1e48354ceSNicholas Bellinger /******************************************************************************* 2e48354ceSNicholas Bellinger * This file contains the iSCSI Target specific utility functions. 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/list.h> 22e48354ceSNicholas Bellinger #include <scsi/scsi_tcq.h> 23e48354ceSNicholas Bellinger #include <scsi/iscsi_proto.h> 24e48354ceSNicholas Bellinger #include <target/target_core_base.h> 25c4795fb2SChristoph Hellwig #include <target/target_core_fabric.h> 26e48354ceSNicholas Bellinger #include <target/target_core_configfs.h> 27e48354ceSNicholas Bellinger 28e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 29e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 38e48354ceSNicholas Bellinger #include "iscsi_target.h" 39e48354ceSNicholas Bellinger 40e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 41e48354ceSNicholas Bellinger { \ 42e48354ceSNicholas Bellinger int zzz; \ 43e48354ceSNicholas Bellinger \ 44e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 45e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 46e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 47e48354ceSNicholas Bellinger if (zzz) \ 48e48354ceSNicholas Bellinger pr_debug("\n"); \ 49e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 50e48354ceSNicholas Bellinger } \ 51e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 52e48354ceSNicholas Bellinger } \ 53e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 54e48354ceSNicholas Bellinger pr_debug("\n"); \ 55e48354ceSNicholas Bellinger } 56e48354ceSNicholas Bellinger 57e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 58e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 59e48354ceSNicholas Bellinger 60e48354ceSNicholas Bellinger /* 61e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 62e48354ceSNicholas Bellinger */ 63e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 64e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 65e48354ceSNicholas Bellinger u32 offset, 66e48354ceSNicholas Bellinger u32 xfer_len, 67e48354ceSNicholas Bellinger int recovery, 68e48354ceSNicholas Bellinger u32 r2t_sn) 69e48354ceSNicholas Bellinger { 70e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 71e48354ceSNicholas Bellinger 72e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 73e48354ceSNicholas Bellinger if (!r2t) { 74e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 75e48354ceSNicholas Bellinger return -1; 76e48354ceSNicholas Bellinger } 77e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 78e48354ceSNicholas Bellinger 79e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 80e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 81e48354ceSNicholas Bellinger r2t->offset = offset; 82e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 83e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 84e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 85e48354ceSNicholas Bellinger 86e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 87e48354ceSNicholas Bellinger 88e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 89e48354ceSNicholas Bellinger return 0; 90e48354ceSNicholas Bellinger } 91e48354ceSNicholas Bellinger 92e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 93e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 94e48354ceSNicholas Bellinger u32 offset, 95e48354ceSNicholas Bellinger u32 length) 96e48354ceSNicholas Bellinger { 97e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 98e48354ceSNicholas Bellinger 99e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 100e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 101e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 102e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 103e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 104e48354ceSNicholas Bellinger return r2t; 105e48354ceSNicholas Bellinger } 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 108e48354ceSNicholas Bellinger 109e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 110e48354ceSNicholas Bellinger " %u\n", offset, length); 111e48354ceSNicholas Bellinger return NULL; 112e48354ceSNicholas Bellinger } 113e48354ceSNicholas Bellinger 114e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 115e48354ceSNicholas Bellinger { 116e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 117e48354ceSNicholas Bellinger 118e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 119e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 120e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 121e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 122e48354ceSNicholas Bellinger return r2t; 123e48354ceSNicholas Bellinger } 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 126e48354ceSNicholas Bellinger 127e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 128e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 129e48354ceSNicholas Bellinger return NULL; 130e48354ceSNicholas Bellinger } 131e48354ceSNicholas Bellinger 132e48354ceSNicholas Bellinger /* 133e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 134e48354ceSNicholas Bellinger */ 135e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 136e48354ceSNicholas Bellinger { 137e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 138e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 139e48354ceSNicholas Bellinger } 140e48354ceSNicholas Bellinger 141e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 142e48354ceSNicholas Bellinger { 143e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 144e48354ceSNicholas Bellinger 145e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 146e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 147e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 148e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 149e48354ceSNicholas Bellinger } 150e48354ceSNicholas Bellinger 151e48354ceSNicholas Bellinger /* 152e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 153e48354ceSNicholas Bellinger * iSCSI NopINs. 154e48354ceSNicholas Bellinger */ 155e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 156e48354ceSNicholas Bellinger { 157e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 158e48354ceSNicholas Bellinger 159e48354ceSNicholas Bellinger cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); 160e48354ceSNicholas Bellinger if (!cmd) { 161e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); 162e48354ceSNicholas Bellinger return NULL; 163e48354ceSNicholas Bellinger } 164e48354ceSNicholas Bellinger 165e48354ceSNicholas Bellinger cmd->conn = conn; 1662fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 167e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 168e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 169e48354ceSNicholas Bellinger init_completion(&cmd->reject_comp); 170e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 171e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 172e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 173e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 174e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 175e48354ceSNicholas Bellinger 176e48354ceSNicholas Bellinger return cmd; 177e48354ceSNicholas Bellinger } 178e48354ceSNicholas Bellinger 179e48354ceSNicholas Bellinger /* 180e48354ceSNicholas Bellinger * Called from iscsi_handle_scsi_cmd() 181e48354ceSNicholas Bellinger */ 182e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_se_cmd( 183e48354ceSNicholas Bellinger struct iscsi_conn *conn, 184e48354ceSNicholas Bellinger u32 data_length, 185e48354ceSNicholas Bellinger int data_direction, 186e48354ceSNicholas Bellinger int iscsi_task_attr) 187e48354ceSNicholas Bellinger { 188e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 189e48354ceSNicholas Bellinger struct se_cmd *se_cmd; 190e48354ceSNicholas Bellinger int sam_task_attr; 191e48354ceSNicholas Bellinger 192e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 193e48354ceSNicholas Bellinger if (!cmd) 194e48354ceSNicholas Bellinger return NULL; 195e48354ceSNicholas Bellinger 196e48354ceSNicholas Bellinger cmd->data_direction = data_direction; 197e48354ceSNicholas Bellinger cmd->data_length = data_length; 198e48354ceSNicholas Bellinger /* 199e48354ceSNicholas Bellinger * Figure out the SAM Task Attribute for the incoming SCSI CDB 200e48354ceSNicholas Bellinger */ 201e48354ceSNicholas Bellinger if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || 202e48354ceSNicholas Bellinger (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) 203e48354ceSNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 204e48354ceSNicholas Bellinger else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) 205e48354ceSNicholas Bellinger sam_task_attr = MSG_ORDERED_TAG; 206e48354ceSNicholas Bellinger else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) 207e48354ceSNicholas Bellinger sam_task_attr = MSG_HEAD_TAG; 208e48354ceSNicholas Bellinger else if (iscsi_task_attr == ISCSI_ATTR_ACA) 209e48354ceSNicholas Bellinger sam_task_attr = MSG_ACA_TAG; 210e48354ceSNicholas Bellinger else { 211e48354ceSNicholas Bellinger pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" 212e48354ceSNicholas Bellinger " MSG_SIMPLE_TAG\n", iscsi_task_attr); 213e48354ceSNicholas Bellinger sam_task_attr = MSG_SIMPLE_TAG; 214e48354ceSNicholas Bellinger } 215e48354ceSNicholas Bellinger 216e48354ceSNicholas Bellinger se_cmd = &cmd->se_cmd; 217e48354ceSNicholas Bellinger /* 218e48354ceSNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 219e48354ceSNicholas Bellinger */ 220e48354ceSNicholas Bellinger transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops, 221e48354ceSNicholas Bellinger conn->sess->se_sess, data_length, data_direction, 222e48354ceSNicholas Bellinger sam_task_attr, &cmd->sense_buffer[0]); 223e48354ceSNicholas Bellinger return cmd; 224e48354ceSNicholas Bellinger } 225e48354ceSNicholas Bellinger 226e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_se_cmd_for_tmr( 227e48354ceSNicholas Bellinger struct iscsi_conn *conn, 228e48354ceSNicholas Bellinger u8 function) 229e48354ceSNicholas Bellinger { 230e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 231e48354ceSNicholas Bellinger struct se_cmd *se_cmd; 232c8e31f26SAndy Grover int rc; 233e48354ceSNicholas Bellinger u8 tcm_function; 234e48354ceSNicholas Bellinger 235e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); 236e48354ceSNicholas Bellinger if (!cmd) 237e48354ceSNicholas Bellinger return NULL; 238e48354ceSNicholas Bellinger 239e48354ceSNicholas Bellinger cmd->data_direction = DMA_NONE; 240e48354ceSNicholas Bellinger 241e48354ceSNicholas Bellinger cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); 242e48354ceSNicholas Bellinger if (!cmd->tmr_req) { 243e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 244e48354ceSNicholas Bellinger " Task Management command!\n"); 245ba773669SDan Carpenter goto out; 246e48354ceSNicholas Bellinger } 247e48354ceSNicholas Bellinger /* 248e48354ceSNicholas Bellinger * TASK_REASSIGN for ERL=2 / connection stays inside of 249e48354ceSNicholas Bellinger * LIO-Target $FABRIC_MOD 250e48354ceSNicholas Bellinger */ 251e48354ceSNicholas Bellinger if (function == ISCSI_TM_FUNC_TASK_REASSIGN) 252e48354ceSNicholas Bellinger return cmd; 253e48354ceSNicholas Bellinger 254e48354ceSNicholas Bellinger se_cmd = &cmd->se_cmd; 255e48354ceSNicholas Bellinger /* 256e48354ceSNicholas Bellinger * Initialize struct se_cmd descriptor from target_core_mod infrastructure 257e48354ceSNicholas Bellinger */ 258e48354ceSNicholas Bellinger transport_init_se_cmd(se_cmd, &lio_target_fabric_configfs->tf_ops, 259e48354ceSNicholas Bellinger conn->sess->se_sess, 0, DMA_NONE, 260e48354ceSNicholas Bellinger MSG_SIMPLE_TAG, &cmd->sense_buffer[0]); 261e48354ceSNicholas Bellinger 262e48354ceSNicholas Bellinger switch (function) { 263e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK: 264e48354ceSNicholas Bellinger tcm_function = TMR_ABORT_TASK; 265e48354ceSNicholas Bellinger break; 266e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_ABORT_TASK_SET: 267e48354ceSNicholas Bellinger tcm_function = TMR_ABORT_TASK_SET; 268e48354ceSNicholas Bellinger break; 269e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_ACA: 270e48354ceSNicholas Bellinger tcm_function = TMR_CLEAR_ACA; 271e48354ceSNicholas Bellinger break; 272e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_CLEAR_TASK_SET: 273e48354ceSNicholas Bellinger tcm_function = TMR_CLEAR_TASK_SET; 274e48354ceSNicholas Bellinger break; 275e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: 276e48354ceSNicholas Bellinger tcm_function = TMR_LUN_RESET; 277e48354ceSNicholas Bellinger break; 278e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_WARM_RESET: 279e48354ceSNicholas Bellinger tcm_function = TMR_TARGET_WARM_RESET; 280e48354ceSNicholas Bellinger break; 281e48354ceSNicholas Bellinger case ISCSI_TM_FUNC_TARGET_COLD_RESET: 282e48354ceSNicholas Bellinger tcm_function = TMR_TARGET_COLD_RESET; 283e48354ceSNicholas Bellinger break; 284e48354ceSNicholas Bellinger default: 285e48354ceSNicholas Bellinger pr_err("Unknown iSCSI TMR Function:" 286e48354ceSNicholas Bellinger " 0x%02x\n", function); 287e48354ceSNicholas Bellinger goto out; 288e48354ceSNicholas Bellinger } 289e48354ceSNicholas Bellinger 290c8e31f26SAndy Grover rc = core_tmr_alloc_req(se_cmd, cmd->tmr_req, tcm_function, GFP_KERNEL); 291c8e31f26SAndy Grover if (rc < 0) 292e48354ceSNicholas Bellinger goto out; 293e48354ceSNicholas Bellinger 294e48354ceSNicholas Bellinger cmd->tmr_req->se_tmr_req = se_cmd->se_tmr_req; 295e48354ceSNicholas Bellinger 296e48354ceSNicholas Bellinger return cmd; 297e48354ceSNicholas Bellinger out: 298e48354ceSNicholas Bellinger iscsit_release_cmd(cmd); 299e48354ceSNicholas Bellinger return NULL; 300e48354ceSNicholas Bellinger } 301e48354ceSNicholas Bellinger 302e48354ceSNicholas Bellinger int iscsit_decide_list_to_build( 303e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 304e48354ceSNicholas Bellinger u32 immediate_data_length) 305e48354ceSNicholas Bellinger { 306e48354ceSNicholas Bellinger struct iscsi_build_list bl; 307e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 308e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 309e48354ceSNicholas Bellinger struct iscsi_node_attrib *na; 310e48354ceSNicholas Bellinger 311e48354ceSNicholas Bellinger if (sess->sess_ops->DataSequenceInOrder && 312e48354ceSNicholas Bellinger sess->sess_ops->DataPDUInOrder) 313e48354ceSNicholas Bellinger return 0; 314e48354ceSNicholas Bellinger 315e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_NONE) 316e48354ceSNicholas Bellinger return 0; 317e48354ceSNicholas Bellinger 318e48354ceSNicholas Bellinger na = iscsit_tpg_get_node_attrib(sess); 319e48354ceSNicholas Bellinger memset(&bl, 0, sizeof(struct iscsi_build_list)); 320e48354ceSNicholas Bellinger 321e48354ceSNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) { 322e48354ceSNicholas Bellinger bl.data_direction = ISCSI_PDU_READ; 323e48354ceSNicholas Bellinger bl.type = PDULIST_NORMAL; 324e48354ceSNicholas Bellinger if (na->random_datain_pdu_offsets) 325e48354ceSNicholas Bellinger bl.randomize |= RANDOM_DATAIN_PDU_OFFSETS; 326e48354ceSNicholas Bellinger if (na->random_datain_seq_offsets) 327e48354ceSNicholas Bellinger bl.randomize |= RANDOM_DATAIN_SEQ_OFFSETS; 328e48354ceSNicholas Bellinger } else { 329e48354ceSNicholas Bellinger bl.data_direction = ISCSI_PDU_WRITE; 330e48354ceSNicholas Bellinger bl.immediate_data_length = immediate_data_length; 331e48354ceSNicholas Bellinger if (na->random_r2t_offsets) 332e48354ceSNicholas Bellinger bl.randomize |= RANDOM_R2T_OFFSETS; 333e48354ceSNicholas Bellinger 334e48354ceSNicholas Bellinger if (!cmd->immediate_data && !cmd->unsolicited_data) 335e48354ceSNicholas Bellinger bl.type = PDULIST_NORMAL; 336e48354ceSNicholas Bellinger else if (cmd->immediate_data && !cmd->unsolicited_data) 337e48354ceSNicholas Bellinger bl.type = PDULIST_IMMEDIATE; 338e48354ceSNicholas Bellinger else if (!cmd->immediate_data && cmd->unsolicited_data) 339e48354ceSNicholas Bellinger bl.type = PDULIST_UNSOLICITED; 340e48354ceSNicholas Bellinger else if (cmd->immediate_data && cmd->unsolicited_data) 341e48354ceSNicholas Bellinger bl.type = PDULIST_IMMEDIATE_AND_UNSOLICITED; 342e48354ceSNicholas Bellinger } 343e48354ceSNicholas Bellinger 344e48354ceSNicholas Bellinger return iscsit_do_build_list(cmd, &bl); 345e48354ceSNicholas Bellinger } 346e48354ceSNicholas Bellinger 347e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 348e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 349e48354ceSNicholas Bellinger u32 seq_send_order) 350e48354ceSNicholas Bellinger { 351e48354ceSNicholas Bellinger u32 i; 352e48354ceSNicholas Bellinger 353e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 354e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 355e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 356e48354ceSNicholas Bellinger 357e48354ceSNicholas Bellinger return NULL; 358e48354ceSNicholas Bellinger } 359e48354ceSNicholas Bellinger 360e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 361e48354ceSNicholas Bellinger { 362e48354ceSNicholas Bellinger u32 i; 363e48354ceSNicholas Bellinger 364e48354ceSNicholas Bellinger if (!cmd->seq_list) { 365e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 366e48354ceSNicholas Bellinger return NULL; 367e48354ceSNicholas Bellinger } 368e48354ceSNicholas Bellinger 369e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 370e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 371e48354ceSNicholas Bellinger continue; 372e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 373e48354ceSNicholas Bellinger cmd->seq_send_order++; 374e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 375e48354ceSNicholas Bellinger } 376e48354ceSNicholas Bellinger } 377e48354ceSNicholas Bellinger 378e48354ceSNicholas Bellinger return NULL; 379e48354ceSNicholas Bellinger } 380e48354ceSNicholas Bellinger 381e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 382e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 383e48354ceSNicholas Bellinger u32 r2t_sn) 384e48354ceSNicholas Bellinger { 385e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 386e48354ceSNicholas Bellinger 387e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 388e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 389e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 390e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 391e48354ceSNicholas Bellinger return r2t; 392e48354ceSNicholas Bellinger } 393e48354ceSNicholas Bellinger } 394e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 395e48354ceSNicholas Bellinger 396e48354ceSNicholas Bellinger return NULL; 397e48354ceSNicholas Bellinger } 398e48354ceSNicholas Bellinger 399e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 400e48354ceSNicholas Bellinger { 401e48354ceSNicholas Bellinger int ret; 402e48354ceSNicholas Bellinger 403e48354ceSNicholas Bellinger /* 404e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 405e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 406e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 407e48354ceSNicholas Bellinger * CRC failures. 408e48354ceSNicholas Bellinger */ 409e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 410e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 411e48354ceSNicholas Bellinger " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, 412e48354ceSNicholas Bellinger sess->max_cmd_sn); 413e48354ceSNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 416e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 417e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 418e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 419e48354ceSNicholas Bellinger sess->exp_cmd_sn); 420e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 421e48354ceSNicholas Bellinger 422e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 423e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 424e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 425e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 426e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 427e48354ceSNicholas Bellinger 428e48354ceSNicholas Bellinger } else { 429e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 430e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 431e48354ceSNicholas Bellinger sess->exp_cmd_sn); 432e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 433e48354ceSNicholas Bellinger } 434e48354ceSNicholas Bellinger 435e48354ceSNicholas Bellinger return ret; 436e48354ceSNicholas Bellinger } 437e48354ceSNicholas Bellinger 438e48354ceSNicholas Bellinger /* 439e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 440e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 441e48354ceSNicholas Bellinger */ 442e48354ceSNicholas Bellinger int iscsit_sequence_cmd( 443e48354ceSNicholas Bellinger struct iscsi_conn *conn, 444e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 445e48354ceSNicholas Bellinger u32 cmdsn) 446e48354ceSNicholas Bellinger { 447e48354ceSNicholas Bellinger int ret; 448e48354ceSNicholas Bellinger int cmdsn_ret; 449e48354ceSNicholas Bellinger 450e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 451e48354ceSNicholas Bellinger 452e48354ceSNicholas Bellinger cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, cmdsn); 453e48354ceSNicholas Bellinger switch (cmdsn_ret) { 454e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 455e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 456e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 457e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 458e48354ceSNicholas Bellinger break; 459e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 460e48354ceSNicholas Bellinger ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, cmdsn); 461e48354ceSNicholas Bellinger break; 462e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 463e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 464e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 465e48354ceSNicholas Bellinger ret = cmdsn_ret; 466e48354ceSNicholas Bellinger break; 467e48354ceSNicholas Bellinger default: 468e48354ceSNicholas Bellinger ret = cmdsn_ret; 469e48354ceSNicholas Bellinger break; 470e48354ceSNicholas Bellinger } 471e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 472e48354ceSNicholas Bellinger 473e48354ceSNicholas Bellinger return ret; 474e48354ceSNicholas Bellinger } 475e48354ceSNicholas Bellinger 476e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 477e48354ceSNicholas Bellinger { 478e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 479e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 480e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 481e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 482e48354ceSNicholas Bellinger 483e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 484e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 485e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 486e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 487e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 488e48354ceSNicholas Bellinger return -1; 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger 491e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 492e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 493e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 494e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 495e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 496e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 497e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 498e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 499e48354ceSNicholas Bellinger return -1; 500e48354ceSNicholas Bellinger } 501e48354ceSNicholas Bellinger 502e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 503e48354ceSNicholas Bellinger return 0; 504e48354ceSNicholas Bellinger 505e48354ceSNicholas Bellinger if (((cmd->first_burst_len + payload_length) != cmd->data_length) && 506e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 507e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 508e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 509e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 510e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 511e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 512e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength, cmd->data_length); 513e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 514e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 515e48354ceSNicholas Bellinger return -1; 516e48354ceSNicholas Bellinger } 517e48354ceSNicholas Bellinger return 0; 518e48354ceSNicholas Bellinger } 519e48354ceSNicholas Bellinger 520e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 521e48354ceSNicholas Bellinger struct iscsi_conn *conn, 522e48354ceSNicholas Bellinger u32 init_task_tag) 523e48354ceSNicholas Bellinger { 524e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 525e48354ceSNicholas Bellinger 526e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 5272fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 528e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 529e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 530e48354ceSNicholas Bellinger return cmd; 531e48354ceSNicholas Bellinger } 532e48354ceSNicholas Bellinger } 533e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 534e48354ceSNicholas Bellinger 535e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 536e48354ceSNicholas Bellinger init_task_tag, conn->cid); 537e48354ceSNicholas Bellinger return NULL; 538e48354ceSNicholas Bellinger } 539e48354ceSNicholas Bellinger 540e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 541e48354ceSNicholas Bellinger struct iscsi_conn *conn, 542e48354ceSNicholas Bellinger u32 init_task_tag, 543e48354ceSNicholas Bellinger u32 length) 544e48354ceSNicholas Bellinger { 545e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 546e48354ceSNicholas Bellinger 547e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 5482fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 549e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 550e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 551e48354ceSNicholas Bellinger return cmd; 552e48354ceSNicholas Bellinger } 553e48354ceSNicholas Bellinger } 554e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 555e48354ceSNicholas Bellinger 556e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 557e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 558e48354ceSNicholas Bellinger if (length) 559e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 560e48354ceSNicholas Bellinger 561e48354ceSNicholas Bellinger return NULL; 562e48354ceSNicholas Bellinger } 563e48354ceSNicholas Bellinger 564e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 565e48354ceSNicholas Bellinger struct iscsi_conn *conn, 566e48354ceSNicholas Bellinger u32 targ_xfer_tag) 567e48354ceSNicholas Bellinger { 568e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 569e48354ceSNicholas Bellinger 570e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 5712fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 572e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 573e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 574e48354ceSNicholas Bellinger return cmd; 575e48354ceSNicholas Bellinger } 576e48354ceSNicholas Bellinger } 577e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 578e48354ceSNicholas Bellinger 579e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 580e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 581e48354ceSNicholas Bellinger return NULL; 582e48354ceSNicholas Bellinger } 583e48354ceSNicholas Bellinger 584e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 585e48354ceSNicholas Bellinger struct iscsi_session *sess, 586e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 587e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 588e48354ceSNicholas Bellinger u32 init_task_tag) 589e48354ceSNicholas Bellinger { 590e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 591e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 592e48354ceSNicholas Bellinger /* 593e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 594e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 595e48354ceSNicholas Bellinger */ 596e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 597e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 598e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 5992fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 600e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 601e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 602e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 603e48354ceSNicholas Bellinger 604e48354ceSNicholas Bellinger *cr_ptr = cr; 605e48354ceSNicholas Bellinger *cmd_ptr = cmd; 606e48354ceSNicholas Bellinger return -2; 607e48354ceSNicholas Bellinger } 608e48354ceSNicholas Bellinger } 609e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 610e48354ceSNicholas Bellinger } 611e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 612e48354ceSNicholas Bellinger /* 613e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 614e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 615e48354ceSNicholas Bellinger */ 616e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 617e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 618e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 6192fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 620e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 621e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 622e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 623e48354ceSNicholas Bellinger 624e48354ceSNicholas Bellinger *cr_ptr = cr; 625e48354ceSNicholas Bellinger *cmd_ptr = cmd; 626e48354ceSNicholas Bellinger return 0; 627e48354ceSNicholas Bellinger } 628e48354ceSNicholas Bellinger } 629e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 630e48354ceSNicholas Bellinger } 631e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 632e48354ceSNicholas Bellinger 633e48354ceSNicholas Bellinger return -1; 634e48354ceSNicholas Bellinger } 635e48354ceSNicholas Bellinger 636e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 637e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 638e48354ceSNicholas Bellinger struct iscsi_conn *conn, 639e48354ceSNicholas Bellinger u8 state) 640e48354ceSNicholas Bellinger { 641e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 642e48354ceSNicholas Bellinger 643e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 644e48354ceSNicholas Bellinger if (!qr) { 645e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 646e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 647e48354ceSNicholas Bellinger return; 648e48354ceSNicholas Bellinger } 649e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 650e48354ceSNicholas Bellinger qr->cmd = cmd; 651e48354ceSNicholas Bellinger qr->state = state; 652e48354ceSNicholas Bellinger 653e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 654e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 655e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 656e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 657e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 658e48354ceSNicholas Bellinger 659e48354ceSNicholas Bellinger wake_up_process(conn->thread_set->tx_thread); 660e48354ceSNicholas Bellinger } 661e48354ceSNicholas Bellinger 662e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 663e48354ceSNicholas Bellinger { 664e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 665e48354ceSNicholas Bellinger 666e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 667e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 668e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 669e48354ceSNicholas Bellinger return NULL; 670e48354ceSNicholas Bellinger } 671e48354ceSNicholas Bellinger list_for_each_entry(qr, &conn->immed_queue_list, qr_list) 672e48354ceSNicholas Bellinger break; 673e48354ceSNicholas Bellinger 674e48354ceSNicholas Bellinger list_del(&qr->qr_list); 675e48354ceSNicholas Bellinger if (qr->cmd) 676e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 677e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 678e48354ceSNicholas Bellinger 679e48354ceSNicholas Bellinger return qr; 680e48354ceSNicholas Bellinger } 681e48354ceSNicholas Bellinger 682e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 683e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 684e48354ceSNicholas Bellinger struct iscsi_conn *conn) 685e48354ceSNicholas Bellinger { 686e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 687e48354ceSNicholas Bellinger 688e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 689e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 690e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 691e48354ceSNicholas Bellinger return; 692e48354ceSNicholas Bellinger } 693e48354ceSNicholas Bellinger 694e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 695e48354ceSNicholas Bellinger if (qr->cmd != cmd) 696e48354ceSNicholas Bellinger continue; 697e48354ceSNicholas Bellinger 698e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 699e48354ceSNicholas Bellinger list_del(&qr->qr_list); 700e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 701e48354ceSNicholas Bellinger } 702e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 703e48354ceSNicholas Bellinger 704e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 705e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 706e48354ceSNicholas Bellinger cmd->init_task_tag, 707e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 708e48354ceSNicholas Bellinger } 709e48354ceSNicholas Bellinger } 710e48354ceSNicholas Bellinger 711e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 712e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 713e48354ceSNicholas Bellinger struct iscsi_conn *conn, 714e48354ceSNicholas Bellinger u8 state) 715e48354ceSNicholas Bellinger { 716e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 717e48354ceSNicholas Bellinger 718e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 719e48354ceSNicholas Bellinger if (!qr) { 720e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 721e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 722e48354ceSNicholas Bellinger return; 723e48354ceSNicholas Bellinger } 724e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 725e48354ceSNicholas Bellinger qr->cmd = cmd; 726e48354ceSNicholas Bellinger qr->state = state; 727e48354ceSNicholas Bellinger 728e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 729e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 730e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 731e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 732e48354ceSNicholas Bellinger 733e48354ceSNicholas Bellinger wake_up_process(conn->thread_set->tx_thread); 734e48354ceSNicholas Bellinger } 735e48354ceSNicholas Bellinger 736e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 737e48354ceSNicholas Bellinger { 738e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 739e48354ceSNicholas Bellinger 740e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 741e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 742e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 743e48354ceSNicholas Bellinger return NULL; 744e48354ceSNicholas Bellinger } 745e48354ceSNicholas Bellinger 746e48354ceSNicholas Bellinger list_for_each_entry(qr, &conn->response_queue_list, qr_list) 747e48354ceSNicholas Bellinger break; 748e48354ceSNicholas Bellinger 749e48354ceSNicholas Bellinger list_del(&qr->qr_list); 750e48354ceSNicholas Bellinger if (qr->cmd) 751e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 752e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 753e48354ceSNicholas Bellinger 754e48354ceSNicholas Bellinger return qr; 755e48354ceSNicholas Bellinger } 756e48354ceSNicholas Bellinger 757e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 758e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 759e48354ceSNicholas Bellinger struct iscsi_conn *conn) 760e48354ceSNicholas Bellinger { 761e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 762e48354ceSNicholas Bellinger 763e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 764e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 765e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 766e48354ceSNicholas Bellinger return; 767e48354ceSNicholas Bellinger } 768e48354ceSNicholas Bellinger 769e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 770e48354ceSNicholas Bellinger qr_list) { 771e48354ceSNicholas Bellinger if (qr->cmd != cmd) 772e48354ceSNicholas Bellinger continue; 773e48354ceSNicholas Bellinger 774e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 775e48354ceSNicholas Bellinger list_del(&qr->qr_list); 776e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 777e48354ceSNicholas Bellinger } 778e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 779e48354ceSNicholas Bellinger 780e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 781e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 782e48354ceSNicholas Bellinger cmd->init_task_tag, 783e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 784e48354ceSNicholas Bellinger } 785e48354ceSNicholas Bellinger } 786e48354ceSNicholas Bellinger 787e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 788e48354ceSNicholas Bellinger { 789e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 792e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 793e48354ceSNicholas Bellinger list_del(&qr->qr_list); 794e48354ceSNicholas Bellinger if (qr->cmd) 795e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 796e48354ceSNicholas Bellinger 797e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 798e48354ceSNicholas Bellinger } 799e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 800e48354ceSNicholas Bellinger 801e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 802e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 803e48354ceSNicholas Bellinger qr_list) { 804e48354ceSNicholas Bellinger list_del(&qr->qr_list); 805e48354ceSNicholas Bellinger if (qr->cmd) 806e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 807e48354ceSNicholas Bellinger 808e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 809e48354ceSNicholas Bellinger } 810e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 811e48354ceSNicholas Bellinger } 812e48354ceSNicholas Bellinger 813e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 814e48354ceSNicholas Bellinger { 815e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 816e48354ceSNicholas Bellinger int i; 817e48354ceSNicholas Bellinger 818e48354ceSNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 819e48354ceSNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 820e48354ceSNicholas Bellinger 821e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 822e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 823e48354ceSNicholas Bellinger kfree(cmd->seq_list); 824e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 825e48354ceSNicholas Bellinger kfree(cmd->iov_data); 826e48354ceSNicholas Bellinger 827e48354ceSNicholas Bellinger for (i = 0; i < cmd->t_mem_sg_nents; i++) 828e48354ceSNicholas Bellinger __free_page(sg_page(&cmd->t_mem_sg[i])); 829e48354ceSNicholas Bellinger 830e48354ceSNicholas Bellinger kfree(cmd->t_mem_sg); 831e48354ceSNicholas Bellinger 832e48354ceSNicholas Bellinger if (conn) { 833e48354ceSNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 834e48354ceSNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 835e48354ceSNicholas Bellinger } 836e48354ceSNicholas Bellinger 837e48354ceSNicholas Bellinger kmem_cache_free(lio_cmd_cache, cmd); 838e48354ceSNicholas Bellinger } 839e48354ceSNicholas Bellinger 840d270190aSNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd) 841d270190aSNicholas Bellinger { 842d270190aSNicholas Bellinger /* 843d270190aSNicholas Bellinger * Determine if a struct se_cmd is assoicated with 844d270190aSNicholas Bellinger * this struct iscsi_cmd. 845d270190aSNicholas Bellinger */ 846d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 847d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 848d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 849d270190aSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 850d270190aSNicholas Bellinger break; 851c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 852c1ce4bd5SNicholas Bellinger /* 853c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 854c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 855c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 856c1ce4bd5SNicholas Bellinger */ 857c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 858c1ce4bd5SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 1); 859c1ce4bd5SNicholas Bellinger break; 860c1ce4bd5SNicholas Bellinger } 861c1ce4bd5SNicholas Bellinger /* Fall-through */ 862d270190aSNicholas Bellinger default: 863d270190aSNicholas Bellinger iscsit_release_cmd(cmd); 864d270190aSNicholas Bellinger break; 865d270190aSNicholas Bellinger } 866d270190aSNicholas Bellinger } 867d270190aSNicholas Bellinger 868e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 869e48354ceSNicholas Bellinger { 870e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 871e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 872e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 873e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 874e48354ceSNicholas Bellinger if (in_interrupt()) 875e48354ceSNicholas Bellinger return 2; 876e48354ceSNicholas Bellinger 877e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 878e48354ceSNicholas Bellinger return 1; 879e48354ceSNicholas Bellinger } 880e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 881e48354ceSNicholas Bellinger 882e48354ceSNicholas Bellinger return 0; 883e48354ceSNicholas Bellinger } 884e48354ceSNicholas Bellinger 885e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 886e48354ceSNicholas Bellinger { 887e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 888e48354ceSNicholas Bellinger sess->session_usage_count--; 889e48354ceSNicholas Bellinger 890e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 891e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 892e48354ceSNicholas Bellinger 893e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 894e48354ceSNicholas Bellinger } 895e48354ceSNicholas Bellinger 896e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 897e48354ceSNicholas Bellinger { 898e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 899e48354ceSNicholas Bellinger sess->session_usage_count++; 900e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 901e48354ceSNicholas Bellinger } 902e48354ceSNicholas Bellinger 903e48354ceSNicholas Bellinger /* 904e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 905e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 906e48354ceSNicholas Bellinger */ 907e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 908e48354ceSNicholas Bellinger { 909e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 910e48354ceSNicholas Bellinger /* 911e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 912e48354ceSNicholas Bellinger */ 913e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 914e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 915e48354ceSNicholas Bellinger 916e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 917e48354ceSNicholas Bellinger /* 918e48354ceSNicholas Bellinger * Account for the first Login Command received not 919e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 920e48354ceSNicholas Bellinger */ 921e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 922e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 923e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 924e48354ceSNicholas Bellinger } else { 925e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 926e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 927e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 928e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 929e48354ceSNicholas Bellinger } 930e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 931e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 932e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 933e48354ceSNicholas Bellinger } 934e48354ceSNicholas Bellinger 935e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 936e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 937e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 938e48354ceSNicholas Bellinger } else { 939e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 940e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 941e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 942e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 943e48354ceSNicholas Bellinger } 944e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 945e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 946e48354ceSNicholas Bellinger } 947e48354ceSNicholas Bellinger 948e48354ceSNicholas Bellinger return 0; 949e48354ceSNicholas Bellinger } 950e48354ceSNicholas Bellinger 951e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 952e48354ceSNicholas Bellinger { 953e48354ceSNicholas Bellinger struct iscsi_conn *conn; 954e48354ceSNicholas Bellinger 955e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 956e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 957e48354ceSNicholas Bellinger if ((conn->cid == cid) && 958e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 959e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 960e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 961e48354ceSNicholas Bellinger return conn; 962e48354ceSNicholas Bellinger } 963e48354ceSNicholas Bellinger } 964e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 965e48354ceSNicholas Bellinger 966e48354ceSNicholas Bellinger return NULL; 967e48354ceSNicholas Bellinger } 968e48354ceSNicholas Bellinger 969e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 970e48354ceSNicholas Bellinger { 971e48354ceSNicholas Bellinger struct iscsi_conn *conn; 972e48354ceSNicholas Bellinger 973e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 974e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 975e48354ceSNicholas Bellinger if (conn->cid == cid) { 976e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 977e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 978e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 979e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 980e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 981e48354ceSNicholas Bellinger return conn; 982e48354ceSNicholas Bellinger } 983e48354ceSNicholas Bellinger } 984e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 985e48354ceSNicholas Bellinger 986e48354ceSNicholas Bellinger return NULL; 987e48354ceSNicholas Bellinger } 988e48354ceSNicholas Bellinger 989e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 990e48354ceSNicholas Bellinger { 991e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 992e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 993e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 994e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 995e48354ceSNicholas Bellinger 996e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 997e48354ceSNicholas Bellinger return; 998e48354ceSNicholas Bellinger } 999e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 1000e48354ceSNicholas Bellinger } 1001e48354ceSNicholas Bellinger 1002e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 1003e48354ceSNicholas Bellinger { 1004e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 1005e48354ceSNicholas Bellinger conn->conn_usage_count--; 1006e48354ceSNicholas Bellinger 1007e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 1008e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 1009e48354ceSNicholas Bellinger 1010e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 1011e48354ceSNicholas Bellinger } 1012e48354ceSNicholas Bellinger 1013e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 1014e48354ceSNicholas Bellinger { 1015e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 1016e48354ceSNicholas Bellinger conn->conn_usage_count++; 1017e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 1018e48354ceSNicholas Bellinger } 1019e48354ceSNicholas Bellinger 1020e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 1021e48354ceSNicholas Bellinger { 1022e48354ceSNicholas Bellinger u8 state; 1023e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 1024e48354ceSNicholas Bellinger 1025e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 1026e48354ceSNicholas Bellinger if (!cmd) 1027e48354ceSNicholas Bellinger return -1; 1028e48354ceSNicholas Bellinger 1029e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 1030e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 1031e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 1032e48354ceSNicholas Bellinger cmd->init_task_tag = 0xFFFFFFFF; 1033e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 1034e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 1035e48354ceSNicholas Bellinger 0xFFFFFFFF; 1036e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 1037e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 1038e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 1039e48354ceSNicholas Bellinger 1040e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 10412fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 1042e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1043e48354ceSNicholas Bellinger 1044e48354ceSNicholas Bellinger if (want_response) 1045e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 1046e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 1047e48354ceSNicholas Bellinger 1048e48354ceSNicholas Bellinger return 0; 1049e48354ceSNicholas Bellinger } 1050e48354ceSNicholas Bellinger 1051e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 1052e48354ceSNicholas Bellinger { 1053e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1054e48354ceSNicholas Bellinger 1055e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1056e48354ceSNicholas Bellinger 1057e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1058e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 1059e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1060e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1061e48354ceSNicholas Bellinger return; 1062e48354ceSNicholas Bellinger } 1063e48354ceSNicholas Bellinger 1064e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 1065e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 1066e48354ceSNicholas Bellinger conn->sess->sid); 1067e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1068e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1069e48354ceSNicholas Bellinger 1070e48354ceSNicholas Bellinger { 1071e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 1072e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 1073e48354ceSNicholas Bellinger 1074e48354ceSNicholas Bellinger if (tiqn) { 1075e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 1076e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 10778359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 1078e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 1079e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 1080e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 1081e48354ceSNicholas Bellinger conn->sess->conn_timeout_errors++; 1082e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 1083e48354ceSNicholas Bellinger } 1084e48354ceSNicholas Bellinger } 1085e48354ceSNicholas Bellinger 1086e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 1087e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1088e48354ceSNicholas Bellinger } 1089e48354ceSNicholas Bellinger 1090e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 1091e48354ceSNicholas Bellinger { 1092e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1093e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1094e48354ceSNicholas Bellinger 1095e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1096e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1097e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1098e48354ceSNicholas Bellinger return; 1099e48354ceSNicholas Bellinger } 1100e48354ceSNicholas Bellinger 1101e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 1102e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 1103e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1104e48354ceSNicholas Bellinger } 1105e48354ceSNicholas Bellinger 1106e48354ceSNicholas Bellinger /* 1107e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1108e48354ceSNicholas Bellinger */ 1109e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 1110e48354ceSNicholas Bellinger { 1111e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1112e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1113e48354ceSNicholas Bellinger 1114e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1115e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1116e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1117e48354ceSNicholas Bellinger return; 1118e48354ceSNicholas Bellinger } 1119e48354ceSNicholas Bellinger 1120e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 1121e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 1122e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 1123e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 1124e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1125e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1126e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1127e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 1128e48354ceSNicholas Bellinger 1129e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1130e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 1131e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1132e48354ceSNicholas Bellinger } 1133e48354ceSNicholas Bellinger 1134e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1135e48354ceSNicholas Bellinger { 1136e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1137e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1138e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1139e48354ceSNicholas Bellinger return; 1140e48354ceSNicholas Bellinger } 1141e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1142e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1143e48354ceSNicholas Bellinger 1144e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1145e48354ceSNicholas Bellinger 1146e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1147e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1148e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1149e48354ceSNicholas Bellinger } 1150e48354ceSNicholas Bellinger 1151e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1152e48354ceSNicholas Bellinger { 1153e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1154e48354ceSNicholas Bellinger 1155e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1156e48354ceSNicholas Bellinger 1157e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1158e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1159e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1160e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1161e48354ceSNicholas Bellinger return; 1162e48354ceSNicholas Bellinger } 1163e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1164e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1165e48354ceSNicholas Bellinger 1166e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1167e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1168e48354ceSNicholas Bellinger } 1169e48354ceSNicholas Bellinger 1170e48354ceSNicholas Bellinger /* 1171e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1172e48354ceSNicholas Bellinger */ 1173e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1174e48354ceSNicholas Bellinger { 1175e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1176e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1177e48354ceSNicholas Bellinger /* 1178e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1179e48354ceSNicholas Bellinger */ 1180e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1181e48354ceSNicholas Bellinger return; 1182e48354ceSNicholas Bellinger 1183e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1184e48354ceSNicholas Bellinger return; 1185e48354ceSNicholas Bellinger 1186e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1187e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1188e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1189e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1190e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1191e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1192e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1193e48354ceSNicholas Bellinger 1194e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1195e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1196e48354ceSNicholas Bellinger } 1197e48354ceSNicholas Bellinger 1198e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1199e48354ceSNicholas Bellinger { 1200e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1201e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1202e48354ceSNicholas Bellinger /* 1203e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1204e48354ceSNicholas Bellinger */ 1205e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1206e48354ceSNicholas Bellinger return; 1207e48354ceSNicholas Bellinger 1208e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1209e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1210e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1211e48354ceSNicholas Bellinger return; 1212e48354ceSNicholas Bellinger } 1213e48354ceSNicholas Bellinger 1214e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1215e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1216e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1217e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1218e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1219e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1220e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1221e48354ceSNicholas Bellinger 1222e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1223e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1224e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1225e48354ceSNicholas Bellinger } 1226e48354ceSNicholas Bellinger 1227e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1228e48354ceSNicholas Bellinger { 1229e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1230e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1231e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1232e48354ceSNicholas Bellinger return; 1233e48354ceSNicholas Bellinger } 1234e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1235e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1236e48354ceSNicholas Bellinger 1237e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1238e48354ceSNicholas Bellinger 1239e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1240e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1241e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1242e48354ceSNicholas Bellinger } 1243e48354ceSNicholas Bellinger 1244e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1245e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1246e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1247e48354ceSNicholas Bellinger int use_misc) 1248e48354ceSNicholas Bellinger { 1249e48354ceSNicholas Bellinger int tx_sent, tx_size; 1250e48354ceSNicholas Bellinger u32 iov_count; 1251e48354ceSNicholas Bellinger struct kvec *iov; 1252e48354ceSNicholas Bellinger 1253e48354ceSNicholas Bellinger send_data: 1254e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1255e48354ceSNicholas Bellinger 1256e48354ceSNicholas Bellinger if (!use_misc) { 1257e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1258e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1259e48354ceSNicholas Bellinger } else { 1260e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1261e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1262e48354ceSNicholas Bellinger } 1263e48354ceSNicholas Bellinger 1264e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1265e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1266e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1267e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1268e48354ceSNicholas Bellinger goto send_data; 1269e48354ceSNicholas Bellinger } else 1270e48354ceSNicholas Bellinger return -1; 1271e48354ceSNicholas Bellinger } 1272e48354ceSNicholas Bellinger cmd->tx_size = 0; 1273e48354ceSNicholas Bellinger 1274e48354ceSNicholas Bellinger return 0; 1275e48354ceSNicholas Bellinger } 1276e48354ceSNicholas Bellinger 1277e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1278e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1279e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1280e48354ceSNicholas Bellinger { 1281e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1282e48354ceSNicholas Bellinger struct kvec iov; 1283e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1284e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 128540b05497SNicholas Bellinger int tx_sent, iov_off; 1286e48354ceSNicholas Bellinger 1287e48354ceSNicholas Bellinger send_hdr: 1288e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1289e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1290e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1291e48354ceSNicholas Bellinger 1292e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1293e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1294e48354ceSNicholas Bellinger 1295e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1296e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1297e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1298e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1299e48354ceSNicholas Bellinger goto send_hdr; 1300e48354ceSNicholas Bellinger } 1301e48354ceSNicholas Bellinger return -1; 1302e48354ceSNicholas Bellinger } 1303e48354ceSNicholas Bellinger 1304e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 130540b05497SNicholas Bellinger /* 130640b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 130740b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 130840b05497SNicholas Bellinger */ 130940b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1310e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 131140b05497SNicholas Bellinger if (cmd->padding) 131240b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 131340b05497SNicholas Bellinger else 131440b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 131540b05497SNicholas Bellinger } else { 131640b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 131740b05497SNicholas Bellinger } 1318e48354ceSNicholas Bellinger /* 1319e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1320e48354ceSNicholas Bellinger */ 1321e48354ceSNicholas Bellinger while (data_len) { 1322e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1323e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1324e48354ceSNicholas Bellinger send_pg: 1325e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1326e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1327e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1328e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1329e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1330e48354ceSNicholas Bellinger " -EAGAIN\n"); 1331e48354ceSNicholas Bellinger goto send_pg; 1332e48354ceSNicholas Bellinger } 1333e48354ceSNicholas Bellinger 1334e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1335e48354ceSNicholas Bellinger tx_sent); 1336e48354ceSNicholas Bellinger return -1; 1337e48354ceSNicholas Bellinger } 1338e48354ceSNicholas Bellinger 1339e48354ceSNicholas Bellinger data_len -= sub_len; 1340e48354ceSNicholas Bellinger offset = 0; 1341e48354ceSNicholas Bellinger sg = sg_next(sg); 1342e48354ceSNicholas Bellinger } 1343e48354ceSNicholas Bellinger 1344e48354ceSNicholas Bellinger send_padding: 1345e48354ceSNicholas Bellinger if (cmd->padding) { 134640b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1347e48354ceSNicholas Bellinger 1348e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1349e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1350e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1351e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1352e48354ceSNicholas Bellinger goto send_padding; 1353e48354ceSNicholas Bellinger } 1354e48354ceSNicholas Bellinger return -1; 1355e48354ceSNicholas Bellinger } 1356e48354ceSNicholas Bellinger } 1357e48354ceSNicholas Bellinger 1358e48354ceSNicholas Bellinger send_datacrc: 1359e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 136040b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1361e48354ceSNicholas Bellinger 1362e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1363e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1364e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1365e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1366e48354ceSNicholas Bellinger goto send_datacrc; 1367e48354ceSNicholas Bellinger } 1368e48354ceSNicholas Bellinger return -1; 1369e48354ceSNicholas Bellinger } 1370e48354ceSNicholas Bellinger } 1371e48354ceSNicholas Bellinger 1372e48354ceSNicholas Bellinger return 0; 1373e48354ceSNicholas Bellinger } 1374e48354ceSNicholas Bellinger 1375e48354ceSNicholas Bellinger /* 1376e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1377e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1378e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1379e48354ceSNicholas Bellinger * 1380e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1381e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1382e48354ceSNicholas Bellinger */ 1383e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1384e48354ceSNicholas Bellinger { 1385e48354ceSNicholas Bellinger u8 iscsi_hdr[ISCSI_HDR_LEN]; 1386e48354ceSNicholas Bellinger int err; 1387e48354ceSNicholas Bellinger struct kvec iov; 1388e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1389e48354ceSNicholas Bellinger 1390e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1391e48354ceSNicholas Bellinger 1392e48354ceSNicholas Bellinger memset(&iov, 0, sizeof(struct kvec)); 1393e48354ceSNicholas Bellinger memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN); 1394e48354ceSNicholas Bellinger 1395e48354ceSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&iscsi_hdr; 1396e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1397e48354ceSNicholas Bellinger hdr->status_class = status_class; 1398e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 1399e48354ceSNicholas Bellinger hdr->itt = cpu_to_be32(conn->login_itt); 1400e48354ceSNicholas Bellinger 1401e48354ceSNicholas Bellinger iov.iov_base = &iscsi_hdr; 1402e48354ceSNicholas Bellinger iov.iov_len = ISCSI_HDR_LEN; 1403e48354ceSNicholas Bellinger 1404e48354ceSNicholas Bellinger PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN); 1405e48354ceSNicholas Bellinger 1406e48354ceSNicholas Bellinger err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN); 1407e48354ceSNicholas Bellinger if (err != ISCSI_HDR_LEN) { 1408e48354ceSNicholas Bellinger pr_err("tx_data returned less than expected\n"); 1409e48354ceSNicholas Bellinger return -1; 1410e48354ceSNicholas Bellinger } 1411e48354ceSNicholas Bellinger 1412e48354ceSNicholas Bellinger return 0; 1413e48354ceSNicholas Bellinger } 1414e48354ceSNicholas Bellinger 1415e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1416e48354ceSNicholas Bellinger { 1417e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1418e48354ceSNicholas Bellinger 1419e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1420e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1421e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1422e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1423e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1424e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1425e48354ceSNicholas Bellinger 1426e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1427e48354ceSNicholas Bellinger } 1428e48354ceSNicholas Bellinger 1429e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1430e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1431e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1432e48354ceSNicholas Bellinger { 1433e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 14342ff017f5SNicholas Bellinger struct kvec *iov_p; 1435e48354ceSNicholas Bellinger struct msghdr msg; 1436e48354ceSNicholas Bellinger 1437e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1438e48354ceSNicholas Bellinger return -1; 1439e48354ceSNicholas Bellinger 1440e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1441e48354ceSNicholas Bellinger 1442e48354ceSNicholas Bellinger iov_p = count->iov; 1443e48354ceSNicholas Bellinger iov_len = count->iov_count; 1444e48354ceSNicholas Bellinger 1445e48354ceSNicholas Bellinger while (total_rx < data) { 1446e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1447e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1448e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1449e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1450e48354ceSNicholas Bellinger rx_loop, total_rx); 1451e48354ceSNicholas Bellinger return rx_loop; 1452e48354ceSNicholas Bellinger } 1453e48354ceSNicholas Bellinger total_rx += rx_loop; 1454e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1455e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1456e48354ceSNicholas Bellinger } 1457e48354ceSNicholas Bellinger 1458e48354ceSNicholas Bellinger return total_rx; 1459e48354ceSNicholas Bellinger } 1460e48354ceSNicholas Bellinger 1461e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1462e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1463e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1464e48354ceSNicholas Bellinger { 1465e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 14662ff017f5SNicholas Bellinger struct kvec *iov_p; 1467e48354ceSNicholas Bellinger struct msghdr msg; 1468e48354ceSNicholas Bellinger 1469e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1470e48354ceSNicholas Bellinger return -1; 1471e48354ceSNicholas Bellinger 1472e48354ceSNicholas Bellinger if (data <= 0) { 1473e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1474e48354ceSNicholas Bellinger return -1; 1475e48354ceSNicholas Bellinger } 1476e48354ceSNicholas Bellinger 1477e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1478e48354ceSNicholas Bellinger 1479e48354ceSNicholas Bellinger iov_p = count->iov; 1480e48354ceSNicholas Bellinger iov_len = count->iov_count; 1481e48354ceSNicholas Bellinger 1482e48354ceSNicholas Bellinger while (total_tx < data) { 1483e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1484e48354ceSNicholas Bellinger (data - total_tx)); 1485e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1486e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1487e48354ceSNicholas Bellinger tx_loop, total_tx); 1488e48354ceSNicholas Bellinger return tx_loop; 1489e48354ceSNicholas Bellinger } 1490e48354ceSNicholas Bellinger total_tx += tx_loop; 1491e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1492e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1493e48354ceSNicholas Bellinger } 1494e48354ceSNicholas Bellinger 1495e48354ceSNicholas Bellinger return total_tx; 1496e48354ceSNicholas Bellinger } 1497e48354ceSNicholas Bellinger 1498e48354ceSNicholas Bellinger int rx_data( 1499e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1500e48354ceSNicholas Bellinger struct kvec *iov, 1501e48354ceSNicholas Bellinger int iov_count, 1502e48354ceSNicholas Bellinger int data) 1503e48354ceSNicholas Bellinger { 1504e48354ceSNicholas Bellinger struct iscsi_data_count c; 1505e48354ceSNicholas Bellinger 1506e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1507e48354ceSNicholas Bellinger return -1; 1508e48354ceSNicholas Bellinger 1509e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1510e48354ceSNicholas Bellinger c.iov = iov; 1511e48354ceSNicholas Bellinger c.iov_count = iov_count; 1512e48354ceSNicholas Bellinger c.data_length = data; 1513e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1514e48354ceSNicholas Bellinger 1515e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1516e48354ceSNicholas Bellinger } 1517e48354ceSNicholas Bellinger 1518e48354ceSNicholas Bellinger int tx_data( 1519e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1520e48354ceSNicholas Bellinger struct kvec *iov, 1521e48354ceSNicholas Bellinger int iov_count, 1522e48354ceSNicholas Bellinger int data) 1523e48354ceSNicholas Bellinger { 1524e48354ceSNicholas Bellinger struct iscsi_data_count c; 1525e48354ceSNicholas Bellinger 1526e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1527e48354ceSNicholas Bellinger return -1; 1528e48354ceSNicholas Bellinger 1529e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1530e48354ceSNicholas Bellinger c.iov = iov; 1531e48354ceSNicholas Bellinger c.iov_count = iov_count; 1532e48354ceSNicholas Bellinger c.data_length = data; 1533e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1534e48354ceSNicholas Bellinger 1535e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1536e48354ceSNicholas Bellinger } 1537e48354ceSNicholas Bellinger 1538e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1539e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1540e48354ceSNicholas Bellinger u8 status_class, 1541e48354ceSNicholas Bellinger u8 status_detail) 1542e48354ceSNicholas Bellinger { 1543e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1544e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1545e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1546e48354ceSNicholas Bellinger 1547e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1548e48354ceSNicholas Bellinger if (!tiqn) 1549e48354ceSNicholas Bellinger return; 1550e48354ceSNicholas Bellinger 1551e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1552e48354ceSNicholas Bellinger 1553e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1554e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1555e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1556e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1557e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1558e48354ceSNicholas Bellinger return; 1559e48354ceSNicholas Bellinger } 1560e48354ceSNicholas Bellinger 1561e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1562e48354ceSNicholas Bellinger ls->accepts++; 1563e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1564e48354ceSNicholas Bellinger ls->redirects++; 1565e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1566e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1567e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1568e48354ceSNicholas Bellinger ls->authenticate_fails++; 1569e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1570e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1571e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1572e48354ceSNicholas Bellinger ls->authorize_fails++; 1573e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1574e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1575e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1576e48354ceSNicholas Bellinger ls->negotiate_fails++; 1577e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1578e48354ceSNicholas Bellinger } else { 1579e48354ceSNicholas Bellinger ls->other_fails++; 1580e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1581e48354ceSNicholas Bellinger } 1582e48354ceSNicholas Bellinger 1583e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1584e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1585e48354ceSNicholas Bellinger if (conn->param_list) 1586e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1587e48354ceSNicholas Bellinger conn->param_list); 1588e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1589e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1590e48354ceSNicholas Bellinger 1591e48354ceSNicholas Bellinger ls->last_intr_fail_ip_family = conn->sock->sk->sk_family; 1592e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1593e48354ceSNicholas Bellinger "%s", conn->login_ip); 1594e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1595e48354ceSNicholas Bellinger } 1596e48354ceSNicholas Bellinger 1597e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1598e48354ceSNicholas Bellinger } 1599e48354ceSNicholas Bellinger 1600e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1601e48354ceSNicholas Bellinger { 1602e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1603e48354ceSNicholas Bellinger 1604e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1605e48354ceSNicholas Bellinger return NULL; 1606e48354ceSNicholas Bellinger 1607e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1608e48354ceSNicholas Bellinger if (!tpg) 1609e48354ceSNicholas Bellinger return NULL; 1610e48354ceSNicholas Bellinger 1611e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1612e48354ceSNicholas Bellinger return NULL; 1613e48354ceSNicholas Bellinger 1614e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1615e48354ceSNicholas Bellinger } 1616