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> 27baa4d64bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 28e48354ceSNicholas Bellinger 29e48354ceSNicholas Bellinger #include "iscsi_target_core.h" 30e48354ceSNicholas Bellinger #include "iscsi_target_parameters.h" 31e48354ceSNicholas Bellinger #include "iscsi_target_seq_pdu_list.h" 32e48354ceSNicholas Bellinger #include "iscsi_target_datain_values.h" 33e48354ceSNicholas Bellinger #include "iscsi_target_erl0.h" 34e48354ceSNicholas Bellinger #include "iscsi_target_erl1.h" 35e48354ceSNicholas Bellinger #include "iscsi_target_erl2.h" 36e48354ceSNicholas Bellinger #include "iscsi_target_tpg.h" 37e48354ceSNicholas Bellinger #include "iscsi_target_tq.h" 38e48354ceSNicholas Bellinger #include "iscsi_target_util.h" 39e48354ceSNicholas Bellinger #include "iscsi_target.h" 40e48354ceSNicholas Bellinger 41e48354ceSNicholas Bellinger #define PRINT_BUFF(buff, len) \ 42e48354ceSNicholas Bellinger { \ 43e48354ceSNicholas Bellinger int zzz; \ 44e48354ceSNicholas Bellinger \ 45e48354ceSNicholas Bellinger pr_debug("%d:\n", __LINE__); \ 46e48354ceSNicholas Bellinger for (zzz = 0; zzz < len; zzz++) { \ 47e48354ceSNicholas Bellinger if (zzz % 16 == 0) { \ 48e48354ceSNicholas Bellinger if (zzz) \ 49e48354ceSNicholas Bellinger pr_debug("\n"); \ 50e48354ceSNicholas Bellinger pr_debug("%4i: ", zzz); \ 51e48354ceSNicholas Bellinger } \ 52e48354ceSNicholas Bellinger pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ 53e48354ceSNicholas Bellinger } \ 54e48354ceSNicholas Bellinger if ((len + 1) % 16) \ 55e48354ceSNicholas Bellinger pr_debug("\n"); \ 56e48354ceSNicholas Bellinger } 57e48354ceSNicholas Bellinger 58e48354ceSNicholas Bellinger extern struct list_head g_tiqn_list; 59e48354ceSNicholas Bellinger extern spinlock_t tiqn_lock; 60e48354ceSNicholas Bellinger 61e48354ceSNicholas Bellinger /* 62e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 63e48354ceSNicholas Bellinger */ 64e48354ceSNicholas Bellinger int iscsit_add_r2t_to_list( 65e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 66e48354ceSNicholas Bellinger u32 offset, 67e48354ceSNicholas Bellinger u32 xfer_len, 68e48354ceSNicholas Bellinger int recovery, 69e48354ceSNicholas Bellinger u32 r2t_sn) 70e48354ceSNicholas Bellinger { 71e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 72e48354ceSNicholas Bellinger 73e48354ceSNicholas Bellinger r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); 74e48354ceSNicholas Bellinger if (!r2t) { 75e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); 76e48354ceSNicholas Bellinger return -1; 77e48354ceSNicholas Bellinger } 78e48354ceSNicholas Bellinger INIT_LIST_HEAD(&r2t->r2t_list); 79e48354ceSNicholas Bellinger 80e48354ceSNicholas Bellinger r2t->recovery_r2t = recovery; 81e48354ceSNicholas Bellinger r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; 82e48354ceSNicholas Bellinger r2t->offset = offset; 83e48354ceSNicholas Bellinger r2t->xfer_len = xfer_len; 84e48354ceSNicholas Bellinger list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); 85e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 86e48354ceSNicholas Bellinger 87e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); 88e48354ceSNicholas Bellinger 89e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 90e48354ceSNicholas Bellinger return 0; 91e48354ceSNicholas Bellinger } 92e48354ceSNicholas Bellinger 93e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_for_eos( 94e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 95e48354ceSNicholas Bellinger u32 offset, 96e48354ceSNicholas Bellinger u32 length) 97e48354ceSNicholas Bellinger { 98e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 99e48354ceSNicholas Bellinger 100e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 101e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 102e48354ceSNicholas Bellinger if ((r2t->offset <= offset) && 103e48354ceSNicholas Bellinger (r2t->offset + r2t->xfer_len) >= (offset + length)) { 104e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 105e48354ceSNicholas Bellinger return r2t; 106e48354ceSNicholas Bellinger } 107e48354ceSNicholas Bellinger } 108e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 109e48354ceSNicholas Bellinger 110e48354ceSNicholas Bellinger pr_err("Unable to locate R2T for Offset: %u, Length:" 111e48354ceSNicholas Bellinger " %u\n", offset, length); 112e48354ceSNicholas Bellinger return NULL; 113e48354ceSNicholas Bellinger } 114e48354ceSNicholas Bellinger 115e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) 116e48354ceSNicholas Bellinger { 117e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 118e48354ceSNicholas Bellinger 119e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 120e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 121e48354ceSNicholas Bellinger if (!r2t->sent_r2t) { 122e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 123e48354ceSNicholas Bellinger return r2t; 124e48354ceSNicholas Bellinger } 125e48354ceSNicholas Bellinger } 126e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 127e48354ceSNicholas Bellinger 128e48354ceSNicholas Bellinger pr_err("Unable to locate next R2T to send for ITT:" 129e48354ceSNicholas Bellinger " 0x%08x.\n", cmd->init_task_tag); 130e48354ceSNicholas Bellinger return NULL; 131e48354ceSNicholas Bellinger } 132e48354ceSNicholas Bellinger 133e48354ceSNicholas Bellinger /* 134e48354ceSNicholas Bellinger * Called with cmd->r2t_lock held. 135e48354ceSNicholas Bellinger */ 136e48354ceSNicholas Bellinger void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) 137e48354ceSNicholas Bellinger { 138e48354ceSNicholas Bellinger list_del(&r2t->r2t_list); 139e48354ceSNicholas Bellinger kmem_cache_free(lio_r2t_cache, r2t); 140e48354ceSNicholas Bellinger } 141e48354ceSNicholas Bellinger 142e48354ceSNicholas Bellinger void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) 143e48354ceSNicholas Bellinger { 144e48354ceSNicholas Bellinger struct iscsi_r2t *r2t, *r2t_tmp; 145e48354ceSNicholas Bellinger 146e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 147e48354ceSNicholas Bellinger list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) 148e48354ceSNicholas Bellinger iscsit_free_r2t(r2t, cmd); 149e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 150e48354ceSNicholas Bellinger } 151e48354ceSNicholas Bellinger 152cdb72665SNicholas Bellinger struct iscsi_cmd *iscsit_alloc_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 153cdb72665SNicholas Bellinger { 154cdb72665SNicholas Bellinger struct iscsi_cmd *cmd; 155cdb72665SNicholas Bellinger 156cdb72665SNicholas Bellinger cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); 157cdb72665SNicholas Bellinger if (!cmd) 158cdb72665SNicholas Bellinger return NULL; 159cdb72665SNicholas Bellinger 160cdb72665SNicholas Bellinger cmd->release_cmd = &iscsit_release_cmd; 161cdb72665SNicholas Bellinger return cmd; 162cdb72665SNicholas Bellinger } 163cdb72665SNicholas Bellinger 164e48354ceSNicholas Bellinger /* 165e48354ceSNicholas Bellinger * May be called from software interrupt (timer) context for allocating 166e48354ceSNicholas Bellinger * iSCSI NopINs. 167e48354ceSNicholas Bellinger */ 168e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) 169e48354ceSNicholas Bellinger { 170e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 171e48354ceSNicholas Bellinger 172cdb72665SNicholas Bellinger cmd = conn->conn_transport->iscsit_alloc_cmd(conn, gfp_mask); 173e48354ceSNicholas Bellinger if (!cmd) { 174e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); 175e48354ceSNicholas Bellinger return NULL; 176e48354ceSNicholas Bellinger } 177e48354ceSNicholas Bellinger cmd->conn = conn; 1782fbb471eSAndy Grover INIT_LIST_HEAD(&cmd->i_conn_node); 179e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->datain_list); 180e48354ceSNicholas Bellinger INIT_LIST_HEAD(&cmd->cmd_r2t_list); 181e48354ceSNicholas Bellinger spin_lock_init(&cmd->datain_lock); 182e48354ceSNicholas Bellinger spin_lock_init(&cmd->dataout_timeout_lock); 183e48354ceSNicholas Bellinger spin_lock_init(&cmd->istate_lock); 184e48354ceSNicholas Bellinger spin_lock_init(&cmd->error_lock); 185e48354ceSNicholas Bellinger spin_lock_init(&cmd->r2t_lock); 186e48354ceSNicholas Bellinger 187e48354ceSNicholas Bellinger return cmd; 188e48354ceSNicholas Bellinger } 189cdb72665SNicholas Bellinger EXPORT_SYMBOL(iscsit_allocate_cmd); 190e48354ceSNicholas Bellinger 191e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_datain( 192e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 193e48354ceSNicholas Bellinger u32 seq_send_order) 194e48354ceSNicholas Bellinger { 195e48354ceSNicholas Bellinger u32 i; 196e48354ceSNicholas Bellinger 197e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) 198e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == seq_send_order) 199e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 200e48354ceSNicholas Bellinger 201e48354ceSNicholas Bellinger return NULL; 202e48354ceSNicholas Bellinger } 203e48354ceSNicholas Bellinger 204e48354ceSNicholas Bellinger struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) 205e48354ceSNicholas Bellinger { 206e48354ceSNicholas Bellinger u32 i; 207e48354ceSNicholas Bellinger 208e48354ceSNicholas Bellinger if (!cmd->seq_list) { 209e48354ceSNicholas Bellinger pr_err("struct iscsi_cmd->seq_list is NULL!\n"); 210e48354ceSNicholas Bellinger return NULL; 211e48354ceSNicholas Bellinger } 212e48354ceSNicholas Bellinger 213e48354ceSNicholas Bellinger for (i = 0; i < cmd->seq_count; i++) { 214e48354ceSNicholas Bellinger if (cmd->seq_list[i].type != SEQTYPE_NORMAL) 215e48354ceSNicholas Bellinger continue; 216e48354ceSNicholas Bellinger if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { 217e48354ceSNicholas Bellinger cmd->seq_send_order++; 218e48354ceSNicholas Bellinger return &cmd->seq_list[i]; 219e48354ceSNicholas Bellinger } 220e48354ceSNicholas Bellinger } 221e48354ceSNicholas Bellinger 222e48354ceSNicholas Bellinger return NULL; 223e48354ceSNicholas Bellinger } 224e48354ceSNicholas Bellinger 225e48354ceSNicholas Bellinger struct iscsi_r2t *iscsit_get_holder_for_r2tsn( 226e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 227e48354ceSNicholas Bellinger u32 r2t_sn) 228e48354ceSNicholas Bellinger { 229e48354ceSNicholas Bellinger struct iscsi_r2t *r2t; 230e48354ceSNicholas Bellinger 231e48354ceSNicholas Bellinger spin_lock_bh(&cmd->r2t_lock); 232e48354ceSNicholas Bellinger list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { 233e48354ceSNicholas Bellinger if (r2t->r2t_sn == r2t_sn) { 234e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 235e48354ceSNicholas Bellinger return r2t; 236e48354ceSNicholas Bellinger } 237e48354ceSNicholas Bellinger } 238e48354ceSNicholas Bellinger spin_unlock_bh(&cmd->r2t_lock); 239e48354ceSNicholas Bellinger 240e48354ceSNicholas Bellinger return NULL; 241e48354ceSNicholas Bellinger } 242e48354ceSNicholas Bellinger 243e48354ceSNicholas Bellinger static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) 244e48354ceSNicholas Bellinger { 245e48354ceSNicholas Bellinger int ret; 246e48354ceSNicholas Bellinger 247e48354ceSNicholas Bellinger /* 248e48354ceSNicholas Bellinger * This is the proper method of checking received CmdSN against 249e48354ceSNicholas Bellinger * ExpCmdSN and MaxCmdSN values, as well as accounting for out 250e48354ceSNicholas Bellinger * or order CmdSNs due to multiple connection sessions and/or 251e48354ceSNicholas Bellinger * CRC failures. 252e48354ceSNicholas Bellinger */ 253e48354ceSNicholas Bellinger if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { 254e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is greater than" 255e48354ceSNicholas Bellinger " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, 256e48354ceSNicholas Bellinger sess->max_cmd_sn); 257e48354ceSNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 258e48354ceSNicholas Bellinger 259e48354ceSNicholas Bellinger } else if (cmdsn == sess->exp_cmd_sn) { 260e48354ceSNicholas Bellinger sess->exp_cmd_sn++; 261e48354ceSNicholas Bellinger pr_debug("Received CmdSN matches ExpCmdSN," 262e48354ceSNicholas Bellinger " incremented ExpCmdSN to: 0x%08x\n", 263e48354ceSNicholas Bellinger sess->exp_cmd_sn); 264e48354ceSNicholas Bellinger ret = CMDSN_NORMAL_OPERATION; 265e48354ceSNicholas Bellinger 266e48354ceSNicholas Bellinger } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { 267e48354ceSNicholas Bellinger pr_debug("Received CmdSN: 0x%08x is greater" 268e48354ceSNicholas Bellinger " than ExpCmdSN: 0x%08x, not acknowledging.\n", 269e48354ceSNicholas Bellinger cmdsn, sess->exp_cmd_sn); 270e48354ceSNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 271e48354ceSNicholas Bellinger 272e48354ceSNicholas Bellinger } else { 273e48354ceSNicholas Bellinger pr_err("Received CmdSN: 0x%08x is less than" 274e48354ceSNicholas Bellinger " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, 275e48354ceSNicholas Bellinger sess->exp_cmd_sn); 276e48354ceSNicholas Bellinger ret = CMDSN_LOWER_THAN_EXP; 277e48354ceSNicholas Bellinger } 278e48354ceSNicholas Bellinger 279e48354ceSNicholas Bellinger return ret; 280e48354ceSNicholas Bellinger } 281e48354ceSNicholas Bellinger 282e48354ceSNicholas Bellinger /* 283e48354ceSNicholas Bellinger * Commands may be received out of order if MC/S is in use. 284e48354ceSNicholas Bellinger * Ensure they are executed in CmdSN order. 285e48354ceSNicholas Bellinger */ 286561bf158SNicholas Bellinger int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 287561bf158SNicholas Bellinger unsigned char *buf, __be32 cmdsn) 288e48354ceSNicholas Bellinger { 289561bf158SNicholas Bellinger int ret, cmdsn_ret; 290561bf158SNicholas Bellinger bool reject = false; 291561bf158SNicholas Bellinger u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; 292e48354ceSNicholas Bellinger 293e48354ceSNicholas Bellinger mutex_lock(&conn->sess->cmdsn_mutex); 294e48354ceSNicholas Bellinger 29550e5c87dSChristoph Hellwig cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); 296e48354ceSNicholas Bellinger switch (cmdsn_ret) { 297e48354ceSNicholas Bellinger case CMDSN_NORMAL_OPERATION: 298e48354ceSNicholas Bellinger ret = iscsit_execute_cmd(cmd, 0); 299e48354ceSNicholas Bellinger if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) 300e48354ceSNicholas Bellinger iscsit_execute_ooo_cmdsns(conn->sess); 301561bf158SNicholas Bellinger else if (ret < 0) { 302561bf158SNicholas Bellinger reject = true; 303561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 304561bf158SNicholas Bellinger } 305e48354ceSNicholas Bellinger break; 306e48354ceSNicholas Bellinger case CMDSN_HIGHER_THAN_EXP: 30750e5c87dSChristoph Hellwig ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); 308561bf158SNicholas Bellinger if (ret < 0) { 309561bf158SNicholas Bellinger reject = true; 310561bf158SNicholas Bellinger ret = CMDSN_ERROR_CANNOT_RECOVER; 311561bf158SNicholas Bellinger break; 312561bf158SNicholas Bellinger } 313561bf158SNicholas Bellinger ret = CMDSN_HIGHER_THAN_EXP; 314e48354ceSNicholas Bellinger break; 315e48354ceSNicholas Bellinger case CMDSN_LOWER_THAN_EXP: 316e48354ceSNicholas Bellinger cmd->i_state = ISTATE_REMOVE; 317e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); 318e48354ceSNicholas Bellinger ret = cmdsn_ret; 319e48354ceSNicholas Bellinger break; 320e48354ceSNicholas Bellinger default: 321561bf158SNicholas Bellinger reason = ISCSI_REASON_PROTOCOL_ERROR; 322561bf158SNicholas Bellinger reject = true; 323e48354ceSNicholas Bellinger ret = cmdsn_ret; 324e48354ceSNicholas Bellinger break; 325e48354ceSNicholas Bellinger } 326e48354ceSNicholas Bellinger mutex_unlock(&conn->sess->cmdsn_mutex); 327e48354ceSNicholas Bellinger 328561bf158SNicholas Bellinger if (reject) 329561bf158SNicholas Bellinger iscsit_reject_cmd(cmd, reason, buf); 330561bf158SNicholas Bellinger 331e48354ceSNicholas Bellinger return ret; 332e48354ceSNicholas Bellinger } 3333e1c81a9SNicholas Bellinger EXPORT_SYMBOL(iscsit_sequence_cmd); 334e48354ceSNicholas Bellinger 335e48354ceSNicholas Bellinger int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) 336e48354ceSNicholas Bellinger { 337e48354ceSNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 338e48354ceSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 339e48354ceSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *) buf; 340e48354ceSNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 341e48354ceSNicholas Bellinger 342e48354ceSNicholas Bellinger if (conn->sess->sess_ops->InitialR2T) { 343e48354ceSNicholas Bellinger pr_err("Received unexpected unsolicited data" 344e48354ceSNicholas Bellinger " while InitialR2T=Yes, protocol error.\n"); 345e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 346e48354ceSNicholas Bellinger TCM_UNEXPECTED_UNSOLICITED_DATA, 0); 347e48354ceSNicholas Bellinger return -1; 348e48354ceSNicholas Bellinger } 349e48354ceSNicholas Bellinger 350e48354ceSNicholas Bellinger if ((cmd->first_burst_len + payload_length) > 351e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength) { 352e48354ceSNicholas Bellinger pr_err("Total %u bytes exceeds FirstBurstLength: %u" 353e48354ceSNicholas Bellinger " for this Unsolicited DataOut Burst.\n", 354e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 355e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength); 356e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 357e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 358e48354ceSNicholas Bellinger return -1; 359e48354ceSNicholas Bellinger } 360e48354ceSNicholas Bellinger 361e48354ceSNicholas Bellinger if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) 362e48354ceSNicholas Bellinger return 0; 363e48354ceSNicholas Bellinger 364ebf1d95cSAndy Grover if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && 365e48354ceSNicholas Bellinger ((cmd->first_burst_len + payload_length) != 366e48354ceSNicholas Bellinger conn->sess->sess_ops->FirstBurstLength)) { 367e48354ceSNicholas Bellinger pr_err("Unsolicited non-immediate data received %u" 368e48354ceSNicholas Bellinger " does not equal FirstBurstLength: %u, and does" 369e48354ceSNicholas Bellinger " not equal ExpXferLen %u.\n", 370e48354ceSNicholas Bellinger (cmd->first_burst_len + payload_length), 371ebf1d95cSAndy Grover conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); 372e48354ceSNicholas Bellinger transport_send_check_condition_and_sense(se_cmd, 373e48354ceSNicholas Bellinger TCM_INCORRECT_AMOUNT_OF_DATA, 0); 374e48354ceSNicholas Bellinger return -1; 375e48354ceSNicholas Bellinger } 376e48354ceSNicholas Bellinger return 0; 377e48354ceSNicholas Bellinger } 378e48354ceSNicholas Bellinger 379e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt( 380e48354ceSNicholas Bellinger struct iscsi_conn *conn, 38166c7db68SChristoph Hellwig itt_t init_task_tag) 382e48354ceSNicholas Bellinger { 383e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 384e48354ceSNicholas Bellinger 385e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 3862fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 387e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 388e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 389e48354ceSNicholas Bellinger return cmd; 390e48354ceSNicholas Bellinger } 391e48354ceSNicholas Bellinger } 392e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 393e48354ceSNicholas Bellinger 394e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu", 395e48354ceSNicholas Bellinger init_task_tag, conn->cid); 396e48354ceSNicholas Bellinger return NULL; 397e48354ceSNicholas Bellinger } 398e48354ceSNicholas Bellinger 399e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( 400e48354ceSNicholas Bellinger struct iscsi_conn *conn, 40166c7db68SChristoph Hellwig itt_t init_task_tag, 402e48354ceSNicholas Bellinger u32 length) 403e48354ceSNicholas Bellinger { 404e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 405e48354ceSNicholas Bellinger 406e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4072fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 408e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 409e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 410e48354ceSNicholas Bellinger return cmd; 411e48354ceSNicholas Bellinger } 412e48354ceSNicholas Bellinger } 413e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 414e48354ceSNicholas Bellinger 415e48354ceSNicholas Bellinger pr_err("Unable to locate ITT: 0x%08x on CID: %hu," 416e48354ceSNicholas Bellinger " dumping payload\n", init_task_tag, conn->cid); 417e48354ceSNicholas Bellinger if (length) 418e48354ceSNicholas Bellinger iscsit_dump_data_payload(conn, length, 1); 419e48354ceSNicholas Bellinger 420e48354ceSNicholas Bellinger return NULL; 421e48354ceSNicholas Bellinger } 422e48354ceSNicholas Bellinger 423e48354ceSNicholas Bellinger struct iscsi_cmd *iscsit_find_cmd_from_ttt( 424e48354ceSNicholas Bellinger struct iscsi_conn *conn, 425e48354ceSNicholas Bellinger u32 targ_xfer_tag) 426e48354ceSNicholas Bellinger { 427e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 428e48354ceSNicholas Bellinger 429e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 4302fbb471eSAndy Grover list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { 431e48354ceSNicholas Bellinger if (cmd->targ_xfer_tag == targ_xfer_tag) { 432e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 433e48354ceSNicholas Bellinger return cmd; 434e48354ceSNicholas Bellinger } 435e48354ceSNicholas Bellinger } 436e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 437e48354ceSNicholas Bellinger 438e48354ceSNicholas Bellinger pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", 439e48354ceSNicholas Bellinger targ_xfer_tag, conn->cid); 440e48354ceSNicholas Bellinger return NULL; 441e48354ceSNicholas Bellinger } 442e48354ceSNicholas Bellinger 443e48354ceSNicholas Bellinger int iscsit_find_cmd_for_recovery( 444e48354ceSNicholas Bellinger struct iscsi_session *sess, 445e48354ceSNicholas Bellinger struct iscsi_cmd **cmd_ptr, 446e48354ceSNicholas Bellinger struct iscsi_conn_recovery **cr_ptr, 44766c7db68SChristoph Hellwig itt_t init_task_tag) 448e48354ceSNicholas Bellinger { 449e48354ceSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 450e48354ceSNicholas Bellinger struct iscsi_conn_recovery *cr; 451e48354ceSNicholas Bellinger /* 452e48354ceSNicholas Bellinger * Scan through the inactive connection recovery list's command list. 453e48354ceSNicholas Bellinger * If init_task_tag matches the command is still alligent. 454e48354ceSNicholas Bellinger */ 455e48354ceSNicholas Bellinger spin_lock(&sess->cr_i_lock); 456e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { 457e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4582fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 459e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 460e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 461e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 462e48354ceSNicholas Bellinger 463e48354ceSNicholas Bellinger *cr_ptr = cr; 464e48354ceSNicholas Bellinger *cmd_ptr = cmd; 465e48354ceSNicholas Bellinger return -2; 466e48354ceSNicholas Bellinger } 467e48354ceSNicholas Bellinger } 468e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 469e48354ceSNicholas Bellinger } 470e48354ceSNicholas Bellinger spin_unlock(&sess->cr_i_lock); 471e48354ceSNicholas Bellinger /* 472e48354ceSNicholas Bellinger * Scan through the active connection recovery list's command list. 473e48354ceSNicholas Bellinger * If init_task_tag matches the command is ready to be reassigned. 474e48354ceSNicholas Bellinger */ 475e48354ceSNicholas Bellinger spin_lock(&sess->cr_a_lock); 476e48354ceSNicholas Bellinger list_for_each_entry(cr, &sess->cr_active_list, cr_list) { 477e48354ceSNicholas Bellinger spin_lock(&cr->conn_recovery_cmd_lock); 4782fbb471eSAndy Grover list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { 479e48354ceSNicholas Bellinger if (cmd->init_task_tag == init_task_tag) { 480e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 481e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 482e48354ceSNicholas Bellinger 483e48354ceSNicholas Bellinger *cr_ptr = cr; 484e48354ceSNicholas Bellinger *cmd_ptr = cmd; 485e48354ceSNicholas Bellinger return 0; 486e48354ceSNicholas Bellinger } 487e48354ceSNicholas Bellinger } 488e48354ceSNicholas Bellinger spin_unlock(&cr->conn_recovery_cmd_lock); 489e48354ceSNicholas Bellinger } 490e48354ceSNicholas Bellinger spin_unlock(&sess->cr_a_lock); 491e48354ceSNicholas Bellinger 492e48354ceSNicholas Bellinger return -1; 493e48354ceSNicholas Bellinger } 494e48354ceSNicholas Bellinger 495e48354ceSNicholas Bellinger void iscsit_add_cmd_to_immediate_queue( 496e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 497e48354ceSNicholas Bellinger struct iscsi_conn *conn, 498e48354ceSNicholas Bellinger u8 state) 499e48354ceSNicholas Bellinger { 500e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 501e48354ceSNicholas Bellinger 502e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 503e48354ceSNicholas Bellinger if (!qr) { 504e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 505e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 506e48354ceSNicholas Bellinger return; 507e48354ceSNicholas Bellinger } 508e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 509e48354ceSNicholas Bellinger qr->cmd = cmd; 510e48354ceSNicholas Bellinger qr->state = state; 511e48354ceSNicholas Bellinger 512e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 513e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->immed_queue_list); 514e48354ceSNicholas Bellinger atomic_inc(&cmd->immed_queue_count); 515e48354ceSNicholas Bellinger atomic_set(&conn->check_immediate_queue, 1); 516e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 517e48354ceSNicholas Bellinger 518d5627acbSRoland Dreier wake_up(&conn->queues_wq); 519e48354ceSNicholas Bellinger } 520e48354ceSNicholas Bellinger 521e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) 522e48354ceSNicholas Bellinger { 523e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 524e48354ceSNicholas Bellinger 525e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 526e48354ceSNicholas Bellinger if (list_empty(&conn->immed_queue_list)) { 527e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 528e48354ceSNicholas Bellinger return NULL; 529e48354ceSNicholas Bellinger } 5301f981de5SRoland Dreier qr = list_first_entry(&conn->immed_queue_list, 5311f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 532e48354ceSNicholas Bellinger 533e48354ceSNicholas Bellinger list_del(&qr->qr_list); 534e48354ceSNicholas Bellinger if (qr->cmd) 535e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 536e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 537e48354ceSNicholas Bellinger 538e48354ceSNicholas Bellinger return qr; 539e48354ceSNicholas Bellinger } 540e48354ceSNicholas Bellinger 541e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_immediate_queue( 542e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 543e48354ceSNicholas Bellinger struct iscsi_conn *conn) 544e48354ceSNicholas Bellinger { 545e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 546e48354ceSNicholas Bellinger 547e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 548e48354ceSNicholas Bellinger if (!atomic_read(&cmd->immed_queue_count)) { 549e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 550e48354ceSNicholas Bellinger return; 551e48354ceSNicholas Bellinger } 552e48354ceSNicholas Bellinger 553e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 554e48354ceSNicholas Bellinger if (qr->cmd != cmd) 555e48354ceSNicholas Bellinger continue; 556e48354ceSNicholas Bellinger 557e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 558e48354ceSNicholas Bellinger list_del(&qr->qr_list); 559e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 560e48354ceSNicholas Bellinger } 561e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 562e48354ceSNicholas Bellinger 563e48354ceSNicholas Bellinger if (atomic_read(&cmd->immed_queue_count)) { 564e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x immed_queue_count: %d\n", 565e48354ceSNicholas Bellinger cmd->init_task_tag, 566e48354ceSNicholas Bellinger atomic_read(&cmd->immed_queue_count)); 567e48354ceSNicholas Bellinger } 568e48354ceSNicholas Bellinger } 569e48354ceSNicholas Bellinger 570e48354ceSNicholas Bellinger void iscsit_add_cmd_to_response_queue( 571e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 572e48354ceSNicholas Bellinger struct iscsi_conn *conn, 573e48354ceSNicholas Bellinger u8 state) 574e48354ceSNicholas Bellinger { 575e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 576e48354ceSNicholas Bellinger 577e48354ceSNicholas Bellinger qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); 578e48354ceSNicholas Bellinger if (!qr) { 579e48354ceSNicholas Bellinger pr_err("Unable to allocate memory for" 580e48354ceSNicholas Bellinger " struct iscsi_queue_req\n"); 581e48354ceSNicholas Bellinger return; 582e48354ceSNicholas Bellinger } 583e48354ceSNicholas Bellinger INIT_LIST_HEAD(&qr->qr_list); 584e48354ceSNicholas Bellinger qr->cmd = cmd; 585e48354ceSNicholas Bellinger qr->state = state; 586e48354ceSNicholas Bellinger 587e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 588e48354ceSNicholas Bellinger list_add_tail(&qr->qr_list, &conn->response_queue_list); 589e48354ceSNicholas Bellinger atomic_inc(&cmd->response_queue_count); 590e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 591e48354ceSNicholas Bellinger 592d5627acbSRoland Dreier wake_up(&conn->queues_wq); 593e48354ceSNicholas Bellinger } 594e48354ceSNicholas Bellinger 595e48354ceSNicholas Bellinger struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) 596e48354ceSNicholas Bellinger { 597e48354ceSNicholas Bellinger struct iscsi_queue_req *qr; 598e48354ceSNicholas Bellinger 599e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 600e48354ceSNicholas Bellinger if (list_empty(&conn->response_queue_list)) { 601e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 602e48354ceSNicholas Bellinger return NULL; 603e48354ceSNicholas Bellinger } 604e48354ceSNicholas Bellinger 6051f981de5SRoland Dreier qr = list_first_entry(&conn->response_queue_list, 6061f981de5SRoland Dreier struct iscsi_queue_req, qr_list); 607e48354ceSNicholas Bellinger 608e48354ceSNicholas Bellinger list_del(&qr->qr_list); 609e48354ceSNicholas Bellinger if (qr->cmd) 610e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 611e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 612e48354ceSNicholas Bellinger 613e48354ceSNicholas Bellinger return qr; 614e48354ceSNicholas Bellinger } 615e48354ceSNicholas Bellinger 616e48354ceSNicholas Bellinger static void iscsit_remove_cmd_from_response_queue( 617e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 618e48354ceSNicholas Bellinger struct iscsi_conn *conn) 619e48354ceSNicholas Bellinger { 620e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 621e48354ceSNicholas Bellinger 622e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 623e48354ceSNicholas Bellinger if (!atomic_read(&cmd->response_queue_count)) { 624e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 625e48354ceSNicholas Bellinger return; 626e48354ceSNicholas Bellinger } 627e48354ceSNicholas Bellinger 628e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 629e48354ceSNicholas Bellinger qr_list) { 630e48354ceSNicholas Bellinger if (qr->cmd != cmd) 631e48354ceSNicholas Bellinger continue; 632e48354ceSNicholas Bellinger 633e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 634e48354ceSNicholas Bellinger list_del(&qr->qr_list); 635e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 636e48354ceSNicholas Bellinger } 637e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 638e48354ceSNicholas Bellinger 639e48354ceSNicholas Bellinger if (atomic_read(&cmd->response_queue_count)) { 640e48354ceSNicholas Bellinger pr_err("ITT: 0x%08x response_queue_count: %d\n", 641e48354ceSNicholas Bellinger cmd->init_task_tag, 642e48354ceSNicholas Bellinger atomic_read(&cmd->response_queue_count)); 643e48354ceSNicholas Bellinger } 644e48354ceSNicholas Bellinger } 645e48354ceSNicholas Bellinger 646d5627acbSRoland Dreier bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) 647d5627acbSRoland Dreier { 648d5627acbSRoland Dreier bool empty; 649d5627acbSRoland Dreier 650d5627acbSRoland Dreier spin_lock_bh(&conn->immed_queue_lock); 651d5627acbSRoland Dreier empty = list_empty(&conn->immed_queue_list); 652d5627acbSRoland Dreier spin_unlock_bh(&conn->immed_queue_lock); 653d5627acbSRoland Dreier 654d5627acbSRoland Dreier if (!empty) 655d5627acbSRoland Dreier return empty; 656d5627acbSRoland Dreier 657d5627acbSRoland Dreier spin_lock_bh(&conn->response_queue_lock); 658d5627acbSRoland Dreier empty = list_empty(&conn->response_queue_list); 659d5627acbSRoland Dreier spin_unlock_bh(&conn->response_queue_lock); 660d5627acbSRoland Dreier 661d5627acbSRoland Dreier return empty; 662d5627acbSRoland Dreier } 663d5627acbSRoland Dreier 664e48354ceSNicholas Bellinger void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) 665e48354ceSNicholas Bellinger { 666e48354ceSNicholas Bellinger struct iscsi_queue_req *qr, *qr_tmp; 667e48354ceSNicholas Bellinger 668e48354ceSNicholas Bellinger spin_lock_bh(&conn->immed_queue_lock); 669e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { 670e48354ceSNicholas Bellinger list_del(&qr->qr_list); 671e48354ceSNicholas Bellinger if (qr->cmd) 672e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->immed_queue_count); 673e48354ceSNicholas Bellinger 674e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 675e48354ceSNicholas Bellinger } 676e48354ceSNicholas Bellinger spin_unlock_bh(&conn->immed_queue_lock); 677e48354ceSNicholas Bellinger 678e48354ceSNicholas Bellinger spin_lock_bh(&conn->response_queue_lock); 679e48354ceSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, 680e48354ceSNicholas Bellinger qr_list) { 681e48354ceSNicholas Bellinger list_del(&qr->qr_list); 682e48354ceSNicholas Bellinger if (qr->cmd) 683e48354ceSNicholas Bellinger atomic_dec(&qr->cmd->response_queue_count); 684e48354ceSNicholas Bellinger 685e48354ceSNicholas Bellinger kmem_cache_free(lio_qr_cache, qr); 686e48354ceSNicholas Bellinger } 687e48354ceSNicholas Bellinger spin_unlock_bh(&conn->response_queue_lock); 688e48354ceSNicholas Bellinger } 689e48354ceSNicholas Bellinger 690e48354ceSNicholas Bellinger void iscsit_release_cmd(struct iscsi_cmd *cmd) 691e48354ceSNicholas Bellinger { 692e48354ceSNicholas Bellinger kfree(cmd->buf_ptr); 693e48354ceSNicholas Bellinger kfree(cmd->pdu_list); 694e48354ceSNicholas Bellinger kfree(cmd->seq_list); 695e48354ceSNicholas Bellinger kfree(cmd->tmr_req); 696e48354ceSNicholas Bellinger kfree(cmd->iov_data); 6979864ca9dSNicholas Bellinger kfree(cmd->text_in_ptr); 698e48354ceSNicholas Bellinger 699e48354ceSNicholas Bellinger kmem_cache_free(lio_cmd_cache, cmd); 700e48354ceSNicholas Bellinger } 701e48354ceSNicholas Bellinger 702aafc9d15SNicholas Bellinger static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, 703aafc9d15SNicholas Bellinger bool check_queues) 704d270190aSNicholas Bellinger { 705aafc9d15SNicholas Bellinger struct iscsi_conn *conn = cmd->conn; 706aafc9d15SNicholas Bellinger 707aafc9d15SNicholas Bellinger if (scsi_cmd) { 708aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 709aafc9d15SNicholas Bellinger iscsit_stop_dataout_timer(cmd); 710aafc9d15SNicholas Bellinger iscsit_free_r2ts_from_list(cmd); 711aafc9d15SNicholas Bellinger } 712aafc9d15SNicholas Bellinger if (cmd->data_direction == DMA_FROM_DEVICE) 713aafc9d15SNicholas Bellinger iscsit_free_all_datain_reqs(cmd); 714aafc9d15SNicholas Bellinger } 715aafc9d15SNicholas Bellinger 716aafc9d15SNicholas Bellinger if (conn && check_queues) { 717aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_immediate_queue(cmd, conn); 718aafc9d15SNicholas Bellinger iscsit_remove_cmd_from_response_queue(cmd, conn); 719aafc9d15SNicholas Bellinger } 720aafc9d15SNicholas Bellinger } 721aafc9d15SNicholas Bellinger 722aafc9d15SNicholas Bellinger void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) 723aafc9d15SNicholas Bellinger { 724aafc9d15SNicholas Bellinger struct se_cmd *se_cmd = NULL; 725aafc9d15SNicholas Bellinger int rc; 726d270190aSNicholas Bellinger /* 72720879696SMasanari Iida * Determine if a struct se_cmd is associated with 728d270190aSNicholas Bellinger * this struct iscsi_cmd. 729d270190aSNicholas Bellinger */ 730d270190aSNicholas Bellinger switch (cmd->iscsi_opcode) { 731d270190aSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 732aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 733aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 734cdb72665SNicholas Bellinger /* 735cdb72665SNicholas Bellinger * Fallthrough 736cdb72665SNicholas Bellinger */ 737d270190aSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 738aafc9d15SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 739aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd && se_cmd->se_sess) { 740aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 741aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 742aafc9d15SNicholas Bellinger } 743d270190aSNicholas Bellinger break; 744c1ce4bd5SNicholas Bellinger case ISCSI_OP_REJECT: 745c1ce4bd5SNicholas Bellinger /* 746c1ce4bd5SNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 747c1ce4bd5SNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 748c1ce4bd5SNicholas Bellinger * associated cmd->se_cmd needs to be released. 749c1ce4bd5SNicholas Bellinger */ 750c1ce4bd5SNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 751aafc9d15SNicholas Bellinger se_cmd = &cmd->se_cmd; 752aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 753aafc9d15SNicholas Bellinger 754aafc9d15SNicholas Bellinger rc = transport_generic_free_cmd(&cmd->se_cmd, 1); 755aafc9d15SNicholas Bellinger if (!rc && shutdown && se_cmd->se_sess) { 756aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, true, shutdown); 757aafc9d15SNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 758aafc9d15SNicholas Bellinger } 759c1ce4bd5SNicholas Bellinger break; 760c1ce4bd5SNicholas Bellinger } 761c1ce4bd5SNicholas Bellinger /* Fall-through */ 762d270190aSNicholas Bellinger default: 763aafc9d15SNicholas Bellinger __iscsit_free_cmd(cmd, false, shutdown); 764cdb72665SNicholas Bellinger cmd->release_cmd(cmd); 765d270190aSNicholas Bellinger break; 766d270190aSNicholas Bellinger } 767d270190aSNicholas Bellinger } 768d270190aSNicholas Bellinger 769e48354ceSNicholas Bellinger int iscsit_check_session_usage_count(struct iscsi_session *sess) 770e48354ceSNicholas Bellinger { 771e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 772e48354ceSNicholas Bellinger if (sess->session_usage_count != 0) { 773e48354ceSNicholas Bellinger sess->session_waiting_on_uc = 1; 774e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 775e48354ceSNicholas Bellinger if (in_interrupt()) 776e48354ceSNicholas Bellinger return 2; 777e48354ceSNicholas Bellinger 778e48354ceSNicholas Bellinger wait_for_completion(&sess->session_waiting_on_uc_comp); 779e48354ceSNicholas Bellinger return 1; 780e48354ceSNicholas Bellinger } 781e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 782e48354ceSNicholas Bellinger 783e48354ceSNicholas Bellinger return 0; 784e48354ceSNicholas Bellinger } 785e48354ceSNicholas Bellinger 786e48354ceSNicholas Bellinger void iscsit_dec_session_usage_count(struct iscsi_session *sess) 787e48354ceSNicholas Bellinger { 788e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 789e48354ceSNicholas Bellinger sess->session_usage_count--; 790e48354ceSNicholas Bellinger 791e48354ceSNicholas Bellinger if (!sess->session_usage_count && sess->session_waiting_on_uc) 792e48354ceSNicholas Bellinger complete(&sess->session_waiting_on_uc_comp); 793e48354ceSNicholas Bellinger 794e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 795e48354ceSNicholas Bellinger } 796e48354ceSNicholas Bellinger 797e48354ceSNicholas Bellinger void iscsit_inc_session_usage_count(struct iscsi_session *sess) 798e48354ceSNicholas Bellinger { 799e48354ceSNicholas Bellinger spin_lock_bh(&sess->session_usage_lock); 800e48354ceSNicholas Bellinger sess->session_usage_count++; 801e48354ceSNicholas Bellinger spin_unlock_bh(&sess->session_usage_lock); 802e48354ceSNicholas Bellinger } 803e48354ceSNicholas Bellinger 804e48354ceSNicholas Bellinger /* 805e48354ceSNicholas Bellinger * Setup conn->if_marker and conn->of_marker values based upon 806e48354ceSNicholas Bellinger * the initial marker-less interval. (see iSCSI v19 A.2) 807e48354ceSNicholas Bellinger */ 808e48354ceSNicholas Bellinger int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) 809e48354ceSNicholas Bellinger { 810e48354ceSNicholas Bellinger int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; 811e48354ceSNicholas Bellinger /* 812e48354ceSNicholas Bellinger * IFMarkInt and OFMarkInt are negotiated as 32-bit words. 813e48354ceSNicholas Bellinger */ 814e48354ceSNicholas Bellinger u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); 815e48354ceSNicholas Bellinger u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); 816e48354ceSNicholas Bellinger 817e48354ceSNicholas Bellinger if (conn->conn_ops->OFMarker) { 818e48354ceSNicholas Bellinger /* 819e48354ceSNicholas Bellinger * Account for the first Login Command received not 820e48354ceSNicholas Bellinger * via iscsi_recv_msg(). 821e48354ceSNicholas Bellinger */ 822e48354ceSNicholas Bellinger conn->of_marker += ISCSI_HDR_LEN; 823e48354ceSNicholas Bellinger if (conn->of_marker <= OFMarkInt) { 824e48354ceSNicholas Bellinger conn->of_marker = (OFMarkInt - conn->of_marker); 825e48354ceSNicholas Bellinger } else { 826e48354ceSNicholas Bellinger login_ofmarker_count = (conn->of_marker / OFMarkInt); 827e48354ceSNicholas Bellinger next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + 828e48354ceSNicholas Bellinger (login_ofmarker_count * MARKER_SIZE); 829e48354ceSNicholas Bellinger conn->of_marker = (next_marker - conn->of_marker); 830e48354ceSNicholas Bellinger } 831e48354ceSNicholas Bellinger conn->of_marker_offset = 0; 832e48354ceSNicholas Bellinger pr_debug("Setting OFMarker value to %u based on Initial" 833e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->of_marker); 834e48354ceSNicholas Bellinger } 835e48354ceSNicholas Bellinger 836e48354ceSNicholas Bellinger if (conn->conn_ops->IFMarker) { 837e48354ceSNicholas Bellinger if (conn->if_marker <= IFMarkInt) { 838e48354ceSNicholas Bellinger conn->if_marker = (IFMarkInt - conn->if_marker); 839e48354ceSNicholas Bellinger } else { 840e48354ceSNicholas Bellinger login_ifmarker_count = (conn->if_marker / IFMarkInt); 841e48354ceSNicholas Bellinger next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + 842e48354ceSNicholas Bellinger (login_ifmarker_count * MARKER_SIZE); 843e48354ceSNicholas Bellinger conn->if_marker = (next_marker - conn->if_marker); 844e48354ceSNicholas Bellinger } 845e48354ceSNicholas Bellinger pr_debug("Setting IFMarker value to %u based on Initial" 846e48354ceSNicholas Bellinger " Markerless Interval.\n", conn->if_marker); 847e48354ceSNicholas Bellinger } 848e48354ceSNicholas Bellinger 849e48354ceSNicholas Bellinger return 0; 850e48354ceSNicholas Bellinger } 851e48354ceSNicholas Bellinger 852e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) 853e48354ceSNicholas Bellinger { 854e48354ceSNicholas Bellinger struct iscsi_conn *conn; 855e48354ceSNicholas Bellinger 856e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 857e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 858e48354ceSNicholas Bellinger if ((conn->cid == cid) && 859e48354ceSNicholas Bellinger (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { 860e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 861e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 862e48354ceSNicholas Bellinger return conn; 863e48354ceSNicholas Bellinger } 864e48354ceSNicholas Bellinger } 865e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 866e48354ceSNicholas Bellinger 867e48354ceSNicholas Bellinger return NULL; 868e48354ceSNicholas Bellinger } 869e48354ceSNicholas Bellinger 870e48354ceSNicholas Bellinger struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) 871e48354ceSNicholas Bellinger { 872e48354ceSNicholas Bellinger struct iscsi_conn *conn; 873e48354ceSNicholas Bellinger 874e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 875e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { 876e48354ceSNicholas Bellinger if (conn->cid == cid) { 877e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 878e48354ceSNicholas Bellinger spin_lock(&conn->state_lock); 879e48354ceSNicholas Bellinger atomic_set(&conn->connection_wait_rcfr, 1); 880e48354ceSNicholas Bellinger spin_unlock(&conn->state_lock); 881e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 882e48354ceSNicholas Bellinger return conn; 883e48354ceSNicholas Bellinger } 884e48354ceSNicholas Bellinger } 885e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 886e48354ceSNicholas Bellinger 887e48354ceSNicholas Bellinger return NULL; 888e48354ceSNicholas Bellinger } 889e48354ceSNicholas Bellinger 890e48354ceSNicholas Bellinger void iscsit_check_conn_usage_count(struct iscsi_conn *conn) 891e48354ceSNicholas Bellinger { 892e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 893e48354ceSNicholas Bellinger if (conn->conn_usage_count != 0) { 894e48354ceSNicholas Bellinger conn->conn_waiting_on_uc = 1; 895e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 896e48354ceSNicholas Bellinger 897e48354ceSNicholas Bellinger wait_for_completion(&conn->conn_waiting_on_uc_comp); 898e48354ceSNicholas Bellinger return; 899e48354ceSNicholas Bellinger } 900e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 901e48354ceSNicholas Bellinger } 902e48354ceSNicholas Bellinger 903e48354ceSNicholas Bellinger void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) 904e48354ceSNicholas Bellinger { 905e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 906e48354ceSNicholas Bellinger conn->conn_usage_count--; 907e48354ceSNicholas Bellinger 908e48354ceSNicholas Bellinger if (!conn->conn_usage_count && conn->conn_waiting_on_uc) 909e48354ceSNicholas Bellinger complete(&conn->conn_waiting_on_uc_comp); 910e48354ceSNicholas Bellinger 911e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 912e48354ceSNicholas Bellinger } 913e48354ceSNicholas Bellinger 914e48354ceSNicholas Bellinger void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) 915e48354ceSNicholas Bellinger { 916e48354ceSNicholas Bellinger spin_lock_bh(&conn->conn_usage_lock); 917e48354ceSNicholas Bellinger conn->conn_usage_count++; 918e48354ceSNicholas Bellinger spin_unlock_bh(&conn->conn_usage_lock); 919e48354ceSNicholas Bellinger } 920e48354ceSNicholas Bellinger 921e48354ceSNicholas Bellinger static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) 922e48354ceSNicholas Bellinger { 923e48354ceSNicholas Bellinger u8 state; 924e48354ceSNicholas Bellinger struct iscsi_cmd *cmd; 925e48354ceSNicholas Bellinger 926e48354ceSNicholas Bellinger cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); 927e48354ceSNicholas Bellinger if (!cmd) 928e48354ceSNicholas Bellinger return -1; 929e48354ceSNicholas Bellinger 930e48354ceSNicholas Bellinger cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; 931e48354ceSNicholas Bellinger state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : 932e48354ceSNicholas Bellinger ISTATE_SEND_NOPIN_NO_RESPONSE; 93366c7db68SChristoph Hellwig cmd->init_task_tag = RESERVED_ITT; 934e48354ceSNicholas Bellinger spin_lock_bh(&conn->sess->ttt_lock); 935e48354ceSNicholas Bellinger cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : 936e48354ceSNicholas Bellinger 0xFFFFFFFF; 937e48354ceSNicholas Bellinger if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) 938e48354ceSNicholas Bellinger cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; 939e48354ceSNicholas Bellinger spin_unlock_bh(&conn->sess->ttt_lock); 940e48354ceSNicholas Bellinger 941e48354ceSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 9422fbb471eSAndy Grover list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); 943e48354ceSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 944e48354ceSNicholas Bellinger 945e48354ceSNicholas Bellinger if (want_response) 946e48354ceSNicholas Bellinger iscsit_start_nopin_response_timer(conn); 947e48354ceSNicholas Bellinger iscsit_add_cmd_to_immediate_queue(cmd, conn, state); 948e48354ceSNicholas Bellinger 949e48354ceSNicholas Bellinger return 0; 950e48354ceSNicholas Bellinger } 951e48354ceSNicholas Bellinger 952e48354ceSNicholas Bellinger static void iscsit_handle_nopin_response_timeout(unsigned long data) 953e48354ceSNicholas Bellinger { 954e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 955e48354ceSNicholas Bellinger 956e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 957e48354ceSNicholas Bellinger 958e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 959e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { 960e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 961e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 962e48354ceSNicholas Bellinger return; 963e48354ceSNicholas Bellinger } 964e48354ceSNicholas Bellinger 965e48354ceSNicholas Bellinger pr_debug("Did not receive response to NOPIN on CID: %hu on" 966e48354ceSNicholas Bellinger " SID: %u, failing connection.\n", conn->cid, 967e48354ceSNicholas Bellinger conn->sess->sid); 968e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 969e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 970e48354ceSNicholas Bellinger 971e48354ceSNicholas Bellinger { 972e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg = conn->sess->tpg; 973e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; 974e48354ceSNicholas Bellinger 975e48354ceSNicholas Bellinger if (tiqn) { 976e48354ceSNicholas Bellinger spin_lock_bh(&tiqn->sess_err_stats.lock); 977e48354ceSNicholas Bellinger strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, 9788359cf43SJörn Engel conn->sess->sess_ops->InitiatorName); 979e48354ceSNicholas Bellinger tiqn->sess_err_stats.last_sess_failure_type = 980e48354ceSNicholas Bellinger ISCSI_SESS_ERR_CXN_TIMEOUT; 981e48354ceSNicholas Bellinger tiqn->sess_err_stats.cxn_timeout_errors++; 982e48354ceSNicholas Bellinger conn->sess->conn_timeout_errors++; 983e48354ceSNicholas Bellinger spin_unlock_bh(&tiqn->sess_err_stats.lock); 984e48354ceSNicholas Bellinger } 985e48354ceSNicholas Bellinger } 986e48354ceSNicholas Bellinger 987e48354ceSNicholas Bellinger iscsit_cause_connection_reinstatement(conn, 0); 988e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 989e48354ceSNicholas Bellinger } 990e48354ceSNicholas Bellinger 991e48354ceSNicholas Bellinger void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) 992e48354ceSNicholas Bellinger { 993e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 994e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 995e48354ceSNicholas Bellinger 996e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 997e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 998e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 999e48354ceSNicholas Bellinger return; 1000e48354ceSNicholas Bellinger } 1001e48354ceSNicholas Bellinger 1002e48354ceSNicholas Bellinger mod_timer(&conn->nopin_response_timer, 1003e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ)); 1004e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1005e48354ceSNicholas Bellinger } 1006e48354ceSNicholas Bellinger 1007e48354ceSNicholas Bellinger /* 1008e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1009e48354ceSNicholas Bellinger */ 1010e48354ceSNicholas Bellinger void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) 1011e48354ceSNicholas Bellinger { 1012e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1013e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1014e48354ceSNicholas Bellinger 1015e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1016e48354ceSNicholas Bellinger if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { 1017e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1018e48354ceSNicholas Bellinger return; 1019e48354ceSNicholas Bellinger } 1020e48354ceSNicholas Bellinger 1021e48354ceSNicholas Bellinger init_timer(&conn->nopin_response_timer); 1022e48354ceSNicholas Bellinger conn->nopin_response_timer.expires = 1023e48354ceSNicholas Bellinger (get_jiffies_64() + na->nopin_response_timeout * HZ); 1024e48354ceSNicholas Bellinger conn->nopin_response_timer.data = (unsigned long)conn; 1025e48354ceSNicholas Bellinger conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; 1026e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; 1027e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; 1028e48354ceSNicholas Bellinger add_timer(&conn->nopin_response_timer); 1029e48354ceSNicholas Bellinger 1030e48354ceSNicholas Bellinger pr_debug("Started NOPIN Response Timer on CID: %d to %u" 1031e48354ceSNicholas Bellinger " seconds\n", conn->cid, na->nopin_response_timeout); 1032e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1033e48354ceSNicholas Bellinger } 1034e48354ceSNicholas Bellinger 1035e48354ceSNicholas Bellinger void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) 1036e48354ceSNicholas Bellinger { 1037e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1038e48354ceSNicholas Bellinger if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { 1039e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1040e48354ceSNicholas Bellinger return; 1041e48354ceSNicholas Bellinger } 1042e48354ceSNicholas Bellinger conn->nopin_response_timer_flags |= ISCSI_TF_STOP; 1043e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1044e48354ceSNicholas Bellinger 1045e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_response_timer); 1046e48354ceSNicholas Bellinger 1047e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1048e48354ceSNicholas Bellinger conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; 1049e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1050e48354ceSNicholas Bellinger } 1051e48354ceSNicholas Bellinger 1052e48354ceSNicholas Bellinger static void iscsit_handle_nopin_timeout(unsigned long data) 1053e48354ceSNicholas Bellinger { 1054e48354ceSNicholas Bellinger struct iscsi_conn *conn = (struct iscsi_conn *) data; 1055e48354ceSNicholas Bellinger 1056e48354ceSNicholas Bellinger iscsit_inc_conn_usage_count(conn); 1057e48354ceSNicholas Bellinger 1058e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1059e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_STOP) { 1060e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1061e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1062e48354ceSNicholas Bellinger return; 1063e48354ceSNicholas Bellinger } 1064e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1065e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1066e48354ceSNicholas Bellinger 1067e48354ceSNicholas Bellinger iscsit_add_nopin(conn, 1); 1068e48354ceSNicholas Bellinger iscsit_dec_conn_usage_count(conn); 1069e48354ceSNicholas Bellinger } 1070e48354ceSNicholas Bellinger 1071e48354ceSNicholas Bellinger /* 1072e48354ceSNicholas Bellinger * Called with conn->nopin_timer_lock held. 1073e48354ceSNicholas Bellinger */ 1074e48354ceSNicholas Bellinger void __iscsit_start_nopin_timer(struct iscsi_conn *conn) 1075e48354ceSNicholas Bellinger { 1076e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1077e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1078e48354ceSNicholas Bellinger /* 1079e48354ceSNicholas Bellinger * NOPIN timeout is disabled. 1080e48354ceSNicholas Bellinger */ 1081e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1082e48354ceSNicholas Bellinger return; 1083e48354ceSNicholas Bellinger 1084e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) 1085e48354ceSNicholas Bellinger return; 1086e48354ceSNicholas Bellinger 1087e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1088e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1089e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1090e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1091e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1092e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1093e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1094e48354ceSNicholas Bellinger 1095e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1096e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1097e48354ceSNicholas Bellinger } 1098e48354ceSNicholas Bellinger 1099e48354ceSNicholas Bellinger void iscsit_start_nopin_timer(struct iscsi_conn *conn) 1100e48354ceSNicholas Bellinger { 1101e48354ceSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1102e48354ceSNicholas Bellinger struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); 1103e48354ceSNicholas Bellinger /* 1104e48354ceSNicholas Bellinger * NOPIN timeout is disabled.. 1105e48354ceSNicholas Bellinger */ 1106e48354ceSNicholas Bellinger if (!na->nopin_timeout) 1107e48354ceSNicholas Bellinger return; 1108e48354ceSNicholas Bellinger 1109e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1110e48354ceSNicholas Bellinger if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { 1111e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1112e48354ceSNicholas Bellinger return; 1113e48354ceSNicholas Bellinger } 1114e48354ceSNicholas Bellinger 1115e48354ceSNicholas Bellinger init_timer(&conn->nopin_timer); 1116e48354ceSNicholas Bellinger conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); 1117e48354ceSNicholas Bellinger conn->nopin_timer.data = (unsigned long)conn; 1118e48354ceSNicholas Bellinger conn->nopin_timer.function = iscsit_handle_nopin_timeout; 1119e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_STOP; 1120e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_RUNNING; 1121e48354ceSNicholas Bellinger add_timer(&conn->nopin_timer); 1122e48354ceSNicholas Bellinger 1123e48354ceSNicholas Bellinger pr_debug("Started NOPIN Timer on CID: %d at %u second" 1124e48354ceSNicholas Bellinger " interval\n", conn->cid, na->nopin_timeout); 1125e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1126e48354ceSNicholas Bellinger } 1127e48354ceSNicholas Bellinger 1128e48354ceSNicholas Bellinger void iscsit_stop_nopin_timer(struct iscsi_conn *conn) 1129e48354ceSNicholas Bellinger { 1130e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1131e48354ceSNicholas Bellinger if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { 1132e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1133e48354ceSNicholas Bellinger return; 1134e48354ceSNicholas Bellinger } 1135e48354ceSNicholas Bellinger conn->nopin_timer_flags |= ISCSI_TF_STOP; 1136e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1137e48354ceSNicholas Bellinger 1138e48354ceSNicholas Bellinger del_timer_sync(&conn->nopin_timer); 1139e48354ceSNicholas Bellinger 1140e48354ceSNicholas Bellinger spin_lock_bh(&conn->nopin_timer_lock); 1141e48354ceSNicholas Bellinger conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; 1142e48354ceSNicholas Bellinger spin_unlock_bh(&conn->nopin_timer_lock); 1143e48354ceSNicholas Bellinger } 1144e48354ceSNicholas Bellinger 1145e48354ceSNicholas Bellinger int iscsit_send_tx_data( 1146e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1147e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1148e48354ceSNicholas Bellinger int use_misc) 1149e48354ceSNicholas Bellinger { 1150e48354ceSNicholas Bellinger int tx_sent, tx_size; 1151e48354ceSNicholas Bellinger u32 iov_count; 1152e48354ceSNicholas Bellinger struct kvec *iov; 1153e48354ceSNicholas Bellinger 1154e48354ceSNicholas Bellinger send_data: 1155e48354ceSNicholas Bellinger tx_size = cmd->tx_size; 1156e48354ceSNicholas Bellinger 1157e48354ceSNicholas Bellinger if (!use_misc) { 1158e48354ceSNicholas Bellinger iov = &cmd->iov_data[0]; 1159e48354ceSNicholas Bellinger iov_count = cmd->iov_data_count; 1160e48354ceSNicholas Bellinger } else { 1161e48354ceSNicholas Bellinger iov = &cmd->iov_misc[0]; 1162e48354ceSNicholas Bellinger iov_count = cmd->iov_misc_count; 1163e48354ceSNicholas Bellinger } 1164e48354ceSNicholas Bellinger 1165e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); 1166e48354ceSNicholas Bellinger if (tx_size != tx_sent) { 1167e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1168e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1169e48354ceSNicholas Bellinger goto send_data; 1170e48354ceSNicholas Bellinger } else 1171e48354ceSNicholas Bellinger return -1; 1172e48354ceSNicholas Bellinger } 1173e48354ceSNicholas Bellinger cmd->tx_size = 0; 1174e48354ceSNicholas Bellinger 1175e48354ceSNicholas Bellinger return 0; 1176e48354ceSNicholas Bellinger } 1177e48354ceSNicholas Bellinger 1178e48354ceSNicholas Bellinger int iscsit_fe_sendpage_sg( 1179e48354ceSNicholas Bellinger struct iscsi_cmd *cmd, 1180e48354ceSNicholas Bellinger struct iscsi_conn *conn) 1181e48354ceSNicholas Bellinger { 1182e48354ceSNicholas Bellinger struct scatterlist *sg = cmd->first_data_sg; 1183e48354ceSNicholas Bellinger struct kvec iov; 1184e48354ceSNicholas Bellinger u32 tx_hdr_size, data_len; 1185e48354ceSNicholas Bellinger u32 offset = cmd->first_data_sg_off; 118640b05497SNicholas Bellinger int tx_sent, iov_off; 1187e48354ceSNicholas Bellinger 1188e48354ceSNicholas Bellinger send_hdr: 1189e48354ceSNicholas Bellinger tx_hdr_size = ISCSI_HDR_LEN; 1190e48354ceSNicholas Bellinger if (conn->conn_ops->HeaderDigest) 1191e48354ceSNicholas Bellinger tx_hdr_size += ISCSI_CRC_LEN; 1192e48354ceSNicholas Bellinger 1193e48354ceSNicholas Bellinger iov.iov_base = cmd->pdu; 1194e48354ceSNicholas Bellinger iov.iov_len = tx_hdr_size; 1195e48354ceSNicholas Bellinger 1196e48354ceSNicholas Bellinger tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); 1197e48354ceSNicholas Bellinger if (tx_hdr_size != tx_sent) { 1198e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1199e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1200e48354ceSNicholas Bellinger goto send_hdr; 1201e48354ceSNicholas Bellinger } 1202e48354ceSNicholas Bellinger return -1; 1203e48354ceSNicholas Bellinger } 1204e48354ceSNicholas Bellinger 1205e48354ceSNicholas Bellinger data_len = cmd->tx_size - tx_hdr_size - cmd->padding; 120640b05497SNicholas Bellinger /* 120740b05497SNicholas Bellinger * Set iov_off used by padding and data digest tx_data() calls below 120840b05497SNicholas Bellinger * in order to determine proper offset into cmd->iov_data[] 120940b05497SNicholas Bellinger */ 121040b05497SNicholas Bellinger if (conn->conn_ops->DataDigest) { 1211e48354ceSNicholas Bellinger data_len -= ISCSI_CRC_LEN; 121240b05497SNicholas Bellinger if (cmd->padding) 121340b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 2); 121440b05497SNicholas Bellinger else 121540b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 121640b05497SNicholas Bellinger } else { 121740b05497SNicholas Bellinger iov_off = (cmd->iov_data_count - 1); 121840b05497SNicholas Bellinger } 1219e48354ceSNicholas Bellinger /* 1220e48354ceSNicholas Bellinger * Perform sendpage() for each page in the scatterlist 1221e48354ceSNicholas Bellinger */ 1222e48354ceSNicholas Bellinger while (data_len) { 1223e48354ceSNicholas Bellinger u32 space = (sg->length - offset); 1224e48354ceSNicholas Bellinger u32 sub_len = min_t(u32, data_len, space); 1225e48354ceSNicholas Bellinger send_pg: 1226e48354ceSNicholas Bellinger tx_sent = conn->sock->ops->sendpage(conn->sock, 1227e48354ceSNicholas Bellinger sg_page(sg), sg->offset + offset, sub_len, 0); 1228e48354ceSNicholas Bellinger if (tx_sent != sub_len) { 1229e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1230e48354ceSNicholas Bellinger pr_err("tcp_sendpage() returned" 1231e48354ceSNicholas Bellinger " -EAGAIN\n"); 1232e48354ceSNicholas Bellinger goto send_pg; 1233e48354ceSNicholas Bellinger } 1234e48354ceSNicholas Bellinger 1235e48354ceSNicholas Bellinger pr_err("tcp_sendpage() failure: %d\n", 1236e48354ceSNicholas Bellinger tx_sent); 1237e48354ceSNicholas Bellinger return -1; 1238e48354ceSNicholas Bellinger } 1239e48354ceSNicholas Bellinger 1240e48354ceSNicholas Bellinger data_len -= sub_len; 1241e48354ceSNicholas Bellinger offset = 0; 1242e48354ceSNicholas Bellinger sg = sg_next(sg); 1243e48354ceSNicholas Bellinger } 1244e48354ceSNicholas Bellinger 1245e48354ceSNicholas Bellinger send_padding: 1246e48354ceSNicholas Bellinger if (cmd->padding) { 124740b05497SNicholas Bellinger struct kvec *iov_p = &cmd->iov_data[iov_off++]; 1248e48354ceSNicholas Bellinger 1249e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_p, 1, cmd->padding); 1250e48354ceSNicholas Bellinger if (cmd->padding != tx_sent) { 1251e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1252e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1253e48354ceSNicholas Bellinger goto send_padding; 1254e48354ceSNicholas Bellinger } 1255e48354ceSNicholas Bellinger return -1; 1256e48354ceSNicholas Bellinger } 1257e48354ceSNicholas Bellinger } 1258e48354ceSNicholas Bellinger 1259e48354ceSNicholas Bellinger send_datacrc: 1260e48354ceSNicholas Bellinger if (conn->conn_ops->DataDigest) { 126140b05497SNicholas Bellinger struct kvec *iov_d = &cmd->iov_data[iov_off]; 1262e48354ceSNicholas Bellinger 1263e48354ceSNicholas Bellinger tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); 1264e48354ceSNicholas Bellinger if (ISCSI_CRC_LEN != tx_sent) { 1265e48354ceSNicholas Bellinger if (tx_sent == -EAGAIN) { 1266e48354ceSNicholas Bellinger pr_err("tx_data() returned -EAGAIN\n"); 1267e48354ceSNicholas Bellinger goto send_datacrc; 1268e48354ceSNicholas Bellinger } 1269e48354ceSNicholas Bellinger return -1; 1270e48354ceSNicholas Bellinger } 1271e48354ceSNicholas Bellinger } 1272e48354ceSNicholas Bellinger 1273e48354ceSNicholas Bellinger return 0; 1274e48354ceSNicholas Bellinger } 1275e48354ceSNicholas Bellinger 1276e48354ceSNicholas Bellinger /* 1277e48354ceSNicholas Bellinger * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU 1278e48354ceSNicholas Bellinger * back to the Initiator when an expection condition occurs with the 1279e48354ceSNicholas Bellinger * errors set in status_class and status_detail. 1280e48354ceSNicholas Bellinger * 1281e48354ceSNicholas Bellinger * Parameters: iSCSI Connection, Status Class, Status Detail. 1282e48354ceSNicholas Bellinger * Returns: 0 on success, -1 on error. 1283e48354ceSNicholas Bellinger */ 1284e48354ceSNicholas Bellinger int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) 1285e48354ceSNicholas Bellinger { 1286e48354ceSNicholas Bellinger struct iscsi_login_rsp *hdr; 1287baa4d64bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1288e48354ceSNicholas Bellinger 1289baa4d64bSNicholas Bellinger login->login_failed = 1; 1290e48354ceSNicholas Bellinger iscsit_collect_login_stats(conn, status_class, status_detail); 1291e48354ceSNicholas Bellinger 1292baa4d64bSNicholas Bellinger hdr = (struct iscsi_login_rsp *)&login->rsp[0]; 1293e48354ceSNicholas Bellinger hdr->opcode = ISCSI_OP_LOGIN_RSP; 1294e48354ceSNicholas Bellinger hdr->status_class = status_class; 1295e48354ceSNicholas Bellinger hdr->status_detail = status_detail; 129666c7db68SChristoph Hellwig hdr->itt = conn->login_itt; 1297e48354ceSNicholas Bellinger 1298baa4d64bSNicholas Bellinger return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); 1299e48354ceSNicholas Bellinger } 1300e48354ceSNicholas Bellinger 1301e48354ceSNicholas Bellinger void iscsit_print_session_params(struct iscsi_session *sess) 1302e48354ceSNicholas Bellinger { 1303e48354ceSNicholas Bellinger struct iscsi_conn *conn; 1304e48354ceSNicholas Bellinger 1305e48354ceSNicholas Bellinger pr_debug("-----------------------------[Session Params for" 1306e48354ceSNicholas Bellinger " SID: %u]-----------------------------\n", sess->sid); 1307e48354ceSNicholas Bellinger spin_lock_bh(&sess->conn_lock); 1308e48354ceSNicholas Bellinger list_for_each_entry(conn, &sess->sess_conn_list, conn_list) 1309e48354ceSNicholas Bellinger iscsi_dump_conn_ops(conn->conn_ops); 1310e48354ceSNicholas Bellinger spin_unlock_bh(&sess->conn_lock); 1311e48354ceSNicholas Bellinger 1312e48354ceSNicholas Bellinger iscsi_dump_sess_ops(sess->sess_ops); 1313e48354ceSNicholas Bellinger } 1314e48354ceSNicholas Bellinger 1315e48354ceSNicholas Bellinger static int iscsit_do_rx_data( 1316e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1317e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1318e48354ceSNicholas Bellinger { 1319e48354ceSNicholas Bellinger int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; 13202ff017f5SNicholas Bellinger struct kvec *iov_p; 1321e48354ceSNicholas Bellinger struct msghdr msg; 1322e48354ceSNicholas Bellinger 1323e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1324e48354ceSNicholas Bellinger return -1; 1325e48354ceSNicholas Bellinger 1326e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1327e48354ceSNicholas Bellinger 1328e48354ceSNicholas Bellinger iov_p = count->iov; 1329e48354ceSNicholas Bellinger iov_len = count->iov_count; 1330e48354ceSNicholas Bellinger 1331e48354ceSNicholas Bellinger while (total_rx < data) { 1332e48354ceSNicholas Bellinger rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, 1333e48354ceSNicholas Bellinger (data - total_rx), MSG_WAITALL); 1334e48354ceSNicholas Bellinger if (rx_loop <= 0) { 1335e48354ceSNicholas Bellinger pr_debug("rx_loop: %d total_rx: %d\n", 1336e48354ceSNicholas Bellinger rx_loop, total_rx); 1337e48354ceSNicholas Bellinger return rx_loop; 1338e48354ceSNicholas Bellinger } 1339e48354ceSNicholas Bellinger total_rx += rx_loop; 1340e48354ceSNicholas Bellinger pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", 1341e48354ceSNicholas Bellinger rx_loop, total_rx, data); 1342e48354ceSNicholas Bellinger } 1343e48354ceSNicholas Bellinger 1344e48354ceSNicholas Bellinger return total_rx; 1345e48354ceSNicholas Bellinger } 1346e48354ceSNicholas Bellinger 1347e48354ceSNicholas Bellinger static int iscsit_do_tx_data( 1348e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1349e48354ceSNicholas Bellinger struct iscsi_data_count *count) 1350e48354ceSNicholas Bellinger { 1351e48354ceSNicholas Bellinger int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; 13522ff017f5SNicholas Bellinger struct kvec *iov_p; 1353e48354ceSNicholas Bellinger struct msghdr msg; 1354e48354ceSNicholas Bellinger 1355e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1356e48354ceSNicholas Bellinger return -1; 1357e48354ceSNicholas Bellinger 1358e48354ceSNicholas Bellinger if (data <= 0) { 1359e48354ceSNicholas Bellinger pr_err("Data length is: %d\n", data); 1360e48354ceSNicholas Bellinger return -1; 1361e48354ceSNicholas Bellinger } 1362e48354ceSNicholas Bellinger 1363e48354ceSNicholas Bellinger memset(&msg, 0, sizeof(struct msghdr)); 1364e48354ceSNicholas Bellinger 1365e48354ceSNicholas Bellinger iov_p = count->iov; 1366e48354ceSNicholas Bellinger iov_len = count->iov_count; 1367e48354ceSNicholas Bellinger 1368e48354ceSNicholas Bellinger while (total_tx < data) { 1369e48354ceSNicholas Bellinger tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, 1370e48354ceSNicholas Bellinger (data - total_tx)); 1371e48354ceSNicholas Bellinger if (tx_loop <= 0) { 1372e48354ceSNicholas Bellinger pr_debug("tx_loop: %d total_tx %d\n", 1373e48354ceSNicholas Bellinger tx_loop, total_tx); 1374e48354ceSNicholas Bellinger return tx_loop; 1375e48354ceSNicholas Bellinger } 1376e48354ceSNicholas Bellinger total_tx += tx_loop; 1377e48354ceSNicholas Bellinger pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", 1378e48354ceSNicholas Bellinger tx_loop, total_tx, data); 1379e48354ceSNicholas Bellinger } 1380e48354ceSNicholas Bellinger 1381e48354ceSNicholas Bellinger return total_tx; 1382e48354ceSNicholas Bellinger } 1383e48354ceSNicholas Bellinger 1384e48354ceSNicholas Bellinger int rx_data( 1385e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1386e48354ceSNicholas Bellinger struct kvec *iov, 1387e48354ceSNicholas Bellinger int iov_count, 1388e48354ceSNicholas Bellinger int data) 1389e48354ceSNicholas Bellinger { 1390e48354ceSNicholas Bellinger struct iscsi_data_count c; 1391e48354ceSNicholas Bellinger 1392e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1393e48354ceSNicholas Bellinger return -1; 1394e48354ceSNicholas Bellinger 1395e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1396e48354ceSNicholas Bellinger c.iov = iov; 1397e48354ceSNicholas Bellinger c.iov_count = iov_count; 1398e48354ceSNicholas Bellinger c.data_length = data; 1399e48354ceSNicholas Bellinger c.type = ISCSI_RX_DATA; 1400e48354ceSNicholas Bellinger 1401e48354ceSNicholas Bellinger return iscsit_do_rx_data(conn, &c); 1402e48354ceSNicholas Bellinger } 1403e48354ceSNicholas Bellinger 1404e48354ceSNicholas Bellinger int tx_data( 1405e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1406e48354ceSNicholas Bellinger struct kvec *iov, 1407e48354ceSNicholas Bellinger int iov_count, 1408e48354ceSNicholas Bellinger int data) 1409e48354ceSNicholas Bellinger { 1410e48354ceSNicholas Bellinger struct iscsi_data_count c; 1411e48354ceSNicholas Bellinger 1412e48354ceSNicholas Bellinger if (!conn || !conn->sock || !conn->conn_ops) 1413e48354ceSNicholas Bellinger return -1; 1414e48354ceSNicholas Bellinger 1415e48354ceSNicholas Bellinger memset(&c, 0, sizeof(struct iscsi_data_count)); 1416e48354ceSNicholas Bellinger c.iov = iov; 1417e48354ceSNicholas Bellinger c.iov_count = iov_count; 1418e48354ceSNicholas Bellinger c.data_length = data; 1419e48354ceSNicholas Bellinger c.type = ISCSI_TX_DATA; 1420e48354ceSNicholas Bellinger 1421e48354ceSNicholas Bellinger return iscsit_do_tx_data(conn, &c); 1422e48354ceSNicholas Bellinger } 1423e48354ceSNicholas Bellinger 1424e48354ceSNicholas Bellinger void iscsit_collect_login_stats( 1425e48354ceSNicholas Bellinger struct iscsi_conn *conn, 1426e48354ceSNicholas Bellinger u8 status_class, 1427e48354ceSNicholas Bellinger u8 status_detail) 1428e48354ceSNicholas Bellinger { 1429e48354ceSNicholas Bellinger struct iscsi_param *intrname = NULL; 1430e48354ceSNicholas Bellinger struct iscsi_tiqn *tiqn; 1431e48354ceSNicholas Bellinger struct iscsi_login_stats *ls; 1432e48354ceSNicholas Bellinger 1433e48354ceSNicholas Bellinger tiqn = iscsit_snmp_get_tiqn(conn); 1434e48354ceSNicholas Bellinger if (!tiqn) 1435e48354ceSNicholas Bellinger return; 1436e48354ceSNicholas Bellinger 1437e48354ceSNicholas Bellinger ls = &tiqn->login_stats; 1438e48354ceSNicholas Bellinger 1439e48354ceSNicholas Bellinger spin_lock(&ls->lock); 1440e48354ceSNicholas Bellinger if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && 1441e48354ceSNicholas Bellinger ((get_jiffies_64() - ls->last_fail_time) < 10)) { 1442e48354ceSNicholas Bellinger /* We already have the failure info for this login */ 1443e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1444e48354ceSNicholas Bellinger return; 1445e48354ceSNicholas Bellinger } 1446e48354ceSNicholas Bellinger 1447e48354ceSNicholas Bellinger if (status_class == ISCSI_STATUS_CLS_SUCCESS) 1448e48354ceSNicholas Bellinger ls->accepts++; 1449e48354ceSNicholas Bellinger else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { 1450e48354ceSNicholas Bellinger ls->redirects++; 1451e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; 1452e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1453e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { 1454e48354ceSNicholas Bellinger ls->authenticate_fails++; 1455e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; 1456e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1457e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { 1458e48354ceSNicholas Bellinger ls->authorize_fails++; 1459e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; 1460e48354ceSNicholas Bellinger } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && 1461e48354ceSNicholas Bellinger (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { 1462e48354ceSNicholas Bellinger ls->negotiate_fails++; 1463e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; 1464e48354ceSNicholas Bellinger } else { 1465e48354ceSNicholas Bellinger ls->other_fails++; 1466e48354ceSNicholas Bellinger ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; 1467e48354ceSNicholas Bellinger } 1468e48354ceSNicholas Bellinger 1469e48354ceSNicholas Bellinger /* Save initiator name, ip address and time, if it is a failed login */ 1470e48354ceSNicholas Bellinger if (status_class != ISCSI_STATUS_CLS_SUCCESS) { 1471e48354ceSNicholas Bellinger if (conn->param_list) 1472e48354ceSNicholas Bellinger intrname = iscsi_find_param_from_key(INITIATORNAME, 1473e48354ceSNicholas Bellinger conn->param_list); 1474e48354ceSNicholas Bellinger strcpy(ls->last_intr_fail_name, 1475e48354ceSNicholas Bellinger (intrname ? intrname->value : "Unknown")); 1476e48354ceSNicholas Bellinger 1477baa4d64bSNicholas Bellinger ls->last_intr_fail_ip_family = conn->login_family; 1478baa4d64bSNicholas Bellinger 1479e48354ceSNicholas Bellinger snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, 1480e48354ceSNicholas Bellinger "%s", conn->login_ip); 1481e48354ceSNicholas Bellinger ls->last_fail_time = get_jiffies_64(); 1482e48354ceSNicholas Bellinger } 1483e48354ceSNicholas Bellinger 1484e48354ceSNicholas Bellinger spin_unlock(&ls->lock); 1485e48354ceSNicholas Bellinger } 1486e48354ceSNicholas Bellinger 1487e48354ceSNicholas Bellinger struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) 1488e48354ceSNicholas Bellinger { 1489e48354ceSNicholas Bellinger struct iscsi_portal_group *tpg; 1490e48354ceSNicholas Bellinger 1491e48354ceSNicholas Bellinger if (!conn || !conn->sess) 1492e48354ceSNicholas Bellinger return NULL; 1493e48354ceSNicholas Bellinger 1494e48354ceSNicholas Bellinger tpg = conn->sess->tpg; 1495e48354ceSNicholas Bellinger if (!tpg) 1496e48354ceSNicholas Bellinger return NULL; 1497e48354ceSNicholas Bellinger 1498e48354ceSNicholas Bellinger if (!tpg->tpg_tiqn) 1499e48354ceSNicholas Bellinger return NULL; 1500e48354ceSNicholas Bellinger 1501e48354ceSNicholas Bellinger return tpg->tpg_tiqn; 1502e48354ceSNicholas Bellinger } 1503