5aa7eSNicholas Bellinger conn->conn_ops->MaxXmitDataSegmentLength); 1446e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1447e48354ceSNicholas Bellinger buf, conn); 1448e48354ceSNicholas Bellinger } 1449e48354ceSNicholas Bellinger 1450e48354ceSNicholas Bellinger pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x," 1451e48354ceSNicholas Bellinger " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", 145266c7db68SChristoph Hellwig hdr->itt == RESERVED_ITT ? "Response" : "Request", 1453e48354ceSNicholas Bellinger hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, 1454e48354ceSNicholas Bellinger payload_length); 1455e48354ceSNicholas Bellinger /* 1456e48354ceSNicholas Bellinger * This is not a response to a Unsolicited NopIN, which means 1457e48354ceSNicholas Bellinger * it can either be a NOPOUT ping request (with a valid ITT), 1458e48354ceSNicholas Bellinger * or a NOPOUT not requesting a NOPIN (with a reserved ITT). 1459e48354ceSNicholas Bellinger * Either way, make sure we allocate an struct iscsi_cmd, as both 1460e48354ceSNicholas Bellinger * can contain ping data. 1461e48354ceSNicholas Bellinger */ 146250e5c87dSChristoph Hellwig if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { 1463e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1464e48354ceSNicholas Bellinger if (!cmd) 1465e48354ceSNicholas Bellinger return iscsit_add_reject( 1466e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1467e48354ceSNicholas Bellinger 1, buf, conn); 1468e48354ceSNicholas Bellinger 1469e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; 1470e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_NOPIN; 1471e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1472e48354ceSNicholas Bellinger 1 : 0); 1473e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 1474e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 147550e5c87dSChristoph Hellwig cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); 147650e5c87dSChristoph Hellwig cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); 1477e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 1478e48354ceSNicholas Bellinger } 1479e48354ceSNicholas Bellinger 148050e5c87dSChristoph Hellwig if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { 1481e48354ceSNicholas Bellinger rx_size = payload_length; 1482e48354ceSNicholas Bellinger ping_data = kzalloc(payload_length + 1, GFP_KERNEL); 1483e48354ceSNicholas Bellinger if (!ping_data) { 1484e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 1485e48354ceSNicholas Bellinger " NOPOUT ping data.\n"); 1486e48354ceSNicholas Bellinger ret = -1; 1487e48354ceSNicholas Bellinger goto out; 1488e48354ceSNicholas Bellinger } 1489e48354ceSNicholas Bellinger 1490e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1491e48354ceSNicholas Bellinger iov[niov].iov_base = ping_data; 1492e48354ceSNicholas Bellinger iov[niov++].iov_len = payload_length; 1493e48354ceSNicholas Bellinger 1494e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1495e48354ceSNicholas Bellinger if (padding != 0) { 1496e48354ceSNicholas Bellinger pr_debug("Receiving %u additional bytes" 1497e48354ceSNicholas Bellinger " for padding.\n", padding); 1498e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->pad_bytes; 1499e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 1500e48354ceSNicholas Bellinger rx_size += padding; 1501e48354ceSNicholas Bellinger } 1502e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1503e48354ceSNicholas Bellinger iov[niov].iov_base = &checksum; 1504e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 1505e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1506e48354ceSNicholas Bellinger } 1507e48354ceSNicholas Bellinger 1508e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); 1509e48354ceSNicholas Bellinger if (rx_got != rx_size) { 1510e48354ceSNicholas Bellinger ret = -1; 1511e48354ceSNicholas Bellinger goto out; 1512e48354ceSNicholas Bellinger } 1513e48354ceSNicholas Bellinger 1514e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1515e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 1516e48354ceSNicholas Bellinger ping_data, payload_length, 1517e48354ceSNicholas Bellinger padding, cmd->pad_bytes, 1518e48354ceSNicholas Bellinger (u8 *)&data_crc); 1519e48354ceSNicholas Bellinger 1520e48354ceSNicholas Bellinger if (checksum != data_crc) { 1521e48354ceSNicholas Bellinger pr_err("Ping data CRC32C DataDigest" 1522e48354ceSNicholas Bellinger " 0x%08x does not match computed 0x%08x\n", 1523e48354ceSNicholas Bellinger checksum, data_crc); 1524e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 1525e48354ceSNicholas Bellinger pr_err("Unable to recover from" 1526e48354ceSNicholas Bellinger " NOPOUT Ping DataCRC failure while in" 1527e48354ceSNicholas Bellinger " ERL=0.\n"); 1528e48354ceSNicholas Bellinger ret = -1; 1529e48354ceSNicholas Bellinger goto out; 1530e48354ceSNicholas Bellinger } else { 1531e48354ceSNicholas Bellinger /* 1532e48354ceSNicholas Bellinger * Silently drop this PDU and let the 1533e48354ceSNicholas Bellinger * initiator plug the CmdSN gap. 1534e48354ceSNicholas Bellinger */ 1535e48354ceSNicholas Bellinger pr_debug("Dropping NOPOUT" 1536e48354ceSNicholas Bellinger " Command CmdSN: 0x%08x due to" 1537e48354ceSNicholas Bellinger " DataCRC error.\n", hdr->cmdsn); 1538e48354ceSNicholas Bellinger ret = 0; 1539e48354ceSNicholas Bellinger goto out; 1540e48354ceSNicholas Bellinger } 1541e48354ceSNicholas Bellinger } else { 1542e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest" 1543e48354ceSNicholas Bellinger " 0x%08x for %u bytes of ping data.\n", 1544e48354ceSNicholas Bellinger checksum, payload_length); 1545e48354ceSNicholas Bellinger } 1546e48354ceSNicholas Bellinger } 1547e48354ceSNicholas Bellinger 1548e48354ceSNicholas Bellinger ping_data[payload_length] = '\0'; 1549e48354ceSNicholas Bellinger /* 1550e48354ceSNicholas Bellinger * Attach ping data to struct iscsi_cmd->buf_ptr. 1551e48354ceSNicholas Bellinger */ 15528359cf43SJörn Engel cmd->buf_ptr = ping_data; 1553e48354ceSNicholas Bellinger cmd->buf_ptr_size = payload_length; 1554e48354ceSNicholas Bellinger 1555e48354ceSNicholas Bellinger pr_debug("Got %u bytes of NOPOUT ping" 1556e48354ceSNicholas Bellinger " data.\n", payload_length); 1557e48354ceSNicholas Bellinger pr_debug("Ping Data: \"%s\"\n", ping_data); 1558e48354ceSNicholas Bellinger } 1559e48354ceSNicholas Bellinger 156066c7db68SChristoph Hellwig if (hdr->itt != RESERVED_ITT) { 1561e48354ceSNicholas Bellinger if (!cmd) { 1562e48354ceSNicholas Bellinger pr_err("Checking CmdSN for NOPOUT," 1563e48354ceSNicholas Bellinger " but cmd is NULL!\n"); 1564e48354ceSNicholas Bellinger return -1; 1565e48354ceSNicholas Bellinger } 1566e48354ceSNicholas Bellinger /* 1567e48354ceSNicholas Bellinger * Initiator is expecting a NopIN ping reply, 1568e48354ceSNicholas Bellinger */ 1569e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 15702fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1571e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1572e48354ceSNicholas Bellinger 157350e5c87dSChristoph Hellwig iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); 1574e48354ceSNicholas Bellinger 1575e48354ceSNicholas Bellinger if (hdr->opcode & ISCSI_OP_IMMEDIATE) { 1576e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, 1577e48354ceSNicholas Bellinger cmd->i_state); 1578e48354ceSNicholas Bellinger return 0; 1579e48354ceSNicholas Bellinger } 1580e48354ceSNicholas Bellinger 1581e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1582e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { 1583e48354ceSNicholas Bellinger ret = 0; 1584e48354ceSNicholas Bellinger goto ping_out; 1585e48354ceSNicholas Bellinger } 1586e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1587e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1588e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1589e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1590e48354ceSNicholas Bellinger 1591e48354ceSNicholas Bellinger return 0; 1592e48354ceSNicholas Bellinger } 1593e48354ceSNicholas Bellinger 159450e5c87dSChristoph Hellwig if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { 1595e48354ceSNicholas Bellinger /* 1596e48354ceSNicholas Bellinger * This was a response to a unsolicited NOPIN ping. 1597e48354ceSNicholas Bellinger */ 159850e5c87dSChristoph Hellwig cmd = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); 1599e48354ceSNicholas Bellinger if (!cmd) 1600e48354ceSNicholas Bellinger return -1; 1601e48354ceSNicholas Bellinger 1602e48354ceSNicholas Bellinger iscsit_stop_nopin_response_timer(conn); 1603e48354ceSNicholas Bellinger 1604e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 1605e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 1606e48354ceSNicholas Bellinger iscsit_start_nopin_timer(conn); 1607e48354ceSNicholas Bellinger } else { 1608e48354ceSNicholas Bellinger /* 1609e48354ceSNicholas Bellinger * Initiator is not expecting a NOPIN is response. 1610e48354ceSNicholas Bellinger * Just ignore for now. 1611e48354ceSNicholas Bellinger * 1612e48354ceSNicholas Bellinger * iSCSI v19-91 10.18 1613e48354ceSNicholas Bellinger * "A NOP-OUT may also be used to confirm a changed 1614e48354ceSNicholas Bellinger * ExpStatSN if another PDU will not be available 1615e48354ceSNicholas Bellinger * for a long time." 1616e48354ceSNicholas Bellinger */ 1617e48354ceSNicholas Bellinger ret = 0; 1618e48354ceSNicholas Bellinger goto out; 1619e48354ceSNicholas Bellinger } 1620e48354ceSNicholas Bellinger 1621e48354ceSNicholas Bellinger return 0; 1622e48354ceSNicholas Bellinger out: 1623e48354ceSNicholas Bellinger if (cmd) 1624e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 1625e48354ceSNicholas Bellinger ping_out: 1626e48354ceSNicholas Bellinger kfree(ping_data); 1627e48354ceSNicholas Bellinger return ret; 1628e48354ceSNicholas Bellinger } 1629e48354ceSNicholas Bellinger 1630e48354ceSNicholas Bellinger static int iscsit_handle_task_mgt_cmd( 1631e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1632e48354ceSNicholas Bellinger unsigned char *buf) 1633e48354ceSNicholas Bellinger { 1634e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 1635e48354ceSNicholas Bellinger struct se_tmr_req *se_tmr; 1636e48354ceSNicholas Bellinger struct iscsi_tmr_req *tmr_req; 1637e48354ceSNicholas Bellinger struct iscsi_tm *hdr; 1638e48354ceSNicholas Bellinger int out_of_order_cmdsn = 0; 1639e48354ceSNicholas Bellinger int ret; 1640e48354ceSNicholas Bellinger u8 function; 1641e48354ceSNicholas Bellinger 1642e48354ceSNicholas Bellinger hdr = (struct iscsi_tm *) buf; 1643e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; 1644e48354ceSNicholas Bellinger function = hdr->flags; 1645e48354ceSNicholas Bellinger 1646e48354ceSNicholas Bellinger pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" 1647e48354ceSNicholas Bellinger " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" 1648e48354ceSNicholas Bellinger " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, 1649e48354ceSNicholas Bellinger hdr->rtt, hdr->refcmdsn, conn->cid); 1650e48354ceSNicholas Bellinger 1651e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_ABORT_TASK) && 1652e48354ceSNicholas Bellinger ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && 165366c7db68SChristoph Hellwig hdr->rtt != RESERVED_ITT)) { 1654e48354ceSNicholas Bellinger pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); 165566c7db68SChristoph Hellwig hdr->rtt = RESERVED_ITT; 1656e48354ceSNicholas Bellinger } 1657e48354ceSNicholas Bellinger 1658e48354ceSNicholas Bellinger if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && 1659e48354ceSNicholas Bellinger !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1660e48354ceSNicholas Bellinger pr_err("Task Management Request TASK_REASSIGN not" 1661e48354ceSNicholas Bellinger " issued as immediate command, bad iSCSI Initiator" 1662e48354ceSNicholas Bellinger "implementation\n"); 1663e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1664e48354ceSNicholas Bellinger buf, conn); 1665e48354ceSNicholas Bellinger } 1666e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_ABORT_TASK) && 166750e5c87dSChristoph Hellwig be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) 166850e5c87dSChristoph Hellwig hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); 1669e48354ceSNicholas Bellinger 1670d28b1169SAndy Grover cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1671e48354ceSNicholas Bellinger if (!cmd) 1672e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1673e48354ceSNicholas Bellinger 1, buf, conn); 1674e48354ceSNicholas Bellinger 1675d28b1169SAndy Grover cmd->data_direction = DMA_NONE; 1676d28b1169SAndy Grover 1677d28b1169SAndy Grover cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); 1678d28b1169SAndy Grover if (!cmd->tmr_req) { 1679d28b1169SAndy Grover pr_err("Unable to allocate memory for" 1680d28b1169SAndy Grover " Task Management command!\n"); 1681d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1682d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1683d28b1169SAndy Grover 1, 1, buf, cmd); 1684d28b1169SAndy Grover } 1685d28b1169SAndy Grover 1686d28b1169SAndy Grover /* 1687d28b1169SAndy Grover * TASK_REASSIGN for ERL=2 / connection stays inside of 1688d28b1169SAndy Grover * LIO-Target $FABRIC_MOD 1689d28b1169SAndy Grover */ 1690d28b1169SAndy Grover if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { 1691d28b1169SAndy Grover 1692d28b1169SAndy Grover u8 tcm_function; 1693d28b1169SAndy Grover int ret; 1694d28b1169SAndy Grover 1695d28b1169SAndy Grover transport_init_se_cmd(&cmd->se_cmd, 1696d28b1169SAndy Grover &lio_target_fabric_configfs->tf_ops, 1697d28b1169SAndy Grover conn->sess->se_sess, 0, DMA_NONE, 16989c58b7ddSRoland Dreier MSG_SIMPLE_TAG, cmd->sense_buffer + 2); 1699d28b1169SAndy Grover 1700d28b1169SAndy Grover switch (function) { 1701d28b1169SAndy Grover case ISCSI_TM_FUNC_ABORT_TASK: 1702d28b1169SAndy Grover tcm_function = TMR_ABORT_TASK; 1703d28b1169SAndy Grover break; 1704d28b1169SAndy Grover case ISCSI_TM_FUNC_ABORT_TASK_SET: 1705d28b1169SAndy Grover tcm_function = TMR_ABORT_TASK_SET; 1706d28b1169SAndy Grover break; 1707d28b1169SAndy Grover case ISCSI_TM_FUNC_CLEAR_ACA: 1708d28b1169SAndy Grover tcm_function = TMR_CLEAR_ACA; 1709d28b1169SAndy Grover break; 1710d28b1169SAndy Grover case ISCSI_TM_FUNC_CLEAR_TASK_SET: 1711d28b1169SAndy Grover tcm_function = TMR_CLEAR_TASK_SET; 1712d28b1169SAndy Grover break; 1713d28b1169SAndy Grover case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 1714d28b1169SAndy Grover tcm_function = TMR_LUN_RESET; 1715d28b1169SAndy Grover break; 1716d28b1169SAndy Grover case ISCSI_TM_FUNC_TARGET_WARM_RESET: 1717d28b1169SAndy Grover tcm_function = TMR_TARGET_WARM_RESET; 1718d28b1169SAndy Grover break; 1719d28b1169SAndy Grover case ISCSI_TM_FUNC_TARGET_COLD_RESET: 1720d28b1169SAndy Grover tcm_function = TMR_TARGET_COLD_RESET; 1721d28b1169SAndy Grover break; 1722d28b1169SAndy Grover default: 1723d28b1169SAndy Grover pr_err("Unknown iSCSI TMR Function:" 1724d28b1169SAndy Grover " 0x%02x\n", function); 1725d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1726d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1727d28b1169SAndy Grover 1, 1, buf, cmd); 1728d28b1169SAndy Grover } 1729d28b1169SAndy Grover 1730d28b1169SAndy Grover ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, 1731d28b1169SAndy Grover tcm_function, GFP_KERNEL); 1732d28b1169SAndy Grover if (ret < 0) 1733d28b1169SAndy Grover return iscsit_add_reject_from_cmd( 1734d28b1169SAndy Grover ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1735d28b1169SAndy Grover 1, 1, buf, cmd); 1736d28b1169SAndy Grover 1737d28b1169SAndy Grover cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; 1738d28b1169SAndy Grover } 1739d28b1169SAndy Grover 1740e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; 1741e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_TASKMGTRSP; 1742e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 1743e48354ceSNicholas Bellinger cmd->init_task_tag = hdr->itt; 1744e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 174550e5c87dSChristoph Hellwig cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); 174650e5c87dSChristoph Hellwig cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); 1747e48354ceSNicholas Bellinger se_tmr = cmd->se_cmd.se_tmr_req; 1748e48354ceSNicholas Bellinger tmr_req = cmd->tmr_req; 1749e48354ceSNicholas Bellinger /* 1750e48354ceSNicholas Bellinger * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN 1751e48354ceSNicholas Bellinger */ 1752e48354ceSNicholas Bellinger if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { 17534f26998aSAndy Grover ret = transport_lookup_tmr_lun(&cmd->se_cmd, 17544f26998aSAndy Grover scsilun_to_int(&hdr->lun)); 1755e48354ceSNicholas Bellinger if (ret < 0) { 1756e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_NO_LUN; 1757e48354ceSNicholas Bellinger goto attach; 1758e48354ceSNicholas Bellinger } 1759e48354ceSNicholas Bellinger } 1760e48354ceSNicholas Bellinger 1761e48354ceSNicholas Bellinger switch (function) { 1762e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK: 1763e48354ceSNicholas Bellinger se_tmr->response = iscsit_tmr_abort_task(cmd, buf); 1764de103c93SChristoph Hellwig if (se_tmr->response) 1765e48354ceSNicholas Bellinger goto attach; 1766e48354ceSNicholas Bellinger break; 1767e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK_SET: 1768e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_ACA: 1769e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_TASK_SET: 1770e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 1771e48354ceSNicholas Bellinger break; 1772e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_WARM_RESET: 1773e48354ceSNicholas Bellinger if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { 1774e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; 1775e48354ceSNicholas Bellinger goto attach; 1776e48354ceSNicholas Bellinger } 1777e48354ceSNicholas Bellinger break; 1778e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_COLD_RESET: 1779e48354ceSNicholas Bellinger if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { 1780e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; 1781e48354ceSNicholas Bellinger goto attach; 1782e48354ceSNicholas Bellinger } 1783e48354ceSNicholas Bellinger break; 1784e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TASK_REASSIGN: 1785e48354ceSNicholas Bellinger se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); 1786e48354ceSNicholas Bellinger /* 1787e48354ceSNicholas Bellinger * Perform sanity checks on the ExpDataSN only if the 1788e48354ceSNicholas Bellinger * TASK_REASSIGN was successful. 1789e48354ceSNicholas Bellinger */ 1790de103c93SChristoph Hellwig if (se_tmr->response) 1791e48354ceSNicholas Bellinger break; 1792e48354ceSNicholas Bellinger 1793e48354ceSNicholas Bellinger if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) 1794e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1795e48354ceSNicholas Bellinger ISCSI_REASON_BOOKMARK_INVALID, 1, 1, 1796e48354ceSNicholas Bellinger buf, cmd); 1797e48354ceSNicholas Bellinger break; 1798e48354ceSNicholas Bellinger default: 1799e48354ceSNicholas Bellinger pr_err("Unknown TMR function: 0x%02x, protocol" 1800e48354ceSNicholas Bellinger " error.\n", function); 1801e48354ceSNicholas Bellinger se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; 1802e48354ceSNicholas Bellinger goto attach; 1803e48354ceSNicholas Bellinger } 1804e48354ceSNicholas Bellinger 1805e48354ceSNicholas Bellinger if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && 1806e48354ceSNicholas Bellinger (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) 1807e48354ceSNicholas Bellinger se_tmr->call_transport = 1; 1808e48354ceSNicholas Bellinger attach: 1809e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 18102fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1811e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1812e48354ceSNicholas Bellinger 1813e48354ceSNicholas Bellinger if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1814e48354ceSNicholas Bellinger int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1815e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) 1816e48354ceSNicholas Bellinger out_of_order_cmdsn = 1; 18175a4c8666SNicholas Bellinger else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) 1818e48354ceSNicholas Bellinger return 0; 18195a4c8666SNicholas Bellinger else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1820e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1821e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1822e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1823e48354ceSNicholas Bellinger } 182450e5c87dSChristoph Hellwig iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); 1825e48354ceSNicholas Bellinger 18265a4c8666SNicholas Bellinger if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) 1827e48354ceSNicholas Bellinger return 0; 1828e48354ceSNicholas Bellinger /* 1829e48354ceSNicholas Bellinger * Found the referenced task, send to transport for processing. 1830e48354ceSNicholas Bellinger */ 1831e48354ceSNicholas Bellinger if (se_tmr->call_transport) 1832e48354ceSNicholas Bellinger return transport_generic_handle_tmr(&cmd->se_cmd); 1833e48354ceSNicholas Bellinger 1834e48354ceSNicholas Bellinger /* 1835e48354ceSNicholas Bellinger * Could not find the referenced LUN, task, or Task Management 1836e48354ceSNicholas Bellinger * command not authorized or supported. Change state and 1837e48354ceSNicholas Bellinger * let the tx_thread send the response. 1838e48354ceSNicholas Bellinger * 1839e48354ceSNicholas Bellinger * For connection recovery, this is also the default action for 1840e48354ceSNicholas Bellinger * TMR TASK_REASSIGN. 1841e48354ceSNicholas Bellinger */ 1842e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 1843e48354ceSNicholas Bellinger return 0; 1844e48354ceSNicholas Bellinger } 1845e48354ceSNicholas Bellinger 1846e48354ceSNicholas Bellinger /* #warning FIXME: Support Text Command parameters besides SendTargets */ 1847e48354ceSNicholas Bellinger static int iscsit_handle_text_cmd( 1848e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1849e48354ceSNicholas Bellinger unsigned char *buf) 1850e48354ceSNicholas Bellinger { 1851e48354ceSNicholas Bellinger char *text_ptr, *text_in; 1852e48354ceSNicholas Bellinger int cmdsn_ret, niov = 0, rx_got, rx_size; 1853e48354ceSNicholas Bellinger u32 checksum = 0, data_crc = 0, payload_length; 185476f1928eSNicholas Bellinger u32 padding = 0, pad_bytes = 0, text_length = 0; 1855e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 1856e48354ceSNicholas Bellinger struct kvec iov[3]; 1857e48354ceSNicholas Bellinger struct iscsi_text *hdr; 1858e48354ceSNicholas Bellinger 1859e48354ceSNicholas Bellinger hdr = (struct iscsi_text *) buf; 1860e48354ceSNicholas Bellinger payload_length = ntoh24(hdr->dlength); 1861e48354ceSNicholas Bellinger 186221f5aa7eSNicholas Bellinger if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { 1863e48354ceSNicholas Bellinger pr_err("Unable to accept text parameter length: %u" 186421f5aa7eSNicholas Bellinger "greater than MaxXmitDataSegmentLength %u.\n", 186521f5aa7eSNicholas Bellinger payload_length, conn->conn_ops->MaxXmitDataSegmentLength); 1866e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 1867e48354ceSNicholas Bellinger buf, conn); 1868e48354ceSNicholas Bellinger } 1869e48354ceSNicholas Bellinger 1870e48354ceSNicholas Bellinger pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," 1871e48354ceSNicholas Bellinger " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, 1872e48354ceSNicholas Bellinger hdr->exp_statsn, payload_length); 1873e48354ceSNicholas Bellinger 1874e48354ceSNicholas Bellinger rx_size = text_length = payload_length; 1875e48354ceSNicholas Bellinger if (text_length) { 1876e48354ceSNicholas Bellinger text_in = kzalloc(text_length, GFP_KERNEL); 1877e48354ceSNicholas Bellinger if (!text_in) { 1878e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 1879e48354ceSNicholas Bellinger " incoming text parameters\n"); 1880e48354ceSNicholas Bellinger return -1; 1881e48354ceSNicholas Bellinger } 1882e48354ceSNicholas Bellinger 1883e48354ceSNicholas Bellinger memset(iov, 0, 3 * sizeof(struct kvec)); 1884e48354ceSNicholas Bellinger iov[niov].iov_base = text_in; 1885e48354ceSNicholas Bellinger iov[niov++].iov_len = text_length; 1886e48354ceSNicholas Bellinger 1887e48354ceSNicholas Bellinger padding = ((-payload_length) & 3); 1888e48354ceSNicholas Bellinger if (padding != 0) { 188976f1928eSNicholas Bellinger iov[niov].iov_base = &pad_bytes; 1890e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 1891e48354ceSNicholas Bellinger rx_size += padding; 1892e48354ceSNicholas Bellinger pr_debug("Receiving %u additional bytes" 1893e48354ceSNicholas Bellinger " for padding.\n", padding); 1894e48354ceSNicholas Bellinger } 1895e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1896e48354ceSNicholas Bellinger iov[niov].iov_base = &checksum; 1897e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 1898e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 1899e48354ceSNicholas Bellinger } 1900e48354ceSNicholas Bellinger 1901e48354ceSNicholas Bellinger rx_got = rx_data(conn, &iov[0], niov, rx_size); 1902e48354ceSNicholas Bellinger if (rx_got != rx_size) { 1903e48354ceSNicholas Bellinger kfree(text_in); 1904e48354ceSNicholas Bellinger return -1; 1905e48354ceSNicholas Bellinger } 1906e48354ceSNicholas Bellinger 1907e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 1908e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 1909e48354ceSNicholas Bellinger text_in, text_length, 191076f1928eSNicholas Bellinger padding, (u8 *)&pad_bytes, 1911e48354ceSNicholas Bellinger (u8 *)&data_crc); 1912e48354ceSNicholas Bellinger 1913e48354ceSNicholas Bellinger if (checksum != data_crc) { 1914e48354ceSNicholas Bellinger pr_err("Text data CRC32C DataDigest" 1915e48354ceSNicholas Bellinger " 0x%08x does not match computed" 1916e48354ceSNicholas Bellinger " 0x%08x\n", checksum, data_crc); 1917e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 1918e48354ceSNicholas Bellinger pr_err("Unable to recover from" 1919e48354ceSNicholas Bellinger " Text Data digest failure while in" 1920e48354ceSNicholas Bellinger " ERL=0.\n"); 1921e48354ceSNicholas Bellinger kfree(text_in); 1922e48354ceSNicholas Bellinger return -1; 1923e48354ceSNicholas Bellinger } else { 1924e48354ceSNicholas Bellinger /* 1925e48354ceSNicholas Bellinger * Silently drop this PDU and let the 1926e48354ceSNicholas Bellinger * initiator plug the CmdSN gap. 1927e48354ceSNicholas Bellinger */ 1928e48354ceSNicholas Bellinger pr_debug("Dropping Text" 1929e48354ceSNicholas Bellinger " Command CmdSN: 0x%08x due to" 1930e48354ceSNicholas Bellinger " DataCRC error.\n", hdr->cmdsn); 1931e48354ceSNicholas Bellinger kfree(text_in); 1932e48354ceSNicholas Bellinger return 0; 1933e48354ceSNicholas Bellinger } 1934e48354ceSNicholas Bellinger } else { 1935e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest" 1936e48354ceSNicholas Bellinger " 0x%08x for %u bytes of text data.\n", 1937e48354ceSNicholas Bellinger checksum, text_length); 1938e48354ceSNicholas Bellinger } 1939e48354ceSNicholas Bellinger } 1940e48354ceSNicholas Bellinger text_in[text_length - 1] = '\0'; 1941e48354ceSNicholas Bellinger pr_debug("Successfully read %d bytes of text" 1942e48354ceSNicholas Bellinger " data.\n", text_length); 1943e48354ceSNicholas Bellinger 1944e48354ceSNicholas Bellinger if (strncmp("SendTargets", text_in, 11) != 0) { 1945e48354ceSNicholas Bellinger pr_err("Received Text Data that is not" 1946e48354ceSNicholas Bellinger " SendTargets, cannot continue.\n"); 1947e48354ceSNicholas Bellinger kfree(text_in); 1948e48354ceSNicholas Bellinger return -1; 1949e48354ceSNicholas Bellinger } 1950e48354ceSNicholas Bellinger text_ptr = strchr(text_in, '='); 1951e48354ceSNicholas Bellinger if (!text_ptr) { 1952e48354ceSNicholas Bellinger pr_err("No \"=\" separator found in Text Data," 1953e48354ceSNicholas Bellinger " cannot continue.\n"); 1954e48354ceSNicholas Bellinger kfree(text_in); 1955e48354ceSNicholas Bellinger return -1; 1956e48354ceSNicholas Bellinger } 1957e48354ceSNicholas Bellinger if (strncmp("=All", text_ptr, 4) != 0) { 1958e48354ceSNicholas Bellinger pr_err("Unable to locate All value for" 1959e48354ceSNicholas Bellinger " SendTargets key, cannot continue.\n"); 1960e48354ceSNicholas Bellinger kfree(text_in); 1961e48354ceSNicholas Bellinger return -1; 1962e48354ceSNicholas Bellinger } 1963e48354ceSNicholas Bellinger /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ 1964e48354ceSNicholas Bellinger kfree(text_in); 1965e48354ceSNicholas Bellinger } 1966e48354ceSNicholas Bellinger 1967e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 1968e48354ceSNicholas Bellinger if (!cmd) 1969e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1970e48354ceSNicholas Bellinger 1, buf, conn); 1971e48354ceSNicholas Bellinger 1972e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_TEXT; 1973e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_TEXTRSP; 1974e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 1975e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 1976e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 197750e5c87dSChristoph Hellwig cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); 197850e5c87dSChristoph Hellwig cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); 1979e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 1980e48354ceSNicholas Bellinger 1981e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 19822fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1983e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1984e48354ceSNicholas Bellinger 198550e5c87dSChristoph Hellwig iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); 1986e48354ceSNicholas Bellinger 1987e48354ceSNicholas Bellinger if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { 1988e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 1989e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) 1990e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 1991e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 1992e48354ceSNicholas Bellinger 1, 0, buf, cmd); 1993e48354ceSNicholas Bellinger 1994e48354ceSNicholas Bellinger return 0; 1995e48354ceSNicholas Bellinger } 1996e48354ceSNicholas Bellinger 1997e48354ceSNicholas Bellinger return iscsit_execute_cmd(cmd, 0); 1998e48354ceSNicholas Bellinger } 1999e48354ceSNicholas Bellinger 2000e48354ceSNicholas Bellinger int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2001e48354ceSNicholas Bellinger { 2002e48354ceSNicholas Bellinger struct iscsi_conn *conn_p; 2003e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2004e48354ceSNicholas Bellinger 2005e48354ceSNicholas Bellinger pr_debug("Received logout request CLOSESESSION on CID: %hu" 2006e48354ceSNicholas Bellinger " for SID: %u.\n", conn->cid, conn->sess->sid); 2007e48354ceSNicholas Bellinger 2008e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 1); 2009e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 1); 2010e48354ceSNicholas Bellinger conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; 2011e48354ceSNicholas Bellinger 2012e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 2013e48354ceSNicholas Bellinger iscsit_inc_session_usage_count(sess); 2014e48354ceSNicholas Bellinger 2015e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 2016e48354ceSNicholas Bellinger list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { 2017e48354ceSNicholas Bellinger if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) 2018e48354ceSNicholas Bellinger continue; 2019e48354ceSNicholas Bellinger 2020e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 2021e48354ceSNicholas Bellinger conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; 2022e48354ceSNicholas Bellinger } 2023e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 2024e48354ceSNicholas Bellinger 2025e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2026e48354ceSNicholas Bellinger 2027e48354ceSNicholas Bellinger return 0; 2028e48354ceSNicholas Bellinger } 2029e48354ceSNicholas Bellinger 2030e48354ceSNicholas Bellinger int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2031e48354ceSNicholas Bellinger { 2032e48354ceSNicholas Bellinger struct iscsi_conn *l_conn; 2033e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2034e48354ceSNicholas Bellinger 2035e48354ceSNicholas Bellinger pr_debug("Received logout request CLOSECONNECTION for CID:" 2036e48354ceSNicholas Bellinger " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); 2037e48354ceSNicholas Bellinger 2038e48354ceSNicholas Bellinger /* 2039e48354ceSNicholas Bellinger * A Logout Request with a CLOSECONNECTION reason code for a CID 2040e48354ceSNicholas Bellinger * can arrive on a connection with a differing CID. 2041e48354ceSNicholas Bellinger */ 2042e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 2043e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 2044e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 2045e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; 2046e48354ceSNicholas Bellinger 2047e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 1); 2048e48354ceSNicholas Bellinger conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; 2049e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 2050e48354ceSNicholas Bellinger 2051e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 2052e48354ceSNicholas Bellinger } else { 2053e48354ceSNicholas Bellinger /* 2054e48354ceSNicholas Bellinger * Handle all different cid CLOSECONNECTION requests in 2055e48354ceSNicholas Bellinger * iscsit_logout_post_handler_diffcid() as to give enough 2056e48354ceSNicholas Bellinger * time for any non immediate command's CmdSN to be 2057e48354ceSNicholas Bellinger * acknowledged on the connection in question. 2058e48354ceSNicholas Bellinger * 2059e48354ceSNicholas Bellinger * Here we simply make sure the CID is still around. 2060e48354ceSNicholas Bellinger */ 2061e48354ceSNicholas Bellinger l_conn = iscsit_get_conn_from_cid(sess, 2062e48354ceSNicholas Bellinger cmd->logout_cid); 2063e48354ceSNicholas Bellinger if (!l_conn) { 2064e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; 2065e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, 2066e48354ceSNicholas Bellinger cmd->i_state); 2067e48354ceSNicholas Bellinger return 0; 2068e48354ceSNicholas Bellinger } 2069e48354ceSNicholas Bellinger 2070e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(l_conn); 2071e48354ceSNicholas Bellinger } 2072e48354ceSNicholas Bellinger 2073e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2074e48354ceSNicholas Bellinger 2075e48354ceSNicholas Bellinger return 0; 2076e48354ceSNicholas Bellinger } 2077e48354ceSNicholas Bellinger 2078e48354ceSNicholas Bellinger int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2079e48354ceSNicholas Bellinger { 2080e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2081e48354ceSNicholas Bellinger 2082e48354ceSNicholas Bellinger pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" 2083e48354ceSNicholas Bellinger " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); 2084e48354ceSNicholas Bellinger 2085e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel != 2) { 2086e48354ceSNicholas Bellinger pr_err("Received Logout Request REMOVECONNFORRECOVERY" 2087e48354ceSNicholas Bellinger " while ERL!=2.\n"); 2088e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; 2089e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2090e48354ceSNicholas Bellinger return 0; 2091e48354ceSNicholas Bellinger } 2092e48354ceSNicholas Bellinger 2093e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 2094e48354ceSNicholas Bellinger pr_err("Received Logout Request REMOVECONNFORRECOVERY" 2095e48354ceSNicholas Bellinger " with CID: %hu on CID: %hu, implementation error.\n", 2096e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2097e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; 2098e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2099e48354ceSNicholas Bellinger return 0; 2100e48354ceSNicholas Bellinger } 2101e48354ceSNicholas Bellinger 2102e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); 2103e48354ceSNicholas Bellinger 2104e48354ceSNicholas Bellinger return 0; 2105e48354ceSNicholas Bellinger } 2106e48354ceSNicholas Bellinger 2107e48354ceSNicholas Bellinger static int iscsit_handle_logout_cmd( 2108e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2109e48354ceSNicholas Bellinger unsigned char *buf) 2110e48354ceSNicholas Bellinger { 2111e48354ceSNicholas Bellinger int cmdsn_ret, logout_remove = 0; 2112e48354ceSNicholas Bellinger u8 reason_code = 0; 2113e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 2114e48354ceSNicholas Bellinger struct iscsi_logout *hdr; 2115e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); 2116e48354ceSNicholas Bellinger 2117e48354ceSNicholas Bellinger hdr = (struct iscsi_logout *) buf; 2118e48354ceSNicholas Bellinger reason_code = (hdr->flags & 0x7f); 2119e48354ceSNicholas Bellinger 2120e48354ceSNicholas Bellinger if (tiqn) { 2121e48354ceSNicholas Bellinger spin_lock(&tiqn->logout_stats.lock); 2122e48354ceSNicholas Bellinger if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) 2123e48354ceSNicholas Bellinger tiqn->logout_stats.normal_logouts++; 2124e48354ceSNicholas Bellinger else 2125e48354ceSNicholas Bellinger tiqn->logout_stats.abnormal_logouts++; 2126e48354ceSNicholas Bellinger spin_unlock(&tiqn->logout_stats.lock); 2127e48354ceSNicholas Bellinger } 2128e48354ceSNicholas Bellinger 2129e48354ceSNicholas Bellinger pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" 2130e48354ceSNicholas Bellinger " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", 2131e48354ceSNicholas Bellinger hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, 2132e48354ceSNicholas Bellinger hdr->cid, conn->cid); 2133e48354ceSNicholas Bellinger 2134e48354ceSNicholas Bellinger if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { 2135e48354ceSNicholas Bellinger pr_err("Received logout request on connection that" 2136e48354ceSNicholas Bellinger " is not in logged in state, ignoring request.\n"); 2137e48354ceSNicholas Bellinger return 0; 2138e48354ceSNicholas Bellinger } 2139e48354ceSNicholas Bellinger 2140e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 2141e48354ceSNicholas Bellinger if (!cmd) 2142e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, 2143e48354ceSNicholas Bellinger buf, conn); 2144e48354ceSNicholas Bellinger 2145e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_LOGOUT; 2146e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_LOGOUTRSP; 2147e48354ceSNicholas Bellinger cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); 2148e48354ceSNicholas Bellinger conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; 2149e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 215050e5c87dSChristoph Hellwig cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); 215150e5c87dSChristoph Hellwig cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); 215250e5c87dSChristoph Hellwig cmd->logout_cid = be16_to_cpu(hdr->cid); 2153e48354ceSNicholas Bellinger cmd->logout_reason = reason_code; 2154e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 2155e48354ceSNicholas Bellinger 2156e48354ceSNicholas Bellinger /* 2157e48354ceSNicholas Bellinger * We need to sleep in these cases (by returning 1) until the Logout 2158e48354ceSNicholas Bellinger * Response gets sent in the tx thread. 2159e48354ceSNicholas Bellinger */ 2160e48354ceSNicholas Bellinger if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || 2161e48354ceSNicholas Bellinger ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && 216250e5c87dSChristoph Hellwig be16_to_cpu(hdr->cid) == conn->cid)) 2163e48354ceSNicholas Bellinger logout_remove = 1; 2164e48354ceSNicholas Bellinger 2165e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 21662fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 2167e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 2168e48354ceSNicholas Bellinger 2169e48354ceSNicholas Bellinger if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) 217050e5c87dSChristoph Hellwig iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); 2171e48354ceSNicholas Bellinger 2172e48354ceSNicholas Bellinger /* 2173e48354ceSNicholas Bellinger * Immediate commands are executed, well, immediately. 2174e48354ceSNicholas Bellinger * Non-Immediate Logout Commands are executed in CmdSN order. 2175e48354ceSNicholas Bellinger */ 2176c6037cc5SAndy Grover if (cmd->immediate_cmd) { 2177e48354ceSNicholas Bellinger int ret = iscsit_execute_cmd(cmd, 0); 2178e48354ceSNicholas Bellinger 2179e48354ceSNicholas Bellinger if (ret < 0) 2180e48354ceSNicholas Bellinger return ret; 2181e48354ceSNicholas Bellinger } else { 2182e48354ceSNicholas Bellinger cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); 2183e48354ceSNicholas Bellinger if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { 2184e48354ceSNicholas Bellinger logout_remove = 0; 2185e48354ceSNicholas Bellinger } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { 2186e48354ceSNicholas Bellinger return iscsit_add_reject_from_cmd( 2187e48354ceSNicholas Bellinger ISCSI_REASON_PROTOCOL_ERROR, 2188e48354ceSNicholas Bellinger 1, 0, buf, cmd); 2189e48354ceSNicholas Bellinger } 2190e48354ceSNicholas Bellinger } 2191e48354ceSNicholas Bellinger 2192e48354ceSNicholas Bellinger return logout_remove; 2193e48354ceSNicholas Bellinger } 2194e48354ceSNicholas Bellinger 2195e48354ceSNicholas Bellinger static int iscsit_handle_snack( 2196e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2197e48354ceSNicholas Bellinger unsigned char *buf) 2198e48354ceSNicholas Bellinger { 2199e48354ceSNicholas Bellinger struct iscsi_snack *hdr; 2200e48354ceSNicholas Bellinger 2201e48354ceSNicholas Bellinger hdr = (struct iscsi_snack *) buf; 2202e48354ceSNicholas Bellinger hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; 2203e48354ceSNicholas Bellinger 2204e48354ceSNicholas Bellinger pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" 2205e48354ceSNicholas Bellinger " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," 2206e48354ceSNicholas Bellinger " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, 2207e48354ceSNicholas Bellinger hdr->begrun, hdr->runlength, conn->cid); 2208e48354ceSNicholas Bellinger 2209e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 2210e48354ceSNicholas Bellinger pr_err("Initiator sent SNACK request while in" 2211e48354ceSNicholas Bellinger " ErrorRecoveryLevel=0.\n"); 2212e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2213e48354ceSNicholas Bellinger buf, conn); 2214e48354ceSNicholas Bellinger } 2215e48354ceSNicholas Bellinger /* 2216e48354ceSNicholas Bellinger * SNACK_DATA and SNACK_R2T are both 0, so check which function to 2217e48354ceSNicholas Bellinger * call from inside iscsi_send_recovery_datain_or_r2t(). 2218e48354ceSNicholas Bellinger */ 2219e48354ceSNicholas Bellinger switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { 2220e48354ceSNicholas Bellinger case 0: 2221e48354ceSNicholas Bellinger return iscsit_handle_recovery_datain_or_r2t(conn, buf, 222250e5c87dSChristoph Hellwig hdr->itt, 222350e5c87dSChristoph Hellwig be32_to_cpu(hdr->ttt), 222450e5c87dSChristoph Hellwig be32_to_cpu(hdr->begrun), 222550e5c87dSChristoph Hellwig be32_to_cpu(hdr->runlength)); 2226e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_STATUS: 222750e5c87dSChristoph Hellwig return iscsit_handle_status_snack(conn, hdr->itt, 222850e5c87dSChristoph Hellwig be32_to_cpu(hdr->ttt), 222950e5c87dSChristoph Hellwig be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); 2230e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: 223150e5c87dSChristoph Hellwig return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), 223250e5c87dSChristoph Hellwig be32_to_cpu(hdr->begrun), 223350e5c87dSChristoph Hellwig be32_to_cpu(hdr->runlength)); 2234e48354ceSNicholas Bellinger case ISCSI_FLAG_SNACK_TYPE_RDATA: 2235e48354ceSNicholas Bellinger /* FIXME: Support R-Data SNACK */ 2236e48354ceSNicholas Bellinger pr_err("R-Data SNACK Not Supported.\n"); 2237e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2238e48354ceSNicholas Bellinger buf, conn); 2239e48354ceSNicholas Bellinger default: 2240e48354ceSNicholas Bellinger pr_err("Unknown SNACK type 0x%02x, protocol" 2241e48354ceSNicholas Bellinger " error.\n", hdr->flags & 0x0f); 2242e48354ceSNicholas Bellinger return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 2243e48354ceSNicholas Bellinger buf, conn); 2244e48354ceSNicholas Bellinger } 2245e48354ceSNicholas Bellinger 2246e48354ceSNicholas Bellinger return 0; 2247e48354ceSNicholas Bellinger } 2248e48354ceSNicholas Bellinger 2249e48354ceSNicholas Bellinger static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) 2250e48354ceSNicholas Bellinger { 2251e48354ceSNicholas Bellinger if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || 2252e48354ceSNicholas Bellinger (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { 2253e48354ceSNicholas Bellinger wait_for_completion_interruptible_timeout( 2254e48354ceSNicholas Bellinger &conn->rx_half_close_comp, 2255e48354ceSNicholas Bellinger ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); 2256e48354ceSNicholas Bellinger } 2257e48354ceSNicholas Bellinger } 2258e48354ceSNicholas Bellinger 2259e48354ceSNicholas Bellinger static int iscsit_handle_immediate_data( 2260e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2261e48354ceSNicholas Bellinger unsigned char *buf, 2262e48354ceSNicholas Bellinger u32 length) 2263e48354ceSNicholas Bellinger { 2264e48354ceSNicholas Bellinger int iov_ret, rx_got = 0, rx_size = 0; 2265e48354ceSNicholas Bellinger u32 checksum, iov_count = 0, padding = 0; 2266e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 2267e48354ceSNicholas Bellinger struct kvec *iov; 2268e48354ceSNicholas Bellinger 2269e48354ceSNicholas Bellinger iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); 2270e48354ceSNicholas Bellinger if (iov_ret < 0) 2271e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2272e48354ceSNicholas Bellinger 2273e48354ceSNicholas Bellinger rx_size = length; 2274e48354ceSNicholas Bellinger iov_count = iov_ret; 2275e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 2276e48354ceSNicholas Bellinger 2277e48354ceSNicholas Bellinger padding = ((-length) & 3); 2278e48354ceSNicholas Bellinger if (padding != 0) { 2279e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 2280e48354ceSNicholas Bellinger iov[iov_count++].iov_len = padding; 2281e48354ceSNicholas Bellinger rx_size += padding; 2282e48354ceSNicholas Bellinger } 2283e48354ceSNicholas Bellinger 2284e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2285e48354ceSNicholas Bellinger iov[iov_count].iov_base = &checksum; 2286e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 2287e48354ceSNicholas Bellinger rx_size += ISCSI_CRC_LEN; 2288e48354ceSNicholas Bellinger } 2289e48354ceSNicholas Bellinger 2290e48354ceSNicholas Bellinger rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); 2291e48354ceSNicholas Bellinger 2292e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 2293e48354ceSNicholas Bellinger 2294e48354ceSNicholas Bellinger if (rx_got != rx_size) { 2295e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 2296e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2297e48354ceSNicholas Bellinger } 2298e48354ceSNicholas Bellinger 2299e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2300e48354ceSNicholas Bellinger u32 data_crc; 2301e48354ceSNicholas Bellinger 2302e48354ceSNicholas Bellinger data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, 2303e48354ceSNicholas Bellinger cmd->write_data_done, length, padding, 2304e48354ceSNicholas Bellinger cmd->pad_bytes); 2305e48354ceSNicholas Bellinger 2306e48354ceSNicholas Bellinger if (checksum != data_crc) { 2307e48354ceSNicholas Bellinger pr_err("ImmediateData CRC32C DataDigest 0x%08x" 2308e48354ceSNicholas Bellinger " does not match computed 0x%08x\n", checksum, 2309e48354ceSNicholas Bellinger data_crc); 2310e48354ceSNicholas Bellinger 2311e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 2312e48354ceSNicholas Bellinger pr_err("Unable to recover from" 2313e48354ceSNicholas Bellinger " Immediate Data digest failure while" 2314e48354ceSNicholas Bellinger " in ERL=0.\n"); 2315e48354ceSNicholas Bellinger iscsit_add_reject_from_cmd( 2316e48354ceSNicholas Bellinger ISCSI_REASON_DATA_DIGEST_ERROR, 2317e48354ceSNicholas Bellinger 1, 0, buf, cmd); 2318e48354ceSNicholas Bellinger return IMMEDIATE_DATA_CANNOT_RECOVER; 2319e48354ceSNicholas Bellinger } else { 2320e48354ceSNicholas Bellinger iscsit_add_reject_from_cmd( 2321e48354ceSNicholas Bellinger ISCSI_REASON_DATA_DIGEST_ERROR, 2322e48354ceSNicholas Bellinger 0, 0, buf, cmd); 2323e48354ceSNicholas Bellinger return IMMEDIATE_DATA_ERL1_CRC_FAILURE; 2324e48354ceSNicholas Bellinger } 2325e48354ceSNicholas Bellinger } else { 2326e48354ceSNicholas Bellinger pr_debug("Got CRC32C DataDigest 0x%08x for" 2327e48354ceSNicholas Bellinger " %u bytes of Immediate Data\n", checksum, 2328e48354ceSNicholas Bellinger length); 2329e48354ceSNicholas Bellinger } 2330e48354ceSNicholas Bellinger } 2331e48354ceSNicholas Bellinger 2332e48354ceSNicholas Bellinger cmd->write_data_done += length; 2333e48354ceSNicholas Bellinger 2334ebf1d95cSAndy Grover if (cmd->write_data_done == cmd->se_cmd.data_length) { 2335e48354ceSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 2336e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 2337e48354ceSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 2338e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 2339e48354ceSNicholas Bellinger } 2340e48354ceSNicholas Bellinger 2341e48354ceSNicholas Bellinger return IMMEDIATE_DATA_NORMAL_OPERATION; 2342e48354ceSNicholas Bellinger } 2343e48354ceSNicholas Bellinger 2344e48354ceSNicholas Bellinger /* 2345e48354ceSNicholas Bellinger * Called with sess->conn_lock held. 2346e48354ceSNicholas Bellinger */ 2347e48354ceSNicholas Bellinger /* #warning iscsi_build_conn_drop_async_message() only sends out on connections 2348e48354ceSNicholas Bellinger with active network interface */ 2349e48354ceSNicholas Bellinger static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) 2350e48354ceSNicholas Bellinger { 2351e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 2352e48354ceSNicholas Bellinger struct iscsi_conn *conn_p; 2353e48354ceSNicholas Bellinger 2354e48354ceSNicholas Bellinger /* 2355e48354ceSNicholas Bellinger * Only send a Asynchronous Message on connections whos network 2356e48354ceSNicholas Bellinger * interface is still functional. 2357e48354ceSNicholas Bellinger */ 2358e48354ceSNicholas Bellinger list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { 2359e48354ceSNicholas Bellinger if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { 2360e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_p); 2361e48354ceSNicholas Bellinger break; 2362e48354ceSNicholas Bellinger } 2363e48354ceSNicholas Bellinger } 2364e48354ceSNicholas Bellinger 2365e48354ceSNicholas Bellinger if (!conn_p) 2366e48354ceSNicholas Bellinger return; 2367e48354ceSNicholas Bellinger 23683c989d76SWei Yongjun cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC); 2369e48354ceSNicholas Bellinger if (!cmd) { 2370e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_p); 2371e48354ceSNicholas Bellinger return; 2372e48354ceSNicholas Bellinger } 2373e48354ceSNicholas Bellinger 2374e48354ceSNicholas Bellinger cmd->logout_cid = conn->cid; 2375e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; 2376e48354ceSNicholas Bellinger cmd->i_state = ISTATE_SEND_ASYNCMSG; 2377e48354ceSNicholas Bellinger 2378e48354ceSNicholas Bellinger spin_lock_bh(&conn_p->cmd_lock); 23792fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); 2380e48354ceSNicholas Bellinger spin_unlock_bh(&conn_p->cmd_lock); 2381e48354ceSNicholas Bellinger 2382e48354ceSNicholas Bellinger iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); 2383e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_p); 2384e48354ceSNicholas Bellinger } 2385e48354ceSNicholas Bellinger 2386e48354ceSNicholas Bellinger static int iscsit_send_conn_drop_async_message( 2387e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2388e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2389e48354ceSNicholas Bellinger { 2390e48354ceSNicholas Bellinger struct iscsi_async *hdr; 2391e48354ceSNicholas Bellinger 2392e48354ceSNicholas Bellinger cmd->tx_size = ISCSI_HDR_LEN; 2393e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; 2394e48354ceSNicholas Bellinger 2395e48354ceSNicholas Bellinger hdr = (struct iscsi_async *) cmd->pdu; 2396e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_ASYNC_EVENT; 2397e48354ceSNicholas Bellinger hdr->flags = ISCSI_FLAG_CMD_FINAL; 239866c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 2399e48354ceSNicholas Bellinger cmd->targ_xfer_tag = 0xFFFFFFFF; 2400e48354ceSNicholas Bellinger put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); 2401e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2402e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2403e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2404e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2405e48354ceSNicholas Bellinger hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; 2406e48354ceSNicholas Bellinger hdr->param1 = cpu_to_be16(cmd->logout_cid); 2407e48354ceSNicholas Bellinger hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); 2408e48354ceSNicholas Bellinger hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); 2409e48354ceSNicholas Bellinger 2410e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2411e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2412e48354ceSNicholas Bellinger 2413e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2414e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2415e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2416e48354ceSNicholas Bellinger 2417e48354ceSNicholas Bellinger cmd->tx_size += ISCSI_CRC_LEN; 2418e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2419e48354ceSNicholas Bellinger " Async Message 0x%08x\n", *header_digest); 2420e48354ceSNicholas Bellinger } 2421e48354ceSNicholas Bellinger 2422e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2423e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = cmd->tx_size; 2424e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2425e48354ceSNicholas Bellinger 2426e48354ceSNicholas Bellinger pr_debug("Sending Connection Dropped Async Message StatSN:" 2427e48354ceSNicholas Bellinger " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, 2428e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2429e48354ceSNicholas Bellinger return 0; 2430e48354ceSNicholas Bellinger } 2431e48354ceSNicholas Bellinger 24326f3c0e69SAndy Grover static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) 24336f3c0e69SAndy Grover { 24346f3c0e69SAndy Grover if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || 24356f3c0e69SAndy Grover (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { 24366f3c0e69SAndy Grover wait_for_completion_interruptible_timeout( 24376f3c0e69SAndy Grover &conn->tx_half_close_comp, 24386f3c0e69SAndy Grover ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); 24396f3c0e69SAndy Grover } 24406f3c0e69SAndy Grover } 24416f3c0e69SAndy Grover 2442e48354ceSNicholas Bellinger static int iscsit_send_data_in( 2443e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 24446f3c0e69SAndy Grover struct iscsi_conn *conn) 2445e48354ceSNicholas Bellinger { 2446e48354ceSNicholas Bellinger int iov_ret = 0, set_statsn = 0; 2447e48354ceSNicholas Bellinger u32 iov_count = 0, tx_size = 0; 2448e48354ceSNicholas Bellinger struct iscsi_datain datain; 2449e48354ceSNicholas Bellinger struct iscsi_datain_req *dr; 2450e48354ceSNicholas Bellinger struct iscsi_data_rsp *hdr; 2451e48354ceSNicholas Bellinger struct kvec *iov; 24526f3c0e69SAndy Grover int eodr = 0; 24536f3c0e69SAndy Grover int ret; 2454e48354ceSNicholas Bellinger 2455e48354ceSNicholas Bellinger memset(&datain, 0, sizeof(struct iscsi_datain)); 2456e48354ceSNicholas Bellinger dr = iscsit_get_datain_values(cmd, &datain); 2457e48354ceSNicholas Bellinger if (!dr) { 2458e48354ceSNicholas Bellinger pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", 2459e48354ceSNicholas Bellinger cmd->init_task_tag); 2460e48354ceSNicholas Bellinger return -1; 2461e48354ceSNicholas Bellinger } 2462e48354ceSNicholas Bellinger 2463e48354ceSNicholas Bellinger /* 2464e48354ceSNicholas Bellinger * Be paranoid and double check the logic for now. 2465e48354ceSNicholas Bellinger */ 2466ebf1d95cSAndy Grover if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { 2467e48354ceSNicholas Bellinger pr_err("Command ITT: 0x%08x, datain.offset: %u and" 2468e48354ceSNicholas Bellinger " datain.length: %u exceeds cmd->data_length: %u\n", 2469e48354ceSNicholas Bellinger cmd->init_task_tag, datain.offset, datain.length, 2470ebf1d95cSAndy Grover cmd->se_cmd.data_length); 2471e48354ceSNicholas Bellinger return -1; 2472e48354ceSNicholas Bellinger } 2473e48354ceSNicholas Bellinger 2474e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 2475e48354ceSNicholas Bellinger conn->sess->tx_data_octets += datain.length; 2476e48354ceSNicholas Bellinger if (conn->sess->se_sess->se_node_acl) { 2477e48354ceSNicholas Bellinger spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); 2478e48354ceSNicholas Bellinger conn->sess->se_sess->se_node_acl->read_bytes += datain.length; 2479e48354ceSNicholas Bellinger spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); 2480e48354ceSNicholas Bellinger } 2481e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 2482e48354ceSNicholas Bellinger /* 2483e48354ceSNicholas Bellinger * Special case for successfully execution w/ both DATAIN 2484e48354ceSNicholas Bellinger * and Sense Data. 2485e48354ceSNicholas Bellinger */ 2486e48354ceSNicholas Bellinger if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && 2487e48354ceSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) 2488e48354ceSNicholas Bellinger datain.flags &= ~ISCSI_FLAG_DATA_STATUS; 2489e48354ceSNicholas Bellinger else { 2490e48354ceSNicholas Bellinger if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || 2491e48354ceSNicholas Bellinger (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { 2492e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2493e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2494e48354ceSNicholas Bellinger set_statsn = 1; 2495e48354ceSNicholas Bellinger } else if (dr->dr_complete == 2496e48354ceSNicholas Bellinger DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) 2497e48354ceSNicholas Bellinger set_statsn = 1; 2498e48354ceSNicholas Bellinger } 2499e48354ceSNicholas Bellinger 2500e48354ceSNicholas Bellinger hdr = (struct iscsi_data_rsp *) cmd->pdu; 2501e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2502e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_DATA_IN; 2503e48354ceSNicholas Bellinger hdr->flags = datain.flags; 2504e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { 2505e48354ceSNicholas Bellinger if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { 2506e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; 25077e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 2508e48354ceSNicholas Bellinger } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { 2509e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; 25107e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 2511e48354ceSNicholas Bellinger } 2512e48354ceSNicholas Bellinger } 2513e48354ceSNicholas Bellinger hton24(hdr->dlength, datain.length); 2514e48354ceSNicholas Bellinger if (hdr->flags & ISCSI_FLAG_DATA_ACK) 2515e48354ceSNicholas Bellinger int_to_scsilun(cmd->se_cmd.orig_fe_lun, 2516e48354ceSNicholas Bellinger (struct scsi_lun *)&hdr->lun); 2517e48354ceSNicholas Bellinger else 2518e48354ceSNicholas Bellinger put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); 2519e48354ceSNicholas Bellinger 252066c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 252150e5c87dSChristoph Hellwig 252250e5c87dSChristoph Hellwig if (hdr->flags & ISCSI_FLAG_DATA_ACK) 252350e5c87dSChristoph Hellwig hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 252450e5c87dSChristoph Hellwig else 252550e5c87dSChristoph Hellwig hdr->ttt = cpu_to_be32(0xFFFFFFFF); 252650e5c87dSChristoph Hellwig if (set_statsn) 252750e5c87dSChristoph Hellwig hdr->statsn = cpu_to_be32(cmd->stat_sn); 252850e5c87dSChristoph Hellwig else 252950e5c87dSChristoph Hellwig hdr->statsn = cpu_to_be32(0xFFFFFFFF); 253050e5c87dSChristoph Hellwig 2531e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2532e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2533e48354ceSNicholas Bellinger hdr->datasn = cpu_to_be32(datain.data_sn); 2534e48354ceSNicholas Bellinger hdr->offset = cpu_to_be32(datain.offset); 2535e48354ceSNicholas Bellinger 2536e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 2537e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 2538e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 2539e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 2540e48354ceSNicholas Bellinger 2541e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2542e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2543e48354ceSNicholas Bellinger 2544e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2545e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2546e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2547e48354ceSNicholas Bellinger 2548e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2549e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2550e48354ceSNicholas Bellinger 2551e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest" 2552e48354ceSNicholas Bellinger " for DataIN PDU 0x%08x\n", *header_digest); 2553e48354ceSNicholas Bellinger } 2554e48354ceSNicholas Bellinger 2555e48354ceSNicholas Bellinger iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length); 2556e48354ceSNicholas Bellinger if (iov_ret < 0) 2557e48354ceSNicholas Bellinger return -1; 2558e48354ceSNicholas Bellinger 2559e48354ceSNicholas Bellinger iov_count += iov_ret; 2560e48354ceSNicholas Bellinger tx_size += datain.length; 2561e48354ceSNicholas Bellinger 2562e48354ceSNicholas Bellinger cmd->padding = ((-datain.length) & 3); 2563e48354ceSNicholas Bellinger if (cmd->padding) { 2564e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pad_bytes; 2565e48354ceSNicholas Bellinger iov[iov_count++].iov_len = cmd->padding; 2566e48354ceSNicholas Bellinger tx_size += cmd->padding; 2567e48354ceSNicholas Bellinger 2568e48354ceSNicholas Bellinger pr_debug("Attaching %u padding bytes\n", 2569e48354ceSNicholas Bellinger cmd->padding); 2570e48354ceSNicholas Bellinger } 2571e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2572e48354ceSNicholas Bellinger cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, 2573e48354ceSNicholas Bellinger datain.offset, datain.length, cmd->padding, cmd->pad_bytes); 2574e48354ceSNicholas Bellinger 2575e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 2576e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 2577e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2578e48354ceSNicholas Bellinger 2579e48354ceSNicholas Bellinger pr_debug("Attached CRC32C DataDigest %d bytes, crc" 2580e48354ceSNicholas Bellinger " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); 2581e48354ceSNicholas Bellinger } 2582e48354ceSNicholas Bellinger 2583e48354ceSNicholas Bellinger cmd->iov_data_count = iov_count; 2584e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2585e48354ceSNicholas Bellinger 2586e48354ceSNicholas Bellinger pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," 2587e48354ceSNicholas Bellinger " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", 2588e48354ceSNicholas Bellinger cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), 2589e48354ceSNicholas Bellinger ntohl(hdr->offset), datain.length, conn->cid); 2590e48354ceSNicholas Bellinger 25916f3c0e69SAndy Grover /* sendpage is preferred but can't insert markers */ 25926f3c0e69SAndy Grover if (!conn->conn_ops->IFMarker) 25936f3c0e69SAndy Grover ret = iscsit_fe_sendpage_sg(cmd, conn); 25946f3c0e69SAndy Grover else 25956f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 0); 25966f3c0e69SAndy Grover 25976f3c0e69SAndy Grover iscsit_unmap_iovec(cmd); 25986f3c0e69SAndy Grover 25996f3c0e69SAndy Grover if (ret < 0) { 26006f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 26016f3c0e69SAndy Grover return ret; 26026f3c0e69SAndy Grover } 26036f3c0e69SAndy Grover 2604e48354ceSNicholas Bellinger if (dr->dr_complete) { 26056f3c0e69SAndy Grover eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? 2606e48354ceSNicholas Bellinger 2 : 1; 2607e48354ceSNicholas Bellinger iscsit_free_datain_req(cmd, dr); 2608e48354ceSNicholas Bellinger } 2609e48354ceSNicholas Bellinger 26106f3c0e69SAndy Grover return eodr; 2611e48354ceSNicholas Bellinger } 2612e48354ceSNicholas Bellinger 2613e48354ceSNicholas Bellinger static int iscsit_send_logout_response( 2614e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2615e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2616e48354ceSNicholas Bellinger { 2617e48354ceSNicholas Bellinger int niov = 0, tx_size; 2618e48354ceSNicholas Bellinger struct iscsi_conn *logout_conn = NULL; 2619e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr = NULL; 2620e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 2621e48354ceSNicholas Bellinger struct kvec *iov; 2622e48354ceSNicholas Bellinger struct iscsi_logout_rsp *hdr; 2623e48354ceSNicholas Bellinger /* 2624e48354ceSNicholas Bellinger * The actual shutting down of Sessions and/or Connections 2625e48354ceSNicholas Bellinger * for CLOSESESSION and CLOSECONNECTION Logout Requests 2626e48354ceSNicholas Bellinger * is done in scsi_logout_post_handler(). 2627e48354ceSNicholas Bellinger */ 2628e48354ceSNicholas Bellinger switch (cmd->logout_reason) { 2629e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_SESSION: 2630e48354ceSNicholas Bellinger pr_debug("iSCSI session logout successful, setting" 2631e48354ceSNicholas Bellinger " logout response to ISCSI_LOGOUT_SUCCESS.\n"); 2632e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2633e48354ceSNicholas Bellinger break; 2634e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: 2635e48354ceSNicholas Bellinger if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) 2636e48354ceSNicholas Bellinger break; 2637e48354ceSNicholas Bellinger /* 2638e48354ceSNicholas Bellinger * For CLOSECONNECTION logout requests carrying 2639e48354ceSNicholas Bellinger * a matching logout CID -> local CID, the reference 2640e48354ceSNicholas Bellinger * for the local CID will have been incremented in 2641e48354ceSNicholas Bellinger * iscsi_logout_closeconnection(). 2642e48354ceSNicholas Bellinger * 2643e48354ceSNicholas Bellinger * For CLOSECONNECTION logout requests carrying 2644e48354ceSNicholas Bellinger * a different CID than the connection it arrived 2645e48354ceSNicholas Bellinger * on, the connection responding to cmd->logout_cid 2646e48354ceSNicholas Bellinger * is stopped in iscsit_logout_post_handler_diffcid(). 2647e48354ceSNicholas Bellinger */ 2648e48354ceSNicholas Bellinger 2649e48354ceSNicholas Bellinger pr_debug("iSCSI CID: %hu logout on CID: %hu" 2650e48354ceSNicholas Bellinger " successful.\n", cmd->logout_cid, conn->cid); 2651e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2652e48354ceSNicholas Bellinger break; 2653e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_RECOVERY: 2654e48354ceSNicholas Bellinger if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || 2655e48354ceSNicholas Bellinger (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) 2656e48354ceSNicholas Bellinger break; 2657e48354ceSNicholas Bellinger /* 2658e48354ceSNicholas Bellinger * If the connection is still active from our point of view 2659e48354ceSNicholas Bellinger * force connection recovery to occur. 2660e48354ceSNicholas Bellinger */ 2661e48354ceSNicholas Bellinger logout_conn = iscsit_get_conn_from_cid_rcfr(sess, 2662e48354ceSNicholas Bellinger cmd->logout_cid); 2663ee1b1b9cSAndy Grover if (logout_conn) { 2664e48354ceSNicholas Bellinger iscsit_connection_reinstatement_rcfr(logout_conn); 2665e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(logout_conn); 2666e48354ceSNicholas Bellinger } 2667e48354ceSNicholas Bellinger 2668e48354ceSNicholas Bellinger cr = iscsit_get_inactive_connection_recovery_entry( 2669e48354ceSNicholas Bellinger conn->sess, cmd->logout_cid); 2670e48354ceSNicholas Bellinger if (!cr) { 2671e48354ceSNicholas Bellinger pr_err("Unable to locate CID: %hu for" 2672e48354ceSNicholas Bellinger " REMOVECONNFORRECOVERY Logout Request.\n", 2673e48354ceSNicholas Bellinger cmd->logout_cid); 2674e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; 2675e48354ceSNicholas Bellinger break; 2676e48354ceSNicholas Bellinger } 2677e48354ceSNicholas Bellinger 2678e48354ceSNicholas Bellinger iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); 2679e48354ceSNicholas Bellinger 2680e48354ceSNicholas Bellinger pr_debug("iSCSI REMOVECONNFORRECOVERY logout" 2681e48354ceSNicholas Bellinger " for recovery for CID: %hu on CID: %hu successful.\n", 2682e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2683e48354ceSNicholas Bellinger cmd->logout_response = ISCSI_LOGOUT_SUCCESS; 2684e48354ceSNicholas Bellinger break; 2685e48354ceSNicholas Bellinger default: 2686e48354ceSNicholas Bellinger pr_err("Unknown cmd->logout_reason: 0x%02x\n", 2687e48354ceSNicholas Bellinger cmd->logout_reason); 2688e48354ceSNicholas Bellinger return -1; 2689e48354ceSNicholas Bellinger } 2690e48354ceSNicholas Bellinger 2691e48354ceSNicholas Bellinger tx_size = ISCSI_HDR_LEN; 2692e48354ceSNicholas Bellinger hdr = (struct iscsi_logout_rsp *)cmd->pdu; 2693e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2694e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGOUT_RSP; 2695e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2696e48354ceSNicholas Bellinger hdr->response = cmd->logout_response; 269766c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 2698e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2699e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2700e48354ceSNicholas Bellinger 2701e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2702e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2703e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2704e48354ceSNicholas Bellinger 2705e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 2706e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->pdu; 2707e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_HDR_LEN; 2708e48354ceSNicholas Bellinger 2709e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2710e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2711e48354ceSNicholas Bellinger 2712e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2713e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2714e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2715e48354ceSNicholas Bellinger 2716e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2717e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2718e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2719e48354ceSNicholas Bellinger " Logout Response 0x%08x\n", *header_digest); 2720e48354ceSNicholas Bellinger } 2721e48354ceSNicholas Bellinger cmd->iov_misc_count = niov; 2722e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2723e48354ceSNicholas Bellinger 2724e48354ceSNicholas Bellinger pr_debug("Sending Logout Response ITT: 0x%08x StatSN:" 2725e48354ceSNicholas Bellinger " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", 2726e48354ceSNicholas Bellinger cmd->init_task_tag, cmd->stat_sn, hdr->response, 2727e48354ceSNicholas Bellinger cmd->logout_cid, conn->cid); 2728e48354ceSNicholas Bellinger 2729e48354ceSNicholas Bellinger return 0; 2730e48354ceSNicholas Bellinger } 2731e48354ceSNicholas Bellinger 2732e48354ceSNicholas Bellinger /* 2733e48354ceSNicholas Bellinger * Unsolicited NOPIN, either requesting a response or not. 2734e48354ceSNicholas Bellinger */ 2735e48354ceSNicholas Bellinger static int iscsit_send_unsolicited_nopin( 2736e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2737e48354ceSNicholas Bellinger struct iscsi_conn *conn, 2738e48354ceSNicholas Bellinger int want_response) 2739e48354ceSNicholas Bellinger { 2740e48354ceSNicholas Bellinger int tx_size = ISCSI_HDR_LEN; 2741e48354ceSNicholas Bellinger struct iscsi_nopin *hdr; 27426f3c0e69SAndy Grover int ret; 2743e48354ceSNicholas Bellinger 2744e48354ceSNicholas Bellinger hdr = (struct iscsi_nopin *) cmd->pdu; 2745e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2746e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_NOOP_IN; 2747e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 274866c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 2749e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 2750e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn; 2751e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2752e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2753e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2754e48354ceSNicholas Bellinger 2755e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2756e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2757e48354ceSNicholas Bellinger 2758e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2759e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2760e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2761e48354ceSNicholas Bellinger 2762e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2763e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest to" 2764e48354ceSNicholas Bellinger " NopIN 0x%08x\n", *header_digest); 2765e48354ceSNicholas Bellinger } 2766e48354ceSNicholas Bellinger 2767e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2768e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = tx_size; 2769e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2770e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2771e48354ceSNicholas Bellinger 2772e48354ceSNicholas Bellinger pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" 2773e48354ceSNicholas Bellinger " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); 2774e48354ceSNicholas Bellinger 27756f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 1); 27766f3c0e69SAndy Grover if (ret < 0) { 27776f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 27786f3c0e69SAndy Grover return ret; 27796f3c0e69SAndy Grover } 27806f3c0e69SAndy Grover 27816f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 27826f3c0e69SAndy Grover cmd->i_state = want_response ? 27836f3c0e69SAndy Grover ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; 27846f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 27856f3c0e69SAndy Grover 2786e48354ceSNicholas Bellinger return 0; 2787e48354ceSNicholas Bellinger } 2788e48354ceSNicholas Bellinger 2789e48354ceSNicholas Bellinger static int iscsit_send_nopin_response( 2790e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2791e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2792e48354ceSNicholas Bellinger { 2793e48354ceSNicholas Bellinger int niov = 0, tx_size; 2794e48354ceSNicholas Bellinger u32 padding = 0; 2795e48354ceSNicholas Bellinger struct kvec *iov; 2796e48354ceSNicholas Bellinger struct iscsi_nopin *hdr; 2797e48354ceSNicholas Bellinger 2798e48354ceSNicholas Bellinger tx_size = ISCSI_HDR_LEN; 2799e48354ceSNicholas Bellinger hdr = (struct iscsi_nopin *) cmd->pdu; 2800e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2801e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_NOOP_IN; 2802e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2803e48354ceSNicholas Bellinger hton24(hdr->dlength, cmd->buf_ptr_size); 2804e48354ceSNicholas Bellinger put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); 280566c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 2806e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 2807e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 2808e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 2809e48354ceSNicholas Bellinger 2810e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 2811e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2812e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2813e48354ceSNicholas Bellinger 2814e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 2815e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->pdu; 2816e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_HDR_LEN; 2817e48354ceSNicholas Bellinger 2818e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2819e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2820e48354ceSNicholas Bellinger 2821e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2822e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2823e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2824e48354ceSNicholas Bellinger 2825e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 2826e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2827e48354ceSNicholas Bellinger pr_debug("Attaching CRC32C HeaderDigest" 2828e48354ceSNicholas Bellinger " to NopIn 0x%08x\n", *header_digest); 2829e48354ceSNicholas Bellinger } 2830e48354ceSNicholas Bellinger 2831e48354ceSNicholas Bellinger /* 2832e48354ceSNicholas Bellinger * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. 2833e48354ceSNicholas Bellinger * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. 2834e48354ceSNicholas Bellinger */ 2835e48354ceSNicholas Bellinger if (cmd->buf_ptr_size) { 2836e48354ceSNicholas Bellinger iov[niov].iov_base = cmd->buf_ptr; 2837e48354ceSNicholas Bellinger iov[niov++].iov_len = cmd->buf_ptr_size; 2838e48354ceSNicholas Bellinger tx_size += cmd->buf_ptr_size; 2839e48354ceSNicholas Bellinger 2840e48354ceSNicholas Bellinger pr_debug("Echoing back %u bytes of ping" 2841e48354ceSNicholas Bellinger " data.\n", cmd->buf_ptr_size); 2842e48354ceSNicholas Bellinger 2843e48354ceSNicholas Bellinger padding = ((-cmd->buf_ptr_size) & 3); 2844e48354ceSNicholas Bellinger if (padding != 0) { 2845e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->pad_bytes; 2846e48354ceSNicholas Bellinger iov[niov++].iov_len = padding; 2847e48354ceSNicholas Bellinger tx_size += padding; 2848e48354ceSNicholas Bellinger pr_debug("Attaching %u additional" 2849e48354ceSNicholas Bellinger " padding bytes.\n", padding); 2850e48354ceSNicholas Bellinger } 2851e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 2852e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2853e48354ceSNicholas Bellinger cmd->buf_ptr, cmd->buf_ptr_size, 2854e48354ceSNicholas Bellinger padding, (u8 *)&cmd->pad_bytes, 2855e48354ceSNicholas Bellinger (u8 *)&cmd->data_crc); 2856e48354ceSNicholas Bellinger 2857e48354ceSNicholas Bellinger iov[niov].iov_base = &cmd->data_crc; 2858e48354ceSNicholas Bellinger iov[niov++].iov_len = ISCSI_CRC_LEN; 2859e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2860e48354ceSNicholas Bellinger pr_debug("Attached DataDigest for %u" 2861e48354ceSNicholas Bellinger " bytes of ping data, CRC 0x%08x\n", 2862e48354ceSNicholas Bellinger cmd->buf_ptr_size, cmd->data_crc); 2863e48354ceSNicholas Bellinger } 2864e48354ceSNicholas Bellinger } 2865e48354ceSNicholas Bellinger 2866e48354ceSNicholas Bellinger cmd->iov_misc_count = niov; 2867e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2868e48354ceSNicholas Bellinger 2869e48354ceSNicholas Bellinger pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:" 2870e48354ceSNicholas Bellinger " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag, 2871e48354ceSNicholas Bellinger cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); 2872e48354ceSNicholas Bellinger 2873e48354ceSNicholas Bellinger return 0; 2874e48354ceSNicholas Bellinger } 2875e48354ceSNicholas Bellinger 28766f3c0e69SAndy Grover static int iscsit_send_r2t( 2877e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2878e48354ceSNicholas Bellinger struct iscsi_conn *conn) 2879e48354ceSNicholas Bellinger { 2880e48354ceSNicholas Bellinger int tx_size = 0; 2881e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 2882e48354ceSNicholas Bellinger struct iscsi_r2t_rsp *hdr; 28836f3c0e69SAndy Grover int ret; 2884e48354ceSNicholas Bellinger 2885e48354ceSNicholas Bellinger r2t = iscsit_get_r2t_from_list(cmd); 2886e48354ceSNicholas Bellinger if (!r2t) 2887e48354ceSNicholas Bellinger return -1; 2888e48354ceSNicholas Bellinger 2889e48354ceSNicholas Bellinger hdr = (struct iscsi_r2t_rsp *) cmd->pdu; 2890e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 2891e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_R2T; 2892e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 2893e48354ceSNicholas Bellinger int_to_scsilun(cmd->se_cmd.orig_fe_lun, 2894e48354ceSNicholas Bellinger (struct scsi_lun *)&hdr->lun); 289566c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 2896e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 2897e48354ceSNicholas Bellinger r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; 2898e48354ceSNicholas Bellinger if (r2t->targ_xfer_tag == 0xFFFFFFFF) 2899e48354ceSNicholas Bellinger r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; 2900e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 2901e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); 2902e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(conn->stat_sn); 2903e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 2904e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 2905e48354ceSNicholas Bellinger hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); 2906e48354ceSNicholas Bellinger hdr->data_offset = cpu_to_be32(r2t->offset); 2907e48354ceSNicholas Bellinger hdr->data_length = cpu_to_be32(r2t->xfer_len); 2908e48354ceSNicholas Bellinger 2909e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 2910e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; 2911e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 2912e48354ceSNicholas Bellinger 2913e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 2914e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 2915e48354ceSNicholas Bellinger 2916e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 2917e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 2918e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 2919e48354ceSNicholas Bellinger 2920e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; 2921e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 2922e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for R2T" 2923e48354ceSNicholas Bellinger " PDU 0x%08x\n", *header_digest); 2924e48354ceSNicholas Bellinger } 2925e48354ceSNicholas Bellinger 2926e48354ceSNicholas Bellinger pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" 2927e48354ceSNicholas Bellinger " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", 2928e48354ceSNicholas Bellinger (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, 2929e48354ceSNicholas Bellinger r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, 2930e48354ceSNicholas Bellinger r2t->offset, r2t->xfer_len, conn->cid); 2931e48354ceSNicholas Bellinger 2932e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 2933e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 2934e48354ceSNicholas Bellinger 2935e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 2936e48354ceSNicholas Bellinger r2t->sent_r2t = 1; 2937e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 2938e48354ceSNicholas Bellinger 29396f3c0e69SAndy Grover ret = iscsit_send_tx_data(cmd, conn, 1); 29406f3c0e69SAndy Grover if (ret < 0) { 29416f3c0e69SAndy Grover iscsit_tx_thread_wait_for_tcp(conn); 29426f3c0e69SAndy Grover return ret; 29436f3c0e69SAndy Grover } 29446f3c0e69SAndy Grover 29456f3c0e69SAndy Grover spin_lock_bh(&cmd->dataout_timeout_lock); 29466f3c0e69SAndy Grover iscsit_start_dataout_timer(cmd, conn); 29476f3c0e69SAndy Grover spin_unlock_bh(&cmd->dataout_timeout_lock); 29486f3c0e69SAndy Grover 2949e48354ceSNicholas Bellinger return 0; 2950e48354ceSNicholas Bellinger } 2951e48354ceSNicholas Bellinger 2952e48354ceSNicholas Bellinger /* 29538b1e1244SAndy Grover * @recovery: If called from iscsi_task_reassign_complete_write() for 2954e48354ceSNicholas Bellinger * connection recovery. 2955e48354ceSNicholas Bellinger */ 2956e48354ceSNicholas Bellinger int iscsit_build_r2ts_for_cmd( 2957e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 2958e48354ceSNicholas Bellinger struct iscsi_conn *conn, 29598b1e1244SAndy Grover bool recovery) 2960e48354ceSNicholas Bellinger { 2961e48354ceSNicholas Bellinger int first_r2t = 1; 2962e48354ceSNicholas Bellinger u32 offset = 0, xfer_len = 0; 2963e48354ceSNicholas Bellinger 2964e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 2965e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { 2966e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 2967e48354ceSNicholas Bellinger return 0; 2968e48354ceSNicholas Bellinger } 2969e48354ceSNicholas Bellinger 29708b1e1244SAndy Grover if (conn->sess->sess_ops->DataSequenceInOrder && 29718b1e1244SAndy Grover !recovery) 2972c6037cc5SAndy Grover cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); 2973e48354ceSNicholas Bellinger 2974e48354ceSNicholas Bellinger while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { 2975e48354ceSNicholas Bellinger if (conn->sess->sess_ops->DataSequenceInOrder) { 2976e48354ceSNicholas Bellinger offset = cmd->r2t_offset; 2977e48354ceSNicholas Bellinger 29788b1e1244SAndy Grover if (first_r2t && recovery) { 29798b1e1244SAndy Grover int new_data_end = offset + 29808b1e1244SAndy Grover conn->sess->sess_ops->MaxBurstLength - 29818b1e1244SAndy Grover cmd->next_burst_len; 29828b1e1244SAndy Grover 2983ebf1d95cSAndy Grover if (new_data_end > cmd->se_cmd.data_length) 2984ebf1d95cSAndy Grover xfer_len = cmd->se_cmd.data_length - offset; 29858b1e1244SAndy Grover else 29868b1e1244SAndy Grover xfer_len = 29878b1e1244SAndy Grover conn->sess->sess_ops->MaxBurstLength - 29888b1e1244SAndy Grover cmd->next_burst_len; 2989e48354ceSNicholas Bellinger } else { 29908b1e1244SAndy Grover int new_data_end = offset + 2991e48354ceSNicholas Bellinger conn->sess->sess_ops->MaxBurstLength; 29928b1e1244SAndy Grover 2993ebf1d95cSAndy Grover if (new_data_end > cmd->se_cmd.data_length) 2994ebf1d95cSAndy Grover xfer_len = cmd->se_cmd.data_length - offset; 29958b1e1244SAndy Grover else 29968b1e1244SAndy Grover xfer_len = conn->sess->sess_ops->MaxBurstLength; 2997e48354ceSNicholas Bellinger } 2998e48354ceSNicholas Bellinger cmd->r2t_offset += xfer_len; 2999e48354ceSNicholas Bellinger 3000ebf1d95cSAndy Grover if (cmd->r2t_offset == cmd->se_cmd.data_length) 3001e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_SENT_LAST_R2T; 3002e48354ceSNicholas Bellinger } else { 3003e48354ceSNicholas Bellinger struct iscsi_seq *seq; 3004e48354ceSNicholas Bellinger 3005e48354ceSNicholas Bellinger seq = iscsit_get_seq_holder_for_r2t(cmd); 3006e48354ceSNicholas Bellinger if (!seq) { 3007e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3008e48354ceSNicholas Bellinger return -1; 3009e48354ceSNicholas Bellinger } 3010e48354ceSNicholas Bellinger 3011e48354ceSNicholas Bellinger offset = seq->offset; 3012e48354ceSNicholas Bellinger xfer_len = seq->xfer_len; 3013e48354ceSNicholas Bellinger 3014e48354ceSNicholas Bellinger if (cmd->seq_send_order == cmd->seq_count) 3015e48354ceSNicholas Bellinger cmd->cmd_flags |= ICF_SENT_LAST_R2T; 3016e48354ceSNicholas Bellinger } 3017e48354ceSNicholas Bellinger cmd->outstanding_r2ts++; 3018e48354ceSNicholas Bellinger first_r2t = 0; 3019e48354ceSNicholas Bellinger 3020e48354ceSNicholas Bellinger if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { 3021e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3022e48354ceSNicholas Bellinger return -1; 3023e48354ceSNicholas Bellinger } 3024e48354ceSNicholas Bellinger 3025e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_SENT_LAST_R2T) 3026e48354ceSNicholas Bellinger break; 3027e48354ceSNicholas Bellinger } 3028e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 3029e48354ceSNicholas Bellinger 3030e48354ceSNicholas Bellinger return 0; 3031e48354ceSNicholas Bellinger } 3032e48354ceSNicholas Bellinger 3033e48354ceSNicholas Bellinger static int iscsit_send_status( 3034e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3035e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3036e48354ceSNicholas Bellinger { 3037e48354ceSNicholas Bellinger u8 iov_count = 0, recovery; 3038e48354ceSNicholas Bellinger u32 padding = 0, tx_size = 0; 3039e48354ceSNicholas Bellinger struct iscsi_scsi_rsp *hdr; 3040e48354ceSNicholas Bellinger struct kvec *iov; 3041e48354ceSNicholas Bellinger 3042e48354ceSNicholas Bellinger recovery = (cmd->i_state != ISTATE_SEND_STATUS); 3043e48354ceSNicholas Bellinger if (!recovery) 3044e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3045e48354ceSNicholas Bellinger 3046e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 3047e48354ceSNicholas Bellinger conn->sess->rsp_pdus++; 3048e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 3049e48354ceSNicholas Bellinger 3050e48354ceSNicholas Bellinger hdr = (struct iscsi_scsi_rsp *) cmd->pdu; 3051e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3052e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; 3053e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3054e48354ceSNicholas Bellinger if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { 3055e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; 30567e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 3057e48354ceSNicholas Bellinger } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { 3058e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 30597e46cf02SNicholas Bellinger hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); 3060e48354ceSNicholas Bellinger } 3061e48354ceSNicholas Bellinger hdr->response = cmd->iscsi_response; 3062e48354ceSNicholas Bellinger hdr->cmd_status = cmd->se_cmd.scsi_status; 306366c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 3064e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3065e48354ceSNicholas Bellinger 3066e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3067e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3068e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3069e48354ceSNicholas Bellinger 3070e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3071e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3072e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3073e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 3074e48354ceSNicholas Bellinger 3075e48354ceSNicholas Bellinger /* 3076e48354ceSNicholas Bellinger * Attach SENSE DATA payload to iSCSI Response PDU 3077e48354ceSNicholas Bellinger */ 3078e48354ceSNicholas Bellinger if (cmd->se_cmd.sense_buffer && 3079e48354ceSNicholas Bellinger ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 3080e48354ceSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 30819c58b7ddSRoland Dreier put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); 30829c58b7ddSRoland Dreier cmd->se_cmd.scsi_sense_length += sizeof (__be16); 30839c58b7ddSRoland Dreier 3084e48354ceSNicholas Bellinger padding = -(cmd->se_cmd.scsi_sense_length) & 3; 308550e5c87dSChristoph Hellwig hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); 30869c58b7ddSRoland Dreier iov[iov_count].iov_base = cmd->sense_buffer; 3087e48354ceSNicholas Bellinger iov[iov_count++].iov_len = 3088e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding); 3089e48354ceSNicholas Bellinger tx_size += cmd->se_cmd.scsi_sense_length; 3090e48354ceSNicholas Bellinger 3091e48354ceSNicholas Bellinger if (padding) { 30929c58b7ddSRoland Dreier memset(cmd->sense_buffer + 3093e48354ceSNicholas Bellinger cmd->se_cmd.scsi_sense_length, 0, padding); 3094e48354ceSNicholas Bellinger tx_size += padding; 3095e48354ceSNicholas Bellinger pr_debug("Adding %u bytes of padding to" 3096e48354ceSNicholas Bellinger " SENSE.\n", padding); 3097e48354ceSNicholas Bellinger } 3098e48354ceSNicholas Bellinger 3099e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3100e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 31019c58b7ddSRoland Dreier cmd->sense_buffer, 3102e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding), 3103e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3104e48354ceSNicholas Bellinger 3105e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3106e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3107e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3108e48354ceSNicholas Bellinger 3109e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 DataDigest for" 3110e48354ceSNicholas Bellinger " SENSE, %u bytes CRC 0x%08x\n", 3111e48354ceSNicholas Bellinger (cmd->se_cmd.scsi_sense_length + padding), 3112e48354ceSNicholas Bellinger cmd->data_crc); 3113e48354ceSNicholas Bellinger } 3114e48354ceSNicholas Bellinger 3115e48354ceSNicholas Bellinger pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" 3116e48354ceSNicholas Bellinger " Response PDU\n", 3117e48354ceSNicholas Bellinger cmd->se_cmd.scsi_sense_length); 3118e48354ceSNicholas Bellinger } 3119e48354ceSNicholas Bellinger 3120e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3121e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3122e48354ceSNicholas Bellinger 3123e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3124e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3125e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3126e48354ceSNicholas Bellinger 3127e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3128e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3129e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for Response" 3130e48354ceSNicholas Bellinger " PDU 0x%08x\n", *header_digest); 3131e48354ceSNicholas Bellinger } 3132e48354ceSNicholas Bellinger 3133e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3134e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3135e48354ceSNicholas Bellinger 3136e48354ceSNicholas Bellinger pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x," 3137e48354ceSNicholas Bellinger " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", 3138e48354ceSNicholas Bellinger (!recovery) ? "" : "Recovery ", cmd->init_task_tag, 3139e48354ceSNicholas Bellinger cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid); 3140e48354ceSNicholas Bellinger 3141e48354ceSNicholas Bellinger return 0; 3142e48354ceSNicholas Bellinger } 3143e48354ceSNicholas Bellinger 3144e48354ceSNicholas Bellinger static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) 3145e48354ceSNicholas Bellinger { 3146e48354ceSNicholas Bellinger switch (se_tmr->response) { 3147e48354ceSNicholas Bellinger case TMR_FUNCTION_COMPLETE: 3148e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_COMPLETE; 3149e48354ceSNicholas Bellinger case TMR_TASK_DOES_NOT_EXIST: 3150e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NO_TASK; 3151e48354ceSNicholas Bellinger case TMR_LUN_DOES_NOT_EXIST: 3152e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NO_LUN; 3153e48354ceSNicholas Bellinger case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: 3154e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_NOT_SUPPORTED; 3155e48354ceSNicholas Bellinger case TMR_FUNCTION_AUTHORIZATION_FAILED: 3156e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_AUTH_FAILED; 3157e48354ceSNicholas Bellinger case TMR_FUNCTION_REJECTED: 3158e48354ceSNicholas Bellinger default: 3159e48354ceSNicholas Bellinger return ISCSI_TMF_RSP_REJECTED; 3160e48354ceSNicholas Bellinger } 3161e48354ceSNicholas Bellinger } 3162e48354ceSNicholas Bellinger 3163e48354ceSNicholas Bellinger static int iscsit_send_task_mgt_rsp( 3164e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3165e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3166e48354ceSNicholas Bellinger { 3167e48354ceSNicholas Bellinger struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; 3168e48354ceSNicholas Bellinger struct iscsi_tm_rsp *hdr; 3169e48354ceSNicholas Bellinger u32 tx_size = 0; 3170e48354ceSNicholas Bellinger 3171e48354ceSNicholas Bellinger hdr = (struct iscsi_tm_rsp *) cmd->pdu; 3172e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3173e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; 31747ae0b103SNicholas Bellinger hdr->flags = ISCSI_FLAG_CMD_FINAL; 3175e48354ceSNicholas Bellinger hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); 317666c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 3177e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3178e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3179e48354ceSNicholas Bellinger 3180e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3181e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3182e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3183e48354ceSNicholas Bellinger 3184e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_base = cmd->pdu; 3185e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; 3186e48354ceSNicholas Bellinger tx_size += ISCSI_HDR_LEN; 3187e48354ceSNicholas Bellinger 3188e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3189e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3190e48354ceSNicholas Bellinger 3191e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3192e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3193e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3194e48354ceSNicholas Bellinger 3195e48354ceSNicholas Bellinger cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; 3196e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3197e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for Task" 3198e48354ceSNicholas Bellinger " Mgmt Response PDU 0x%08x\n", *header_digest); 3199e48354ceSNicholas Bellinger } 3200e48354ceSNicholas Bellinger 3201e48354ceSNicholas Bellinger cmd->iov_misc_count = 1; 3202e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3203e48354ceSNicholas Bellinger 3204e48354ceSNicholas Bellinger pr_debug("Built Task Management Response ITT: 0x%08x," 3205e48354ceSNicholas Bellinger " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", 3206e48354ceSNicholas Bellinger cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); 3207e48354ceSNicholas Bellinger 3208e48354ceSNicholas Bellinger return 0; 3209e48354ceSNicholas Bellinger } 3210e48354ceSNicholas Bellinger 32112f9bc894SNicholas Bellinger static bool iscsit_check_inaddr_any(struct iscsi_np *np) 32122f9bc894SNicholas Bellinger { 32132f9bc894SNicholas Bellinger bool ret = false; 32142f9bc894SNicholas Bellinger 32152f9bc894SNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 32162f9bc894SNicholas Bellinger const struct sockaddr_in6 sin6 = { 32172f9bc894SNicholas Bellinger .sin6_addr = IN6ADDR_ANY_INIT }; 32182f9bc894SNicholas Bellinger struct sockaddr_in6 *sock_in6 = 32192f9bc894SNicholas Bellinger (struct sockaddr_in6 *)&np->np_sockaddr; 32202f9bc894SNicholas Bellinger 32212f9bc894SNicholas Bellinger if (!memcmp(sock_in6->sin6_addr.s6_addr, 32222f9bc894SNicholas Bellinger sin6.sin6_addr.s6_addr, 16)) 32232f9bc894SNicholas Bellinger ret = true; 32242f9bc894SNicholas Bellinger } else { 32252f9bc894SNicholas Bellinger struct sockaddr_in * sock_in = 32262f9bc894SNicholas Bellinger (struct sockaddr_in *)&np->np_sockaddr; 32272f9bc894SNicholas Bellinger 3228cea0b4ceSChristoph Hellwig if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) 32292f9bc894SNicholas Bellinger ret = true; 32302f9bc894SNicholas Bellinger } 32312f9bc894SNicholas Bellinger 32322f9bc894SNicholas Bellinger return ret; 32332f9bc894SNicholas Bellinger } 32342f9bc894SNicholas Bellinger 32358b1e1244SAndy Grover #define SENDTARGETS_BUF_LIMIT 32768U 32368b1e1244SAndy Grover 3237e48354ceSNicholas Bellinger static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) 3238e48354ceSNicholas Bellinger { 3239e48354ceSNicholas Bellinger char *payload = NULL; 3240e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 3241e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 3242e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 3243e48354ceSNicholas Bellinger struct iscsi_tpg_np *tpg_np; 3244e48354ceSNicholas Bellinger int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; 32458b1e1244SAndy Grover unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ 3246e48354ceSNicholas Bellinger 32478b1e1244SAndy Grover buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, 32488b1e1244SAndy Grover SENDTARGETS_BUF_LIMIT); 3249e48354ceSNicholas Bellinger 3250e48354ceSNicholas Bellinger payload = kzalloc(buffer_len, GFP_KERNEL); 3251e48354ceSNicholas Bellinger if (!payload) { 3252e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for sendtargets" 3253e48354ceSNicholas Bellinger " response.\n"); 3254e48354ceSNicholas Bellinger return -ENOMEM; 3255e48354ceSNicholas Bellinger } 3256e48354ceSNicholas Bellinger 3257e48354ceSNicholas Bellinger spin_lock(&tiqn_lock); 3258e48354ceSNicholas Bellinger list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { 3259e48354ceSNicholas Bellinger len = sprintf(buf, "TargetName=%s", tiqn->tiqn); 3260e48354ceSNicholas Bellinger len += 1; 3261e48354ceSNicholas Bellinger 3262e48354ceSNicholas Bellinger if ((len + payload_len) > buffer_len) { 3263e48354ceSNicholas Bellinger end_of_buf = 1; 3264e48354ceSNicholas Bellinger goto eob; 3265e48354ceSNicholas Bellinger } 32668359cf43SJörn Engel memcpy(payload + payload_len, buf, len); 3267e48354ceSNicholas Bellinger payload_len += len; 3268e48354ceSNicholas Bellinger 3269e48354ceSNicholas Bellinger spin_lock(&tiqn->tiqn_tpg_lock); 3270e48354ceSNicholas Bellinger list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { 3271e48354ceSNicholas Bellinger 3272e48354ceSNicholas Bellinger spin_lock(&tpg->tpg_state_lock); 3273e48354ceSNicholas Bellinger if ((tpg->tpg_state == TPG_STATE_FREE) || 3274e48354ceSNicholas Bellinger (tpg->tpg_state == TPG_STATE_INACTIVE)) { 3275e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_state_lock); 3276e48354ceSNicholas Bellinger continue; 3277e48354ceSNicholas Bellinger } 3278e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_state_lock); 3279e48354ceSNicholas Bellinger 3280e48354ceSNicholas Bellinger spin_lock(&tpg->tpg_np_lock); 3281e48354ceSNicholas Bellinger list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, 3282e48354ceSNicholas Bellinger tpg_np_list) { 32832f9bc894SNicholas Bellinger struct iscsi_np *np = tpg_np->tpg_np; 32842f9bc894SNicholas Bellinger bool inaddr_any = iscsit_check_inaddr_any(np); 32852f9bc894SNicholas Bellinger 3286e48354ceSNicholas Bellinger len = sprintf(buf, "TargetAddress=" 3287e48354ceSNicholas Bellinger "%s%s%s:%hu,%hu", 32882f9bc894SNicholas Bellinger (np->np_sockaddr.ss_family == AF_INET6) ? 32892f9bc894SNicholas Bellinger "[" : "", (inaddr_any == false) ? 32902f9bc894SNicholas Bellinger np->np_ip : conn->local_ip, 32912f9bc894SNicholas Bellinger (np->np_sockaddr.ss_family == AF_INET6) ? 32922f9bc894SNicholas Bellinger "]" : "", (inaddr_any == false) ? 32932f9bc894SNicholas Bellinger np->np_port : conn->local_port, 3294e48354ceSNicholas Bellinger tpg->tpgt); 3295e48354ceSNicholas Bellinger len += 1; 3296e48354ceSNicholas Bellinger 3297e48354ceSNicholas Bellinger if ((len + payload_len) > buffer_len) { 3298e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_np_lock); 3299e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_tpg_lock); 3300e48354ceSNicholas Bellinger end_of_buf = 1; 3301e48354ceSNicholas Bellinger goto eob; 3302e48354ceSNicholas Bellinger } 33038359cf43SJörn Engel memcpy(payload + payload_len, buf, len); 3304e48354ceSNicholas Bellinger payload_len += len; 3305e48354ceSNicholas Bellinger } 3306e48354ceSNicholas Bellinger spin_unlock(&tpg->tpg_np_lock); 3307e48354ceSNicholas Bellinger } 3308e48354ceSNicholas Bellinger spin_unlock(&tiqn->tiqn_tpg_lock); 3309e48354ceSNicholas Bellinger eob: 3310e48354ceSNicholas Bellinger if (end_of_buf) 3311e48354ceSNicholas Bellinger break; 3312e48354ceSNicholas Bellinger } 3313e48354ceSNicholas Bellinger spin_unlock(&tiqn_lock); 3314e48354ceSNicholas Bellinger 3315e48354ceSNicholas Bellinger cmd->buf_ptr = payload; 3316e48354ceSNicholas Bellinger 3317e48354ceSNicholas Bellinger return payload_len; 3318e48354ceSNicholas Bellinger } 3319e48354ceSNicholas Bellinger 3320e48354ceSNicholas Bellinger /* 3321e48354ceSNicholas Bellinger * FIXME: Add support for F_BIT and C_BIT when the length is longer than 3322e48354ceSNicholas Bellinger * MaxRecvDataSegmentLength. 3323e48354ceSNicholas Bellinger */ 3324e48354ceSNicholas Bellinger static int iscsit_send_text_rsp( 3325e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3326e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3327e48354ceSNicholas Bellinger { 3328e48354ceSNicholas Bellinger struct iscsi_text_rsp *hdr; 3329e48354ceSNicholas Bellinger struct kvec *iov; 3330e48354ceSNicholas Bellinger u32 padding = 0, tx_size = 0; 3331e48354ceSNicholas Bellinger int text_length, iov_count = 0; 3332e48354ceSNicholas Bellinger 3333e48354ceSNicholas Bellinger text_length = iscsit_build_sendtargets_response(cmd); 3334e48354ceSNicholas Bellinger if (text_length < 0) 3335e48354ceSNicholas Bellinger return text_length; 3336e48354ceSNicholas Bellinger 3337e48354ceSNicholas Bellinger padding = ((-text_length) & 3); 3338e48354ceSNicholas Bellinger if (padding != 0) { 3339e48354ceSNicholas Bellinger memset(cmd->buf_ptr + text_length, 0, padding); 3340e48354ceSNicholas Bellinger pr_debug("Attaching %u additional bytes for" 3341e48354ceSNicholas Bellinger " padding.\n", padding); 3342e48354ceSNicholas Bellinger } 3343e48354ceSNicholas Bellinger 3344e48354ceSNicholas Bellinger hdr = (struct iscsi_text_rsp *) cmd->pdu; 3345e48354ceSNicholas Bellinger memset(hdr, 0, ISCSI_HDR_LEN); 3346e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_TEXT_RSP; 3347e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3348e48354ceSNicholas Bellinger hton24(hdr->dlength, text_length); 334966c7db68SChristoph Hellwig hdr->itt = cmd->init_task_tag; 3350e48354ceSNicholas Bellinger hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); 3351e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3352e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3353e48354ceSNicholas Bellinger 3354e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, conn->sess); 3355e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3356e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3357e48354ceSNicholas Bellinger 3358e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3359e48354ceSNicholas Bellinger 3360e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3361e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3362e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->buf_ptr; 3363e48354ceSNicholas Bellinger iov[iov_count++].iov_len = text_length + padding; 3364e48354ceSNicholas Bellinger 3365e48354ceSNicholas Bellinger tx_size += (ISCSI_HDR_LEN + text_length + padding); 3366e48354ceSNicholas Bellinger 3367e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3368e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3369e48354ceSNicholas Bellinger 3370e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3371e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3372e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3373e48354ceSNicholas Bellinger 3374e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3375e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3376e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for" 3377e48354ceSNicholas Bellinger " Text Response PDU 0x%08x\n", *header_digest); 3378e48354ceSNicholas Bellinger } 3379e48354ceSNicholas Bellinger 3380e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3381e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3382e48354ceSNicholas Bellinger cmd->buf_ptr, (text_length + padding), 3383e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3384e48354ceSNicholas Bellinger 3385e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3386e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3387e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3388e48354ceSNicholas Bellinger 3389e48354ceSNicholas Bellinger pr_debug("Attaching DataDigest for %u bytes of text" 3390e48354ceSNicholas Bellinger " data, CRC 0x%08x\n", (text_length + padding), 3391e48354ceSNicholas Bellinger cmd->data_crc); 3392e48354ceSNicholas Bellinger } 3393e48354ceSNicholas Bellinger 3394e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3395e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3396e48354ceSNicholas Bellinger 3397e48354ceSNicholas Bellinger pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," 3398e48354ceSNicholas Bellinger " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, 3399e48354ceSNicholas Bellinger text_length, conn->cid); 3400e48354ceSNicholas Bellinger return 0; 3401e48354ceSNicholas Bellinger } 3402e48354ceSNicholas Bellinger 3403e48354ceSNicholas Bellinger static int iscsit_send_reject( 3404e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 3405e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3406e48354ceSNicholas Bellinger { 3407e48354ceSNicholas Bellinger u32 iov_count = 0, tx_size = 0; 3408e48354ceSNicholas Bellinger struct iscsi_reject *hdr; 3409e48354ceSNicholas Bellinger struct kvec *iov; 3410e48354ceSNicholas Bellinger 3411e48354ceSNicholas Bellinger hdr = (struct iscsi_reject *) cmd->pdu; 3412e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_REJECT; 3413e48354ceSNicholas Bellinger hdr->flags |= ISCSI_FLAG_CMD_FINAL; 3414e48354ceSNicholas Bellinger hton24(hdr->dlength, ISCSI_HDR_LEN); 341550e5c87dSChristoph Hellwig hdr->ffffffff = cpu_to_be32(0xffffffff); 3416e48354ceSNicholas Bellinger cmd->stat_sn = conn->stat_sn++; 3417e48354ceSNicholas Bellinger hdr->statsn = cpu_to_be32(cmd->stat_sn); 3418e48354ceSNicholas Bellinger hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); 3419e48354ceSNicholas Bellinger hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); 3420e48354ceSNicholas Bellinger 3421e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 3422e48354ceSNicholas Bellinger 3423e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->pdu; 3424e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3425e48354ceSNicholas Bellinger iov[iov_count].iov_base = cmd->buf_ptr; 3426e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_HDR_LEN; 3427e48354ceSNicholas Bellinger 3428e48354ceSNicholas Bellinger tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); 3429e48354ceSNicholas Bellinger 3430e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3431e48354ceSNicholas Bellinger u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; 3432e48354ceSNicholas Bellinger 3433e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3434e48354ceSNicholas Bellinger (unsigned char *)hdr, ISCSI_HDR_LEN, 3435e48354ceSNicholas Bellinger 0, NULL, (u8 *)header_digest); 3436e48354ceSNicholas Bellinger 3437e48354ceSNicholas Bellinger iov[0].iov_len += ISCSI_CRC_LEN; 3438e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3439e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 HeaderDigest for" 3440e48354ceSNicholas Bellinger " REJECT PDU 0x%08x\n", *header_digest); 3441e48354ceSNicholas Bellinger } 3442e48354ceSNicholas Bellinger 3443e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 3444e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, 3445e48354ceSNicholas Bellinger (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, 3446e48354ceSNicholas Bellinger 0, NULL, (u8 *)&cmd->data_crc); 3447e48354ceSNicholas Bellinger 3448e48354ceSNicholas Bellinger iov[iov_count].iov_base = &cmd->data_crc; 3449e48354ceSNicholas Bellinger iov[iov_count++].iov_len = ISCSI_CRC_LEN; 3450e48354ceSNicholas Bellinger tx_size += ISCSI_CRC_LEN; 3451e48354ceSNicholas Bellinger pr_debug("Attaching CRC32 DataDigest for REJECT" 3452e48354ceSNicholas Bellinger " PDU 0x%08x\n", cmd->data_crc); 3453e48354ceSNicholas Bellinger } 3454e48354ceSNicholas Bellinger 3455e48354ceSNicholas Bellinger cmd->iov_misc_count = iov_count; 3456e48354ceSNicholas Bellinger cmd->tx_size = tx_size; 3457e48354ceSNicholas Bellinger 3458e48354ceSNicholas Bellinger pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," 3459e48354ceSNicholas Bellinger " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); 3460e48354ceSNicholas Bellinger 3461e48354ceSNicholas Bellinger return 0; 3462e48354ceSNicholas Bellinger } 3463e48354ceSNicholas Bellinger 3464e48354ceSNicholas Bellinger void iscsit_thread_get_cpumask(struct iscsi_conn *conn) 3465e48354ceSNicholas Bellinger { 3466e48354ceSNicholas Bellinger struct iscsi_thread_set *ts = conn->thread_set; 3467e48354ceSNicholas Bellinger int ord, cpu; 3468e48354ceSNicholas Bellinger /* 3469e48354ceSNicholas Bellinger * thread_id is assigned from iscsit_global->ts_bitmap from 3470e48354ceSNicholas Bellinger * within iscsi_thread_set.c:iscsi_allocate_thread_sets() 3471e48354ceSNicholas Bellinger * 3472e48354ceSNicholas Bellinger * Here we use thread_id to determine which CPU that this 3473e48354ceSNicholas Bellinger * iSCSI connection's iscsi_thread_set will be scheduled to 3474e48354ceSNicholas Bellinger * execute upon. 3475e48354ceSNicholas Bellinger */ 3476e48354ceSNicholas Bellinger ord = ts->thread_id % cpumask_weight(cpu_online_mask); 3477e48354ceSNicholas Bellinger for_each_online_cpu(cpu) { 3478e48354ceSNicholas Bellinger if (ord-- == 0) { 3479e48354ceSNicholas Bellinger cpumask_set_cpu(cpu, conn->conn_cpumask); 3480e48354ceSNicholas Bellinger return; 3481e48354ceSNicholas Bellinger } 3482e48354ceSNicholas Bellinger } 3483e48354ceSNicholas Bellinger /* 3484e48354ceSNicholas Bellinger * This should never be reached.. 3485e48354ceSNicholas Bellinger */ 3486e48354ceSNicholas Bellinger dump_stack(); 3487e48354ceSNicholas Bellinger cpumask_setall(conn->conn_cpumask); 3488e48354ceSNicholas Bellinger } 3489e48354ceSNicholas Bellinger 3490e48354ceSNicholas Bellinger static inline void iscsit_thread_check_cpumask( 3491e48354ceSNicholas Bellinger struct iscsi_conn *conn, 3492e48354ceSNicholas Bellinger struct task_struct *p, 3493e48354ceSNicholas Bellinger int mode) 3494e48354ceSNicholas Bellinger { 3495e48354ceSNicholas Bellinger char buf[128]; 3496e48354ceSNicholas Bellinger /* 3497e48354ceSNicholas Bellinger * mode == 1 signals iscsi_target_tx_thread() usage. 3498e48354ceSNicholas Bellinger * mode == 0 signals iscsi_target_rx_thread() usage. 3499e48354ceSNicholas Bellinger */ 3500e48354ceSNicholas Bellinger if (mode == 1) { 3501e48354ceSNicholas Bellinger if (!conn->conn_tx_reset_cpumask) 3502e48354ceSNicholas Bellinger return; 3503e48354ceSNicholas Bellinger conn->conn_tx_reset_cpumask = 0; 3504e48354ceSNicholas Bellinger } else { 3505e48354ceSNicholas Bellinger if (!conn->conn_rx_reset_cpumask) 3506e48354ceSNicholas Bellinger return; 3507e48354ceSNicholas Bellinger conn->conn_rx_reset_cpumask = 0; 3508e48354ceSNicholas Bellinger } 3509e48354ceSNicholas Bellinger /* 3510e48354ceSNicholas Bellinger * Update the CPU mask for this single kthread so that 3511e48354ceSNicholas Bellinger * both TX and RX kthreads are scheduled to run on the 3512e48354ceSNicholas Bellinger * same CPU. 3513e48354ceSNicholas Bellinger */ 3514e48354ceSNicholas Bellinger memset(buf, 0, 128); 3515e48354ceSNicholas Bellinger cpumask_scnprintf(buf, 128, conn->conn_cpumask); 3516e48354ceSNicholas Bellinger set_cpus_allowed_ptr(p, conn->conn_cpumask); 3517e48354ceSNicholas Bellinger } 3518e48354ceSNicholas Bellinger 35196f3c0e69SAndy Grover static int handle_immediate_queue(struct iscsi_conn *conn) 3520e48354ceSNicholas Bellinger { 35216f3c0e69SAndy Grover struct iscsi_queue_req *qr; 35226f3c0e69SAndy Grover struct iscsi_cmd *cmd; 3523e48354ceSNicholas Bellinger u8 state; 35246f3c0e69SAndy Grover int ret; 3525e48354ceSNicholas Bellinger 3526c6037cc5SAndy Grover while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { 3527e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 0); 3528e48354ceSNicholas Bellinger cmd = qr->cmd; 3529e48354ceSNicholas Bellinger state = qr->state; 3530e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 3531e48354ceSNicholas Bellinger 3532e48354ceSNicholas Bellinger switch (state) { 3533e48354ceSNicholas Bellinger case ISTATE_SEND_R2T: 3534e48354ceSNicholas Bellinger ret = iscsit_send_r2t(cmd, conn); 35356f3c0e69SAndy Grover if (ret < 0) 35366f3c0e69SAndy Grover goto err; 3537e48354ceSNicholas Bellinger break; 3538e48354ceSNicholas Bellinger case ISTATE_REMOVE: 3539e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 3540e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 3541e48354ceSNicholas Bellinger 3542e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 35432fbb471eSAndy Grover list_del(&cmd->i_conn_node); 3544e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3545d270190aSNicholas Bellinger 3546d270190aSNicholas Bellinger iscsit_free_cmd(cmd); 3547c6037cc5SAndy Grover continue; 3548e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN_WANT_RESPONSE: 3549e48354ceSNicholas Bellinger iscsit_mod_nopin_response_timer(conn); 3550e48354ceSNicholas Bellinger ret = iscsit_send_unsolicited_nopin(cmd, 3551e48354ceSNicholas Bellinger conn, 1); 35526f3c0e69SAndy Grover if (ret < 0) 35536f3c0e69SAndy Grover goto err; 3554e48354ceSNicholas Bellinger break; 3555e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN_NO_RESPONSE: 3556e48354ceSNicholas Bellinger ret = iscsit_send_unsolicited_nopin(cmd, 3557e48354ceSNicholas Bellinger conn, 0); 35586f3c0e69SAndy Grover if (ret < 0) 35596f3c0e69SAndy Grover goto err; 3560e48354ceSNicholas Bellinger break; 3561e48354ceSNicholas Bellinger default: 3562e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3563e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3564e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, state, 3565e48354ceSNicholas Bellinger conn->cid); 35666f3c0e69SAndy Grover goto err; 3567e48354ceSNicholas Bellinger } 3568e48354ceSNicholas Bellinger } 3569e48354ceSNicholas Bellinger 35706f3c0e69SAndy Grover return 0; 35716f3c0e69SAndy Grover 35726f3c0e69SAndy Grover err: 35736f3c0e69SAndy Grover return -1; 3574e48354ceSNicholas Bellinger } 35756f3c0e69SAndy Grover 35766f3c0e69SAndy Grover static int handle_response_queue(struct iscsi_conn *conn) 35776f3c0e69SAndy Grover { 35786f3c0e69SAndy Grover struct iscsi_queue_req *qr; 35796f3c0e69SAndy Grover struct iscsi_cmd *cmd; 35806f3c0e69SAndy Grover u8 state; 35816f3c0e69SAndy Grover int ret; 3582e48354ceSNicholas Bellinger 3583c6037cc5SAndy Grover while ((qr = iscsit_get_cmd_from_response_queue(conn))) { 3584e48354ceSNicholas Bellinger cmd = qr->cmd; 3585e48354ceSNicholas Bellinger state = qr->state; 3586e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 3587e48354ceSNicholas Bellinger 3588e48354ceSNicholas Bellinger check_rsp_state: 3589e48354ceSNicholas Bellinger switch (state) { 3590e48354ceSNicholas Bellinger case ISTATE_SEND_DATAIN: 35916f3c0e69SAndy Grover ret = iscsit_send_data_in(cmd, conn); 35926f3c0e69SAndy Grover if (ret < 0) 35936f3c0e69SAndy Grover goto err; 35946f3c0e69SAndy Grover else if (!ret) 35956f3c0e69SAndy Grover /* more drs */ 35966f3c0e69SAndy Grover goto check_rsp_state; 35976f3c0e69SAndy Grover else if (ret == 1) { 35986f3c0e69SAndy Grover /* all done */ 35996f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36006f3c0e69SAndy Grover cmd->i_state = ISTATE_SENT_STATUS; 3601e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 3602fd3a9025SNicholas Bellinger 3603fd3a9025SNicholas Bellinger if (atomic_read(&conn->check_immediate_queue)) 3604fd3a9025SNicholas Bellinger return 1; 3605fd3a9025SNicholas Bellinger 36066f3c0e69SAndy Grover continue; 36076f3c0e69SAndy Grover } else if (ret == 2) { 36086f3c0e69SAndy Grover /* Still must send status, 36096f3c0e69SAndy Grover SCF_TRANSPORT_TASK_SENSE was set */ 36106f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36116f3c0e69SAndy Grover cmd->i_state = ISTATE_SEND_STATUS; 36126f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 36136f3c0e69SAndy Grover state = ISTATE_SEND_STATUS; 36146f3c0e69SAndy Grover goto check_rsp_state; 36156f3c0e69SAndy Grover } 36166f3c0e69SAndy Grover 3617e48354ceSNicholas Bellinger break; 3618e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS: 3619e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS_RECOVERY: 3620e48354ceSNicholas Bellinger ret = iscsit_send_status(cmd, conn); 3621e48354ceSNicholas Bellinger break; 3622e48354ceSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 3623e48354ceSNicholas Bellinger ret = iscsit_send_logout_response(cmd, conn); 3624e48354ceSNicholas Bellinger break; 3625e48354ceSNicholas Bellinger case ISTATE_SEND_ASYNCMSG: 3626e48354ceSNicholas Bellinger ret = iscsit_send_conn_drop_async_message( 3627e48354ceSNicholas Bellinger cmd, conn); 3628e48354ceSNicholas Bellinger break; 3629e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN: 3630e48354ceSNicholas Bellinger ret = iscsit_send_nopin_response(cmd, conn); 3631e48354ceSNicholas Bellinger break; 3632e48354ceSNicholas Bellinger case ISTATE_SEND_REJECT: 3633e48354ceSNicholas Bellinger ret = iscsit_send_reject(cmd, conn); 3634e48354ceSNicholas Bellinger break; 3635e48354ceSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 3636e48354ceSNicholas Bellinger ret = iscsit_send_task_mgt_rsp(cmd, conn); 3637e48354ceSNicholas Bellinger if (ret != 0) 3638e48354ceSNicholas Bellinger break; 3639e48354ceSNicholas Bellinger ret = iscsit_tmr_post_handler(cmd, conn); 3640e48354ceSNicholas Bellinger if (ret != 0) 3641e48354ceSNicholas Bellinger iscsit_fall_back_to_erl0(conn->sess); 3642e48354ceSNicholas Bellinger break; 3643e48354ceSNicholas Bellinger case ISTATE_SEND_TEXTRSP: 3644e48354ceSNicholas Bellinger ret = iscsit_send_text_rsp(cmd, conn); 3645e48354ceSNicholas Bellinger break; 3646e48354ceSNicholas Bellinger default: 3647e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3648e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3649e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, 3650e48354ceSNicholas Bellinger state, conn->cid); 36516f3c0e69SAndy Grover goto err; 3652e48354ceSNicholas Bellinger } 3653c6037cc5SAndy Grover if (ret < 0) 36546f3c0e69SAndy Grover goto err; 3655e48354ceSNicholas Bellinger 36566f3c0e69SAndy Grover if (iscsit_send_tx_data(cmd, conn, 1) < 0) { 3657e48354ceSNicholas Bellinger iscsit_tx_thread_wait_for_tcp(conn); 3658e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 36596f3c0e69SAndy Grover goto err; 3660e48354ceSNicholas Bellinger } 3661e48354ceSNicholas Bellinger iscsit_unmap_iovec(cmd); 3662e48354ceSNicholas Bellinger 3663e48354ceSNicholas Bellinger switch (state) { 36646f3c0e69SAndy Grover case ISTATE_SEND_LOGOUTRSP: 36656f3c0e69SAndy Grover if (!iscsit_logout_post_handler(cmd, conn)) 36666f3c0e69SAndy Grover goto restart; 36676f3c0e69SAndy Grover /* fall through */ 3668e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS: 3669e48354ceSNicholas Bellinger case ISTATE_SEND_ASYNCMSG: 3670e48354ceSNicholas Bellinger case ISTATE_SEND_NOPIN: 3671e48354ceSNicholas Bellinger case ISTATE_SEND_STATUS_RECOVERY: 3672e48354ceSNicholas Bellinger case ISTATE_SEND_TEXTRSP: 36736f3c0e69SAndy Grover case ISTATE_SEND_TASKMGTRSP: 36746f3c0e69SAndy Grover spin_lock_bh(&cmd->istate_lock); 36756f3c0e69SAndy Grover cmd->i_state = ISTATE_SENT_STATUS; 36766f3c0e69SAndy Grover spin_unlock_bh(&cmd->istate_lock); 3677e48354ceSNicholas Bellinger break; 3678e48354ceSNicholas Bellinger case ISTATE_SEND_REJECT: 3679e48354ceSNicholas Bellinger if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { 3680e48354ceSNicholas Bellinger cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; 3681e48354ceSNicholas Bellinger complete(&cmd->reject_comp); 36826f3c0e69SAndy Grover goto err; 3683e48354ceSNicholas Bellinger } 3684e48354ceSNicholas Bellinger complete(&cmd->reject_comp); 3685e48354ceSNicholas Bellinger break; 3686e48354ceSNicholas Bellinger default: 3687e48354ceSNicholas Bellinger pr_err("Unknown Opcode: 0x%02x ITT:" 3688e48354ceSNicholas Bellinger " 0x%08x, i_state: %d on CID: %hu\n", 3689e48354ceSNicholas Bellinger cmd->iscsi_opcode, cmd->init_task_tag, 3690e48354ceSNicholas Bellinger cmd->i_state, conn->cid); 36916f3c0e69SAndy Grover goto err; 3692e48354ceSNicholas Bellinger } 3693e48354ceSNicholas Bellinger 3694e48354ceSNicholas Bellinger if (atomic_read(&conn->check_immediate_queue)) 3695fd3a9025SNicholas Bellinger return 1; 3696c6037cc5SAndy Grover } 36976f3c0e69SAndy Grover 36986f3c0e69SAndy Grover return 0; 36996f3c0e69SAndy Grover 37006f3c0e69SAndy Grover err: 37016f3c0e69SAndy Grover return -1; 37026f3c0e69SAndy Grover restart: 37036f3c0e69SAndy Grover return -EAGAIN; 37046f3c0e69SAndy Grover } 37056f3c0e69SAndy Grover 37066f3c0e69SAndy Grover int iscsi_target_tx_thread(void *arg) 37076f3c0e69SAndy Grover { 37086f3c0e69SAndy Grover int ret = 0; 37096f3c0e69SAndy Grover struct iscsi_conn *conn; 37106f3c0e69SAndy Grover struct iscsi_thread_set *ts = arg; 37116f3c0e69SAndy Grover /* 37126f3c0e69SAndy Grover * Allow ourselves to be interrupted by SIGINT so that a 37136f3c0e69SAndy Grover * connection recovery / failure event can be triggered externally. 37146f3c0e69SAndy Grover */ 37156f3c0e69SAndy Grover allow_signal(SIGINT); 37166f3c0e69SAndy Grover 37176f3c0e69SAndy Grover restart: 37186f3c0e69SAndy Grover conn = iscsi_tx_thread_pre_handler(ts); 37196f3c0e69SAndy Grover if (!conn) 37206f3c0e69SAndy Grover goto out; 37216f3c0e69SAndy Grover 37226f3c0e69SAndy Grover ret = 0; 37236f3c0e69SAndy Grover 37246f3c0e69SAndy Grover while (!kthread_should_stop()) { 37256f3c0e69SAndy Grover /* 37266f3c0e69SAndy Grover * Ensure that both TX and RX per connection kthreads 37276f3c0e69SAndy Grover * are scheduled to run on the same CPU. 37286f3c0e69SAndy Grover */ 37296f3c0e69SAndy Grover iscsit_thread_check_cpumask(conn, current, 1); 37306f3c0e69SAndy Grover 3731d5627acbSRoland Dreier wait_event_interruptible(conn->queues_wq, 3732d5627acbSRoland Dreier !iscsit_conn_all_queues_empty(conn) || 3733d5627acbSRoland Dreier ts->status == ISCSI_THREAD_SET_RESET); 37346f3c0e69SAndy Grover 37356f3c0e69SAndy Grover if ((ts->status == ISCSI_THREAD_SET_RESET) || 37366f3c0e69SAndy Grover signal_pending(current)) 37376f3c0e69SAndy Grover goto transport_err; 37386f3c0e69SAndy Grover 3739fd3a9025SNicholas Bellinger get_immediate: 37406f3c0e69SAndy Grover ret = handle_immediate_queue(conn); 37416f3c0e69SAndy Grover if (ret < 0) 37426f3c0e69SAndy Grover goto transport_err; 37436f3c0e69SAndy Grover 37446f3c0e69SAndy Grover ret = handle_response_queue(conn); 3745fd3a9025SNicholas Bellinger if (ret == 1) 3746fd3a9025SNicholas Bellinger goto get_immediate; 3747fd3a9025SNicholas Bellinger else if (ret == -EAGAIN) 37486f3c0e69SAndy Grover goto restart; 37496f3c0e69SAndy Grover else if (ret < 0) 37506f3c0e69SAndy Grover goto transport_err; 3751e48354ceSNicholas Bellinger } 3752e48354ceSNicholas Bellinger 3753e48354ceSNicholas Bellinger transport_err: 3754e48354ceSNicholas Bellinger iscsit_take_action_for_connection_exit(conn); 3755e48354ceSNicholas Bellinger goto restart; 3756e48354ceSNicholas Bellinger out: 3757e48354ceSNicholas Bellinger return 0; 3758e48354ceSNicholas Bellinger } 3759e48354ceSNicholas Bellinger 3760e48354ceSNicholas Bellinger int iscsi_target_rx_thread(void *arg) 3761e48354ceSNicholas Bellinger { 3762e48354ceSNicholas Bellinger int ret; 3763e48354ceSNicholas Bellinger u8 buffer[ISCSI_HDR_LEN], opcode; 3764e48354ceSNicholas Bellinger u32 checksum = 0, digest = 0; 3765e48354ceSNicholas Bellinger struct iscsi_conn *conn = NULL; 37668359cf43SJörn Engel struct iscsi_thread_set *ts = arg; 3767e48354ceSNicholas Bellinger struct kvec iov; 3768e48354ceSNicholas Bellinger /* 3769e48354ceSNicholas Bellinger * Allow ourselves to be interrupted by SIGINT so that a 3770e48354ceSNicholas Bellinger * connection recovery / failure event can be triggered externally. 3771e48354ceSNicholas Bellinger */ 3772e48354ceSNicholas Bellinger allow_signal(SIGINT); 3773e48354ceSNicholas Bellinger 3774e48354ceSNicholas Bellinger restart: 3775e48354ceSNicholas Bellinger conn = iscsi_rx_thread_pre_handler(ts); 3776e48354ceSNicholas Bellinger if (!conn) 3777e48354ceSNicholas Bellinger goto out; 3778e48354ceSNicholas Bellinger 3779e48354ceSNicholas Bellinger while (!kthread_should_stop()) { 3780e48354ceSNicholas Bellinger /* 3781e48354ceSNicholas Bellinger * Ensure that both TX and RX per connection kthreads 3782e48354ceSNicholas Bellinger * are scheduled to run on the same CPU. 3783e48354ceSNicholas Bellinger */ 3784e48354ceSNicholas Bellinger iscsit_thread_check_cpumask(conn, current, 0); 3785e48354ceSNicholas Bellinger 3786e48354ceSNicholas Bellinger memset(buffer, 0, ISCSI_HDR_LEN); 3787e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 3788e48354ceSNicholas Bellinger 3789e48354ceSNicholas Bellinger iov.iov_base = buffer; 3790e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 3791e48354ceSNicholas Bellinger 3792e48354ceSNicholas Bellinger ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); 3793e48354ceSNicholas Bellinger if (ret != ISCSI_HDR_LEN) { 3794e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 3795e48354ceSNicholas Bellinger goto transport_err; 3796e48354ceSNicholas Bellinger } 3797e48354ceSNicholas Bellinger 3798e48354ceSNicholas Bellinger /* 3799e48354ceSNicholas Bellinger * Set conn->bad_hdr for use with REJECT PDUs. 3800e48354ceSNicholas Bellinger */ 3801e48354ceSNicholas Bellinger memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); 3802e48354ceSNicholas Bellinger 3803e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) { 3804e48354ceSNicholas Bellinger iov.iov_base = &digest; 3805e48354ceSNicholas Bellinger iov.iov_len = ISCSI_CRC_LEN; 3806e48354ceSNicholas Bellinger 3807e48354ceSNicholas Bellinger ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); 3808e48354ceSNicholas Bellinger if (ret != ISCSI_CRC_LEN) { 3809e48354ceSNicholas Bellinger iscsit_rx_thread_wait_for_tcp(conn); 3810e48354ceSNicholas Bellinger goto transport_err; 3811e48354ceSNicholas Bellinger } 3812e48354ceSNicholas Bellinger 3813e48354ceSNicholas Bellinger iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, 3814e48354ceSNicholas Bellinger buffer, ISCSI_HDR_LEN, 3815e48354ceSNicholas Bellinger 0, NULL, (u8 *)&checksum); 3816e48354ceSNicholas Bellinger 3817e48354ceSNicholas Bellinger if (digest != checksum) { 3818e48354ceSNicholas Bellinger pr_err("HeaderDigest CRC32C failed," 3819e48354ceSNicholas Bellinger " received 0x%08x, computed 0x%08x\n", 3820e48354ceSNicholas Bellinger digest, checksum); 3821e48354ceSNicholas Bellinger /* 3822e48354ceSNicholas Bellinger * Set the PDU to 0xff so it will intentionally 3823e48354ceSNicholas Bellinger * hit default in the switch below. 3824e48354ceSNicholas Bellinger */ 3825e48354ceSNicholas Bellinger memset(buffer, 0xff, ISCSI_HDR_LEN); 3826e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->session_stats_lock); 3827e48354ceSNicholas Bellinger conn->sess->conn_digest_errors++; 3828e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->session_stats_lock); 3829e48354ceSNicholas Bellinger } else { 3830e48354ceSNicholas Bellinger pr_debug("Got HeaderDigest CRC32C" 3831e48354ceSNicholas Bellinger " 0x%08x\n", checksum); 3832e48354ceSNicholas Bellinger } 3833e48354ceSNicholas Bellinger } 3834e48354ceSNicholas Bellinger 3835e48354ceSNicholas Bellinger if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) 3836e48354ceSNicholas Bellinger goto transport_err; 3837e48354ceSNicholas Bellinger 3838e48354ceSNicholas Bellinger opcode = buffer[0] & ISCSI_OPCODE_MASK; 3839e48354ceSNicholas Bellinger 3840e48354ceSNicholas Bellinger if (conn->sess->sess_ops->SessionType && 3841e48354ceSNicholas Bellinger ((!(opcode & ISCSI_OP_TEXT)) || 3842e48354ceSNicholas Bellinger (!(opcode & ISCSI_OP_LOGOUT)))) { 3843e48354ceSNicholas Bellinger pr_err("Received illegal iSCSI Opcode: 0x%02x" 3844e48354ceSNicholas Bellinger " while in Discovery Session, rejecting.\n", opcode); 3845e48354ceSNicholas Bellinger iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, 3846e48354ceSNicholas Bellinger buffer, conn); 3847e48354ceSNicholas Bellinger goto transport_err; 3848e48354ceSNicholas Bellinger } 3849e48354ceSNicholas Bellinger 3850e48354ceSNicholas Bellinger switch (opcode) { 3851e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 3852e48354ceSNicholas Bellinger if (iscsit_handle_scsi_cmd(conn, buffer) < 0) 3853e48354ceSNicholas Bellinger goto transport_err; 3854e48354ceSNicholas Bellinger break; 3855e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_DATA_OUT: 3856e48354ceSNicholas Bellinger if (iscsit_handle_data_out(conn, buffer) < 0) 3857e48354ceSNicholas Bellinger goto transport_err; 3858e48354ceSNicholas Bellinger break; 3859e48354ceSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 3860e48354ceSNicholas Bellinger if (iscsit_handle_nop_out(conn, buffer) < 0) 3861e48354ceSNicholas Bellinger goto transport_err; 3862e48354ceSNicholas Bellinger break; 3863e48354ceSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 3864e48354ceSNicholas Bellinger if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0) 3865e48354ceSNicholas Bellinger goto transport_err; 3866e48354ceSNicholas Bellinger break; 3867e48354ceSNicholas Bellinger case ISCSI_OP_TEXT: 3868e48354ceSNicholas Bellinger if (iscsit_handle_text_cmd(conn, buffer) < 0) 3869e48354ceSNicholas Bellinger goto transport_err; 3870e48354ceSNicholas Bellinger break; 3871e48354ceSNicholas Bellinger case ISCSI_OP_LOGOUT: 3872e48354ceSNicholas Bellinger ret = iscsit_handle_logout_cmd(conn, buffer); 3873e48354ceSNicholas Bellinger if (ret > 0) { 3874e48354ceSNicholas Bellinger wait_for_completion_timeout(&conn->conn_logout_comp, 3875e48354ceSNicholas Bellinger SECONDS_FOR_LOGOUT_COMP * HZ); 3876e48354ceSNicholas Bellinger goto transport_err; 3877e48354ceSNicholas Bellinger } else if (ret < 0) 3878e48354ceSNicholas Bellinger goto transport_err; 3879e48354ceSNicholas Bellinger break; 3880e48354ceSNicholas Bellinger case ISCSI_OP_SNACK: 3881e48354ceSNicholas Bellinger if (iscsit_handle_snack(conn, buffer) < 0) 3882e48354ceSNicholas Bellinger goto transport_err; 3883e48354ceSNicholas Bellinger break; 3884e48354ceSNicholas Bellinger default: 3885e48354ceSNicholas Bellinger pr_err("Got unknown iSCSI OpCode: 0x%02x\n", 3886e48354ceSNicholas Bellinger opcode); 3887e48354ceSNicholas Bellinger if (!conn->sess->sess_ops->ErrorRecoveryLevel) { 3888e48354ceSNicholas Bellinger pr_err("Cannot recover from unknown" 3889e48354ceSNicholas Bellinger " opcode while ERL=0, closing iSCSI connection" 3890e48354ceSNicholas Bellinger ".\n"); 3891e48354ceSNicholas Bellinger goto transport_err; 3892e48354ceSNicholas Bellinger } 3893e48354ceSNicholas Bellinger if (!conn->conn_ops->OFMarker) { 3894e48354ceSNicholas Bellinger pr_err("Unable to recover from unknown" 3895e48354ceSNicholas Bellinger " opcode while OFMarker=No, closing iSCSI" 3896e48354ceSNicholas Bellinger " connection.\n"); 3897e48354ceSNicholas Bellinger goto transport_err; 3898e48354ceSNicholas Bellinger } 3899e48354ceSNicholas Bellinger if (iscsit_recover_from_unknown_opcode(conn) < 0) { 3900e48354ceSNicholas Bellinger pr_err("Unable to recover from unknown" 3901e48354ceSNicholas Bellinger " opcode, closing iSCSI connection.\n"); 3902e48354ceSNicholas Bellinger goto transport_err; 3903e48354ceSNicholas Bellinger } 3904e48354ceSNicholas Bellinger break; 3905e48354ceSNicholas Bellinger } 3906e48354ceSNicholas Bellinger } 3907e48354ceSNicholas Bellinger 3908e48354ceSNicholas Bellinger transport_err: 3909e48354ceSNicholas Bellinger if (!signal_pending(current)) 3910e48354ceSNicholas Bellinger atomic_set(&conn->transport_failed, 1); 3911e48354ceSNicholas Bellinger iscsit_take_action_for_connection_exit(conn); 3912e48354ceSNicholas Bellinger goto restart; 3913e48354ceSNicholas Bellinger out: 3914e48354ceSNicholas Bellinger return 0; 3915e48354ceSNicholas Bellinger } 3916e48354ceSNicholas Bellinger 3917e48354ceSNicholas Bellinger static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) 3918e48354ceSNicholas Bellinger { 3919e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; 3920e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 3921e48354ceSNicholas Bellinger /* 3922e48354ceSNicholas Bellinger * We expect this function to only ever be called from either RX or TX 3923e48354ceSNicholas Bellinger * thread context via iscsit_close_connection() once the other context 3924e48354ceSNicholas Bellinger * has been reset -> returned sleeping pre-handler state. 3925e48354ceSNicholas Bellinger */ 3926e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 39272fbb471eSAndy Grover list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { 3928e48354ceSNicholas Bellinger 39292fbb471eSAndy Grover list_del(&cmd->i_conn_node); 3930e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3931e48354ceSNicholas Bellinger 3932e48354ceSNicholas Bellinger iscsit_increment_maxcmdsn(cmd, sess); 3933e48354ceSNicholas Bellinger 3934d270190aSNicholas Bellinger iscsit_free_cmd(cmd); 3935e48354ceSNicholas Bellinger 3936e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3937e48354ceSNicholas Bellinger } 3938e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3939e48354ceSNicholas Bellinger } 3940e48354ceSNicholas Bellinger 3941e48354ceSNicholas Bellinger static void iscsit_stop_timers_for_cmds( 3942e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3943e48354ceSNicholas Bellinger { 3944e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 3945e48354ceSNicholas Bellinger 3946e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 39472fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 3948e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 3949e48354ceSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 3950e48354ceSNicholas Bellinger } 3951e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 3952e48354ceSNicholas Bellinger } 3953e48354ceSNicholas Bellinger 3954e48354ceSNicholas Bellinger int iscsit_close_connection( 3955e48354ceSNicholas Bellinger struct iscsi_conn *conn) 3956e48354ceSNicholas Bellinger { 3957e48354ceSNicholas Bellinger int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); 3958e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 3959e48354ceSNicholas Bellinger 3960e48354ceSNicholas Bellinger pr_debug("Closing iSCSI connection CID %hu on SID:" 3961e48354ceSNicholas Bellinger " %u\n", conn->cid, sess->sid); 3962e48354ceSNicholas Bellinger /* 3963e48354ceSNicholas Bellinger * Always up conn_logout_comp just in case the RX Thread is sleeping 3964e48354ceSNicholas Bellinger * and the logout response never got sent because the connection 3965e48354ceSNicholas Bellinger * failed. 3966e48354ceSNicholas Bellinger */ 3967e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 3968e48354ceSNicholas Bellinger 3969e48354ceSNicholas Bellinger iscsi_release_thread_set(conn); 3970e48354ceSNicholas Bellinger 3971e48354ceSNicholas Bellinger iscsit_stop_timers_for_cmds(conn); 3972e48354ceSNicholas Bellinger iscsit_stop_nopin_response_timer(conn); 3973e48354ceSNicholas Bellinger iscsit_stop_nopin_timer(conn); 3974e48354ceSNicholas Bellinger iscsit_free_queue_reqs_for_conn(conn); 3975e48354ceSNicholas Bellinger 3976e48354ceSNicholas Bellinger /* 3977e48354ceSNicholas Bellinger * During Connection recovery drop unacknowledged out of order 3978e48354ceSNicholas Bellinger * commands for this connection, and prepare the other commands 3979e48354ceSNicholas Bellinger * for realligence. 3980e48354ceSNicholas Bellinger * 3981e48354ceSNicholas Bellinger * During normal operation clear the out of order commands (but 3982e48354ceSNicholas Bellinger * do not free the struct iscsi_ooo_cmdsn's) and release all 3983e48354ceSNicholas Bellinger * struct iscsi_cmds. 3984e48354ceSNicholas Bellinger */ 3985e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_recovery)) { 3986e48354ceSNicholas Bellinger iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); 3987e48354ceSNicholas Bellinger iscsit_prepare_cmds_for_realligance(conn); 3988e48354ceSNicholas Bellinger } else { 3989e48354ceSNicholas Bellinger iscsit_clear_ooo_cmdsns_for_conn(conn); 3990e48354ceSNicholas Bellinger iscsit_release_commands_from_conn(conn); 3991e48354ceSNicholas Bellinger } 3992e48354ceSNicholas Bellinger 3993e48354ceSNicholas Bellinger /* 3994e48354ceSNicholas Bellinger * Handle decrementing session or connection usage count if 3995e48354ceSNicholas Bellinger * a logout response was not able to be sent because the 3996e48354ceSNicholas Bellinger * connection failed. Fall back to Session Recovery here. 3997e48354ceSNicholas Bellinger */ 3998e48354ceSNicholas Bellinger if (atomic_read(&conn->conn_logout_remove)) { 3999e48354ceSNicholas Bellinger if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { 4000e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4001e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 4002e48354ceSNicholas Bellinger } 4003e48354ceSNicholas Bellinger if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) 4004e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4005e48354ceSNicholas Bellinger 4006e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4007e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 0); 4008e48354ceSNicholas Bellinger atomic_set(&sess->session_fall_back_to_erl0, 1); 4009e48354ceSNicholas Bellinger } 4010e48354ceSNicholas Bellinger 4011e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4012e48354ceSNicholas Bellinger list_del(&conn->conn_list); 4013e48354ceSNicholas Bellinger 4014e48354ceSNicholas Bellinger /* 4015e48354ceSNicholas Bellinger * Attempt to let the Initiator know this connection failed by 4016e48354ceSNicholas Bellinger * sending an Connection Dropped Async Message on another 4017e48354ceSNicholas Bellinger * active connection. 4018e48354ceSNicholas Bellinger */ 4019e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_recovery)) 4020e48354ceSNicholas Bellinger iscsit_build_conn_drop_async_message(conn); 4021e48354ceSNicholas Bellinger 4022e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4023e48354ceSNicholas Bellinger 4024e48354ceSNicholas Bellinger /* 4025e48354ceSNicholas Bellinger * If connection reinstatement is being performed on this connection, 4026e48354ceSNicholas Bellinger * up the connection reinstatement semaphore that is being blocked on 4027e48354ceSNicholas Bellinger * in iscsit_cause_connection_reinstatement(). 4028e48354ceSNicholas Bellinger */ 4029e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4030e48354ceSNicholas Bellinger if (atomic_read(&conn->sleep_on_conn_wait_comp)) { 4031e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4032e48354ceSNicholas Bellinger complete(&conn->conn_wait_comp); 4033e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_post_wait_comp); 4034e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4035e48354ceSNicholas Bellinger } 4036e48354ceSNicholas Bellinger 4037e48354ceSNicholas Bellinger /* 4038e48354ceSNicholas Bellinger * If connection reinstatement is being performed on this connection 4039e48354ceSNicholas Bellinger * by receiving a REMOVECONNFORRECOVERY logout request, up the 4040e48354ceSNicholas Bellinger * connection wait rcfr semaphore that is being blocked on 4041e48354ceSNicholas Bellinger * an iscsit_connection_reinstatement_rcfr(). 4042e48354ceSNicholas Bellinger */ 4043e48354ceSNicholas Bellinger if (atomic_read(&conn->connection_wait_rcfr)) { 4044e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4045e48354ceSNicholas Bellinger complete(&conn->conn_wait_rcfr_comp); 4046e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_post_wait_comp); 4047e48354ceSNicholas Bellinger spin_lock_bh(&conn->state_lock); 4048e48354ceSNicholas Bellinger } 4049e48354ceSNicholas Bellinger atomic_set(&conn->connection_reinstatement, 1); 4050e48354ceSNicholas Bellinger spin_unlock_bh(&conn->state_lock); 4051e48354ceSNicholas Bellinger 4052e48354ceSNicholas Bellinger /* 4053e48354ceSNicholas Bellinger * If any other processes are accessing this connection pointer we 4054e48354ceSNicholas Bellinger * must wait until they have completed. 4055e48354ceSNicholas Bellinger */ 4056e48354ceSNicholas Bellinger iscsit_check_conn_usage_count(conn); 4057e48354ceSNicholas Bellinger 4058e48354ceSNicholas Bellinger if (conn->conn_rx_hash.tfm) 4059e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_rx_hash.tfm); 4060e48354ceSNicholas Bellinger if (conn->conn_tx_hash.tfm) 4061e48354ceSNicholas Bellinger crypto_free_hash(conn->conn_tx_hash.tfm); 4062e48354ceSNicholas Bellinger 4063e48354ceSNicholas Bellinger if (conn->conn_cpumask) 4064e48354ceSNicholas Bellinger free_cpumask_var(conn->conn_cpumask); 4065e48354ceSNicholas Bellinger 4066e48354ceSNicholas Bellinger kfree(conn->conn_ops); 4067e48354ceSNicholas Bellinger conn->conn_ops = NULL; 4068e48354ceSNicholas Bellinger 4069bf6932f4SAl Viro if (conn->sock) 4070e48354ceSNicholas Bellinger sock_release(conn->sock); 4071baa4d64bSNicholas Bellinger 4072baa4d64bSNicholas Bellinger if (conn->conn_transport->iscsit_free_conn) 4073baa4d64bSNicholas Bellinger conn->conn_transport->iscsit_free_conn(conn); 4074baa4d64bSNicholas Bellinger 4075baa4d64bSNicholas Bellinger iscsit_put_transport(conn->conn_transport); 4076baa4d64bSNicholas Bellinger 4077e48354ceSNicholas Bellinger conn->thread_set = NULL; 4078e48354ceSNicholas Bellinger 4079e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); 4080e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_FREE; 4081e48354ceSNicholas Bellinger kfree(conn); 4082e48354ceSNicholas Bellinger 4083e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4084e48354ceSNicholas Bellinger atomic_dec(&sess->nconn); 4085e48354ceSNicholas Bellinger pr_debug("Decremented iSCSI connection count to %hu from node:" 4086e48354ceSNicholas Bellinger " %s\n", atomic_read(&sess->nconn), 4087e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4088e48354ceSNicholas Bellinger /* 4089e48354ceSNicholas Bellinger * Make sure that if one connection fails in an non ERL=2 iSCSI 4090e48354ceSNicholas Bellinger * Session that they all fail. 4091e48354ceSNicholas Bellinger */ 4092e48354ceSNicholas Bellinger if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && 4093e48354ceSNicholas Bellinger !atomic_read(&sess->session_logout)) 4094e48354ceSNicholas Bellinger atomic_set(&sess->session_fall_back_to_erl0, 1); 4095e48354ceSNicholas Bellinger 4096e48354ceSNicholas Bellinger /* 4097e48354ceSNicholas Bellinger * If this was not the last connection in the session, and we are 4098e48354ceSNicholas Bellinger * performing session reinstatement or falling back to ERL=0, call 4099e48354ceSNicholas Bellinger * iscsit_stop_session() without sleeping to shutdown the other 4100e48354ceSNicholas Bellinger * active connections. 4101e48354ceSNicholas Bellinger */ 4102e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4103e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_reinstatement) && 4104e48354ceSNicholas Bellinger !atomic_read(&sess->session_fall_back_to_erl0)) { 4105e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4106e48354ceSNicholas Bellinger return 0; 4107e48354ceSNicholas Bellinger } 4108e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_stop_active)) { 4109e48354ceSNicholas Bellinger atomic_set(&sess->session_stop_active, 1); 4110e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4111e48354ceSNicholas Bellinger iscsit_stop_session(sess, 0, 0); 4112e48354ceSNicholas Bellinger return 0; 4113e48354ceSNicholas Bellinger } 4114e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4115e48354ceSNicholas Bellinger return 0; 4116e48354ceSNicholas Bellinger } 4117e48354ceSNicholas Bellinger 4118e48354ceSNicholas Bellinger /* 4119e48354ceSNicholas Bellinger * If this was the last connection in the session and one of the 4120e48354ceSNicholas Bellinger * following is occurring: 4121e48354ceSNicholas Bellinger * 4122e48354ceSNicholas Bellinger * Session Reinstatement is not being performed, and are falling back 4123e48354ceSNicholas Bellinger * to ERL=0 call iscsit_close_session(). 4124e48354ceSNicholas Bellinger * 4125e48354ceSNicholas Bellinger * Session Logout was requested. iscsit_close_session() will be called 4126e48354ceSNicholas Bellinger * elsewhere. 4127e48354ceSNicholas Bellinger * 4128e48354ceSNicholas Bellinger * Session Continuation is not being performed, start the Time2Retain 4129e48354ceSNicholas Bellinger * handler and check if sleep_on_sess_wait_sem is active. 4130e48354ceSNicholas Bellinger */ 4131e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_reinstatement) && 4132e48354ceSNicholas Bellinger atomic_read(&sess->session_fall_back_to_erl0)) { 4133e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 413499367f01SNicholas Bellinger target_put_session(sess->se_sess); 4135e48354ceSNicholas Bellinger 4136e48354ceSNicholas Bellinger return 0; 4137e48354ceSNicholas Bellinger } else if (atomic_read(&sess->session_logout)) { 4138e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); 4139e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FREE; 4140e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4141e48354ceSNicholas Bellinger 4142e48354ceSNicholas Bellinger if (atomic_read(&sess->sleep_on_sess_wait_comp)) 4143e48354ceSNicholas Bellinger complete(&sess->session_wait_comp); 4144e48354ceSNicholas Bellinger 4145e48354ceSNicholas Bellinger return 0; 4146e48354ceSNicholas Bellinger } else { 4147e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); 4148e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FAILED; 4149e48354ceSNicholas Bellinger 4150e48354ceSNicholas Bellinger if (!atomic_read(&sess->session_continuation)) { 4151e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4152e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(sess); 4153e48354ceSNicholas Bellinger } else 4154e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4155e48354ceSNicholas Bellinger 4156e48354ceSNicholas Bellinger if (atomic_read(&sess->sleep_on_sess_wait_comp)) 4157e48354ceSNicholas Bellinger complete(&sess->session_wait_comp); 4158e48354ceSNicholas Bellinger 4159e48354ceSNicholas Bellinger return 0; 4160e48354ceSNicholas Bellinger } 4161e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4162e48354ceSNicholas Bellinger 4163e48354ceSNicholas Bellinger return 0; 4164e48354ceSNicholas Bellinger } 4165e48354ceSNicholas Bellinger 4166e48354ceSNicholas Bellinger int iscsit_close_session(struct iscsi_session *sess) 4167e48354ceSNicholas Bellinger { 4168e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); 4169e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 4170e48354ceSNicholas Bellinger 4171e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4172e48354ceSNicholas Bellinger pr_err("%d connection(s) still exist for iSCSI session" 4173e48354ceSNicholas Bellinger " to %s\n", atomic_read(&sess->nconn), 4174e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4175e48354ceSNicholas Bellinger BUG(); 4176e48354ceSNicholas Bellinger } 4177e48354ceSNicholas Bellinger 4178e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4179e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 1); 4180e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 1); 4181e48354ceSNicholas Bellinger iscsit_stop_time2retain_timer(sess); 4182e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4183e48354ceSNicholas Bellinger 4184e48354ceSNicholas Bellinger /* 4185e48354ceSNicholas Bellinger * transport_deregister_session_configfs() will clear the 4186e48354ceSNicholas Bellinger * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context 4187e48354ceSNicholas Bellinger * can be setting it again with __transport_register_session() in 4188e48354ceSNicholas Bellinger * iscsi_post_login_handler() again after the iscsit_stop_session() 4189e48354ceSNicholas Bellinger * completes in iscsi_np context. 4190e48354ceSNicholas Bellinger */ 4191e48354ceSNicholas Bellinger transport_deregister_session_configfs(sess->se_sess); 4192e48354ceSNicholas Bellinger 4193e48354ceSNicholas Bellinger /* 4194e48354ceSNicholas Bellinger * If any other processes are accessing this session pointer we must 4195e48354ceSNicholas Bellinger * wait until they have completed. If we are in an interrupt (the 4196e48354ceSNicholas Bellinger * time2retain handler) and contain and active session usage count we 4197e48354ceSNicholas Bellinger * restart the timer and exit. 4198e48354ceSNicholas Bellinger */ 4199e48354ceSNicholas Bellinger if (!in_interrupt()) { 4200e48354ceSNicholas Bellinger if (iscsit_check_session_usage_count(sess) == 1) 4201e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 4202e48354ceSNicholas Bellinger } else { 4203e48354ceSNicholas Bellinger if (iscsit_check_session_usage_count(sess) == 2) { 4204e48354ceSNicholas Bellinger atomic_set(&sess->session_logout, 0); 4205e48354ceSNicholas Bellinger iscsit_start_time2retain_handler(sess); 4206e48354ceSNicholas Bellinger return 0; 4207e48354ceSNicholas Bellinger } 4208e48354ceSNicholas Bellinger } 4209e48354ceSNicholas Bellinger 4210e48354ceSNicholas Bellinger transport_deregister_session(sess->se_sess); 4211e48354ceSNicholas Bellinger 4212e48354ceSNicholas Bellinger if (sess->sess_ops->ErrorRecoveryLevel == 2) 4213e48354ceSNicholas Bellinger iscsit_free_connection_recovery_entires(sess); 4214e48354ceSNicholas Bellinger 4215e48354ceSNicholas Bellinger iscsit_free_all_ooo_cmdsns(sess); 4216e48354ceSNicholas Bellinger 4217e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4218e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); 4219e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FREE; 4220e48354ceSNicholas Bellinger pr_debug("Released iSCSI session from node: %s\n", 4221e48354ceSNicholas Bellinger sess->sess_ops->InitiatorName); 4222e48354ceSNicholas Bellinger tpg->nsessions--; 4223e48354ceSNicholas Bellinger if (tpg->tpg_tiqn) 4224e48354ceSNicholas Bellinger tpg->tpg_tiqn->tiqn_nsessions--; 4225e48354ceSNicholas Bellinger 4226e48354ceSNicholas Bellinger pr_debug("Decremented number of active iSCSI Sessions on" 4227e48354ceSNicholas Bellinger " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); 4228e48354ceSNicholas Bellinger 4229e48354ceSNicholas Bellinger spin_lock(&sess_idr_lock); 4230e48354ceSNicholas Bellinger idr_remove(&sess_idr, sess->session_index); 4231e48354ceSNicholas Bellinger spin_unlock(&sess_idr_lock); 4232e48354ceSNicholas Bellinger 4233e48354ceSNicholas Bellinger kfree(sess->sess_ops); 4234e48354ceSNicholas Bellinger sess->sess_ops = NULL; 4235e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4236e48354ceSNicholas Bellinger 4237e48354ceSNicholas Bellinger kfree(sess); 4238e48354ceSNicholas Bellinger return 0; 4239e48354ceSNicholas Bellinger } 4240e48354ceSNicholas Bellinger 4241e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_closesession( 4242e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4243e48354ceSNicholas Bellinger { 4244e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 4245e48354ceSNicholas Bellinger 4246e48354ceSNicholas Bellinger iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); 4247e48354ceSNicholas Bellinger iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); 4248e48354ceSNicholas Bellinger 4249e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4250e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 4251e48354ceSNicholas Bellinger 4252e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4253e48354ceSNicholas Bellinger iscsit_stop_session(sess, 1, 1); 4254e48354ceSNicholas Bellinger iscsit_dec_session_usage_count(sess); 425599367f01SNicholas Bellinger target_put_session(sess->se_sess); 4256e48354ceSNicholas Bellinger } 4257e48354ceSNicholas Bellinger 4258e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_samecid( 4259e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4260e48354ceSNicholas Bellinger { 4261e48354ceSNicholas Bellinger iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); 4262e48354ceSNicholas Bellinger iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); 4263e48354ceSNicholas Bellinger 4264e48354ceSNicholas Bellinger atomic_set(&conn->conn_logout_remove, 0); 4265e48354ceSNicholas Bellinger complete(&conn->conn_logout_comp); 4266e48354ceSNicholas Bellinger 4267e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4268e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4269e48354ceSNicholas Bellinger } 4270e48354ceSNicholas Bellinger 4271e48354ceSNicholas Bellinger static void iscsit_logout_post_handler_diffcid( 4272e48354ceSNicholas Bellinger struct iscsi_conn *conn, 4273e48354ceSNicholas Bellinger u16 cid) 4274e48354ceSNicholas Bellinger { 4275e48354ceSNicholas Bellinger struct iscsi_conn *l_conn; 4276e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 4277e48354ceSNicholas Bellinger 4278e48354ceSNicholas Bellinger if (!sess) 4279e48354ceSNicholas Bellinger return; 4280e48354ceSNicholas Bellinger 4281e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4282e48354ceSNicholas Bellinger list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { 4283e48354ceSNicholas Bellinger if (l_conn->cid == cid) { 4284e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(l_conn); 4285e48354ceSNicholas Bellinger break; 4286e48354ceSNicholas Bellinger } 4287e48354ceSNicholas Bellinger } 4288e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4289e48354ceSNicholas Bellinger 4290e48354ceSNicholas Bellinger if (!l_conn) 4291e48354ceSNicholas Bellinger return; 4292e48354ceSNicholas Bellinger 4293e48354ceSNicholas Bellinger if (l_conn->sock) 4294e48354ceSNicholas Bellinger l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); 4295e48354ceSNicholas Bellinger 4296e48354ceSNicholas Bellinger spin_lock_bh(&l_conn->state_lock); 4297e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); 4298e48354ceSNicholas Bellinger l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; 4299e48354ceSNicholas Bellinger spin_unlock_bh(&l_conn->state_lock); 4300e48354ceSNicholas Bellinger 4301e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(l_conn, 1); 4302e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(l_conn); 4303e48354ceSNicholas Bellinger } 4304e48354ceSNicholas Bellinger 4305e48354ceSNicholas Bellinger /* 4306e48354ceSNicholas Bellinger * Return of 0 causes the TX thread to restart. 4307e48354ceSNicholas Bellinger */ 4308e48354ceSNicholas Bellinger static int iscsit_logout_post_handler( 4309e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 4310e48354ceSNicholas Bellinger struct iscsi_conn *conn) 4311e48354ceSNicholas Bellinger { 4312e48354ceSNicholas Bellinger int ret = 0; 4313e48354ceSNicholas Bellinger 4314e48354ceSNicholas Bellinger switch (cmd->logout_reason) { 4315e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_SESSION: 4316e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4317e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4318e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4319e48354ceSNicholas Bellinger default: 4320e48354ceSNicholas Bellinger iscsit_logout_post_handler_closesession(conn); 4321e48354ceSNicholas Bellinger break; 4322e48354ceSNicholas Bellinger } 4323e48354ceSNicholas Bellinger ret = 0; 4324e48354ceSNicholas Bellinger break; 4325e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: 4326e48354ceSNicholas Bellinger if (conn->cid == cmd->logout_cid) { 4327e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4328e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4329e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4330e48354ceSNicholas Bellinger default: 4331e48354ceSNicholas Bellinger iscsit_logout_post_handler_samecid(conn); 4332e48354ceSNicholas Bellinger break; 4333e48354ceSNicholas Bellinger } 4334e48354ceSNicholas Bellinger ret = 0; 4335e48354ceSNicholas Bellinger } else { 4336e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4337e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4338e48354ceSNicholas Bellinger iscsit_logout_post_handler_diffcid(conn, 4339e48354ceSNicholas Bellinger cmd->logout_cid); 4340e48354ceSNicholas Bellinger break; 4341e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CID_NOT_FOUND: 4342e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4343e48354ceSNicholas Bellinger default: 4344e48354ceSNicholas Bellinger break; 4345e48354ceSNicholas Bellinger } 4346e48354ceSNicholas Bellinger ret = 1; 4347e48354ceSNicholas Bellinger } 4348e48354ceSNicholas Bellinger break; 4349e48354ceSNicholas Bellinger case ISCSI_LOGOUT_REASON_RECOVERY: 4350e48354ceSNicholas Bellinger switch (cmd->logout_response) { 4351e48354ceSNicholas Bellinger case ISCSI_LOGOUT_SUCCESS: 4352e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CID_NOT_FOUND: 4353e48354ceSNicholas Bellinger case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: 4354e48354ceSNicholas Bellinger case ISCSI_LOGOUT_CLEANUP_FAILED: 4355e48354ceSNicholas Bellinger default: 4356e48354ceSNicholas Bellinger break; 4357e48354ceSNicholas Bellinger } 4358e48354ceSNicholas Bellinger ret = 1; 4359e48354ceSNicholas Bellinger break; 4360e48354ceSNicholas Bellinger default: 4361e48354ceSNicholas Bellinger break; 4362e48354ceSNicholas Bellinger 4363e48354ceSNicholas Bellinger } 4364e48354ceSNicholas Bellinger return ret; 4365e48354ceSNicholas Bellinger } 4366e48354ceSNicholas Bellinger 4367e48354ceSNicholas Bellinger void iscsit_fail_session(struct iscsi_session *sess) 4368e48354ceSNicholas Bellinger { 4369e48354ceSNicholas Bellinger struct iscsi_conn *conn; 4370e48354ceSNicholas Bellinger 4371e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4372e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 4373e48354ceSNicholas Bellinger pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); 4374e48354ceSNicholas Bellinger conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; 4375e48354ceSNicholas Bellinger } 4376e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4377e48354ceSNicholas Bellinger 4378e48354ceSNicholas Bellinger pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); 4379e48354ceSNicholas Bellinger sess->session_state = TARG_SESS_STATE_FAILED; 4380e48354ceSNicholas Bellinger } 4381e48354ceSNicholas Bellinger 4382e48354ceSNicholas Bellinger int iscsit_free_session(struct iscsi_session *sess) 4383e48354ceSNicholas Bellinger { 4384e48354ceSNicholas Bellinger u16 conn_count = atomic_read(&sess->nconn); 4385e48354ceSNicholas Bellinger struct iscsi_conn *conn, *conn_tmp = NULL; 4386e48354ceSNicholas Bellinger int is_last; 4387e48354ceSNicholas Bellinger 4388e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4389e48354ceSNicholas Bellinger atomic_set(&sess->sleep_on_sess_wait_comp, 1); 4390e48354ceSNicholas Bellinger 4391e48354ceSNicholas Bellinger list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, 4392e48354ceSNicholas Bellinger conn_list) { 4393e48354ceSNicholas Bellinger if (conn_count == 0) 4394e48354ceSNicholas Bellinger break; 4395e48354ceSNicholas Bellinger 4396e48354ceSNicholas Bellinger if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { 4397e48354ceSNicholas Bellinger is_last = 1; 4398e48354ceSNicholas Bellinger } else { 4399e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_tmp); 4400e48354ceSNicholas Bellinger is_last = 0; 4401e48354ceSNicholas Bellinger } 4402e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 4403e48354ceSNicholas Bellinger 4404e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4405e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4406e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4407e48354ceSNicholas Bellinger 4408e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4409e48354ceSNicholas Bellinger if (is_last == 0) 4410e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_tmp); 4411e48354ceSNicholas Bellinger 4412e48354ceSNicholas Bellinger conn_count--; 4413e48354ceSNicholas Bellinger } 4414e48354ceSNicholas Bellinger 4415e48354ceSNicholas Bellinger if (atomic_read(&sess->nconn)) { 4416e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4417e48354ceSNicholas Bellinger wait_for_completion(&sess->session_wait_comp); 4418e48354ceSNicholas Bellinger } else 4419e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4420e48354ceSNicholas Bellinger 442199367f01SNicholas Bellinger target_put_session(sess->se_sess); 4422e48354ceSNicholas Bellinger return 0; 4423e48354ceSNicholas Bellinger } 4424e48354ceSNicholas Bellinger 4425e48354ceSNicholas Bellinger void iscsit_stop_session( 4426e48354ceSNicholas Bellinger struct iscsi_session *sess, 4427e48354ceSNicholas Bellinger int session_sleep, 4428e48354ceSNicholas Bellinger int connection_sleep) 4429e48354ceSNicholas Bellinger { 4430e48354ceSNicholas Bellinger u16 conn_count = atomic_read(&sess->nconn); 4431e48354ceSNicholas Bellinger struct iscsi_conn *conn, *conn_tmp = NULL; 4432e48354ceSNicholas Bellinger int is_last; 4433e48354ceSNicholas Bellinger 4434e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4435e48354ceSNicholas Bellinger if (session_sleep) 4436e48354ceSNicholas Bellinger atomic_set(&sess->sleep_on_sess_wait_comp, 1); 4437e48354ceSNicholas Bellinger 4438e48354ceSNicholas Bellinger if (connection_sleep) { 4439e48354ceSNicholas Bellinger list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, 4440e48354ceSNicholas Bellinger conn_list) { 4441e48354ceSNicholas Bellinger if (conn_count == 0) 4442e48354ceSNicholas Bellinger break; 4443e48354ceSNicholas Bellinger 4444e48354ceSNicholas Bellinger if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { 4445e48354ceSNicholas Bellinger is_last = 1; 4446e48354ceSNicholas Bellinger } else { 4447e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn_tmp); 4448e48354ceSNicholas Bellinger is_last = 0; 4449e48354ceSNicholas Bellinger } 4450e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 4451e48354ceSNicholas Bellinger 4452e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4453e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 1); 4454e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 4455e48354ceSNicholas Bellinger 4456e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 4457e48354ceSNicholas Bellinger if (is_last == 0) 4458e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn_tmp); 4459e48354ceSNicholas Bellinger conn_count--; 4460e48354ceSNicholas Bellinger } 4461e48354ceSNicholas Bellinger } else { 4462e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 4463e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 4464e48354ceSNicholas Bellinger } 4465e48354ceSNicholas Bellinger 4466e48354ceSNicholas Bellinger if (session_sleep && atomic_read(&sess->nconn)) { 4467e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4468e48354ceSNicholas Bellinger wait_for_completion(&sess->session_wait_comp); 4469e48354ceSNicholas Bellinger } else 4470e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 4471e48354ceSNicholas Bellinger } 4472e48354ceSNicholas Bellinger 4473e48354ceSNicholas Bellinger int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) 4474e48354ceSNicholas Bellinger { 4475e48354ceSNicholas Bellinger struct iscsi_session *sess; 4476e48354ceSNicholas Bellinger struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; 4477e48354ceSNicholas Bellinger struct se_session *se_sess, *se_sess_tmp; 4478e48354ceSNicholas Bellinger int session_count = 0; 4479e48354ceSNicholas Bellinger 4480e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4481e48354ceSNicholas Bellinger if (tpg->nsessions && !force) { 4482e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4483e48354ceSNicholas Bellinger return -1; 4484e48354ceSNicholas Bellinger } 4485e48354ceSNicholas Bellinger 4486e48354ceSNicholas Bellinger list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, 4487e48354ceSNicholas Bellinger sess_list) { 4488e48354ceSNicholas Bellinger sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; 4489e48354ceSNicholas Bellinger 4490e48354ceSNicholas Bellinger spin_lock(&sess->conn_lock); 4491e48354ceSNicholas Bellinger if (atomic_read(&sess->session_fall_back_to_erl0) || 4492e48354ceSNicholas Bellinger atomic_read(&sess->session_logout) || 4493e48354ceSNicholas Bellinger (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { 4494e48354ceSNicholas Bellinger spin_unlock(&sess->conn_lock); 4495e48354ceSNicholas Bellinger continue; 4496e48354ceSNicholas Bellinger } 4497e48354ceSNicholas Bellinger atomic_set(&sess->session_reinstatement, 1); 4498e48354ceSNicholas Bellinger spin_unlock(&sess->conn_lock); 4499e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4500e48354ceSNicholas Bellinger 4501e48354ceSNicholas Bellinger iscsit_free_session(sess); 4502e48354ceSNicholas Bellinger spin_lock_bh(&se_tpg->session_lock); 4503e48354ceSNicholas Bellinger 4504e48354ceSNicholas Bellinger session_count++; 4505e48354ceSNicholas Bellinger } 4506e48354ceSNicholas Bellinger spin_unlock_bh(&se_tpg->session_lock); 4507e48354ceSNicholas Bellinger 4508e48354ceSNicholas Bellinger pr_debug("Released %d iSCSI Session(s) from Target Portal" 4509e48354ceSNicholas Bellinger " Group: %hu\n", session_count, tpg->tpgt); 4510e48354ceSNicholas Bellinger return 0; 4511e48354ceSNicholas Bellinger } 4512e48354ceSNicholas Bellinger 4513e48354ceSNicholas Bellinger MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); 4514e48354ceSNicholas Bellinger MODULE_VERSION("4.1.x"); 4515e48354ceSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 4516e48354ceSNicholas Bellinger MODULE_LICENSE("GPL"); 4517e48354ceSNicholas Bellinger 4518e48354ceSNicholas Bellinger module_init(iscsi_target_init_module); 4519e48354ceSNicholas Bellinger module_exit(iscsi_target_cleanup_module); 4520